diff --git a/fittrackee/__init__.py b/fittrackee/__init__.py
index fb41a930..34cd979e 100644
--- a/fittrackee/__init__.py
+++ b/fittrackee/__init__.py
@@ -20,7 +20,6 @@ from flask_limiter.util import get_remote_address
 from flask_migrate import Migrate
 from flask_sqlalchemy import SQLAlchemy
 from sqlalchemy.exc import ProgrammingError
-from sqlalchemy.orm import DeclarativeBase
 from werkzeug.middleware.proxy_fix import ProxyFix
 
 from fittrackee.emails.email import EmailService
@@ -39,12 +38,7 @@ logging.basicConfig(
 )
 appLog = logging.getLogger('fittrackee')
 
-
-class Base(DeclarativeBase):
-    pass
-
-
-db = SQLAlchemy(model_class=Base)
+db = SQLAlchemy()
 bcrypt = Bcrypt()
 migrate = Migrate()
 email_service = EmailService()
diff --git a/fittrackee/application/models.py b/fittrackee/application/models.py
index c2799d9a..0e8dcc72 100644
--- a/fittrackee/application/models.py
+++ b/fittrackee/application/models.py
@@ -5,30 +5,29 @@ from flask import current_app
 from sqlalchemy import exc
 from sqlalchemy.engine.base import Connection
 from sqlalchemy.event import listens_for
-from sqlalchemy.orm import mapped_column
+from sqlalchemy.ext.declarative import DeclarativeMeta
 from sqlalchemy.orm.mapper import Mapper
 from sqlalchemy.orm.session import Session
-from sqlalchemy.sql import text
 
 from fittrackee import VERSION, db
 from fittrackee.users.models import User
 
+BaseModel: DeclarativeMeta = db.Model
 
-class AppConfig(db.Model):  # type: ignore
+
+class AppConfig(BaseModel):
     __tablename__ = 'app_config'
-    id = mapped_column(db.Integer, primary_key=True, autoincrement=True)
-    max_users = mapped_column(db.Integer, default=0, nullable=False)
-    gpx_limit_import = mapped_column(db.Integer, default=10, nullable=False)
-    max_single_file_size = mapped_column(
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    max_users = db.Column(db.Integer, default=0, nullable=False)
+    gpx_limit_import = db.Column(db.Integer, default=10, nullable=False)
+    max_single_file_size = db.Column(
         db.Integer, default=1048576, nullable=False
     )
-    max_zip_file_size = mapped_column(
-        db.Integer, default=10485760, nullable=False
-    )
-    admin_contact = mapped_column(db.String(255), nullable=True)
-    privacy_policy_date = mapped_column(db.DateTime, nullable=True)
-    privacy_policy = mapped_column(db.Text, nullable=True)
-    about = mapped_column(db.Text, nullable=True)
+    max_zip_file_size = db.Column(db.Integer, default=10485760, nullable=False)
+    admin_contact = db.Column(db.String(255), nullable=True)
+    privacy_policy_date = db.Column(db.DateTime, nullable=True)
+    privacy_policy = db.Column(db.Text, nullable=True)
+    about = db.Column(db.Text, nullable=True)
 
     @property
     def is_registration_enabled(self) -> bool:
@@ -37,9 +36,8 @@ class AppConfig(db.Model):  # type: ignore
         except exc.ProgrammingError as e:
             # workaround for user model related migrations
             if 'psycopg2.errors.UndefinedColumn' in str(e):
-                query = db.session.execute(text("SELECT COUNT(*) FROM users;"))
-                result = query.fetchone()
-                nb_users = result[0] if result else 0
+                result = db.engine.execute("SELECT COUNT(*) FROM users;")
+                nb_users = result.fetchone()[0]
             else:
                 raise e
         return self.max_users == 0 or nb_users < self.max_users
diff --git a/fittrackee/migrations/commands.py b/fittrackee/migrations/commands.py
index aa5524a7..ea2cfb75 100644
--- a/fittrackee/migrations/commands.py
+++ b/fittrackee/migrations/commands.py
@@ -3,7 +3,6 @@ import shutil
 
 import click
 from flask_migrate import upgrade
-from sqlalchemy.sql import text
 
 from fittrackee import db
 from fittrackee.cli.app import app
@@ -37,7 +36,7 @@ def drop_db() -> None:
                 err=True,
             )
             return
-        db.session.execute(text("DROP TABLE IF EXISTS alembic_version;"))
+        db.engine.execute("DROP TABLE IF EXISTS alembic_version;")
         db.drop_all()
         db.session.commit()
         click.echo('Database dropped.')
diff --git a/fittrackee/oauth2/clean.py b/fittrackee/oauth2/clean.py
index c6e9a8dc..379863d1 100644
--- a/fittrackee/oauth2/clean.py
+++ b/fittrackee/oauth2/clean.py
@@ -4,6 +4,6 @@ from fittrackee.utils import clean
 def clean_tokens(days: int) -> int:
     sql = """
         DELETE FROM oauth2_token
-        WHERE oauth2_token.issued_at + oauth2_token.expires_in < :limit;
+        WHERE oauth2_token.issued_at + oauth2_token.expires_in < %(limit)s;
     """
     return clean(sql, days)
diff --git a/fittrackee/oauth2/models.py b/fittrackee/oauth2/models.py
index 1d14f387..df89d038 100644
--- a/fittrackee/oauth2/models.py
+++ b/fittrackee/oauth2/models.py
@@ -8,22 +8,23 @@ from authlib.integrations.sqla_oauth2 import (
 )
 from sqlalchemy.engine.base import Connection
 from sqlalchemy.event import listens_for
-from sqlalchemy.orm import mapped_column, relationship
+from sqlalchemy.ext.declarative import DeclarativeMeta
 from sqlalchemy.orm.mapper import Mapper
 from sqlalchemy.orm.session import Session
-from sqlalchemy.sql import text
 
 from fittrackee import db
 
+BaseModel: DeclarativeMeta = db.Model
 
-class OAuth2Client(OAuth2ClientMixin, db.Model):  # type: ignore
+
+class OAuth2Client(BaseModel, OAuth2ClientMixin):
     __tablename__ = 'oauth2_client'
 
-    id = mapped_column(db.Integer, primary_key=True)
-    user_id = mapped_column(
+    id = db.Column(db.Integer, primary_key=True)
+    user_id = db.Column(
         db.Integer, db.ForeignKey('users.id', ondelete='CASCADE'), index=True
     )
-    user = relationship('User')
+    user = db.relationship('User')
 
     def serialize(self, with_secret: bool = False) -> Dict:
         client = {
@@ -62,9 +63,7 @@ def on_old_oauth2_delete(
         ).delete(synchronize_session=False)
 
 
-class OAuth2AuthorizationCode(
-    OAuth2AuthorizationCodeMixin, db.Model  # type: ignore
-):
+class OAuth2AuthorizationCode(BaseModel, OAuth2AuthorizationCodeMixin):
     __tablename__ = 'oauth2_code'
     __table_args__ = (
         db.Index(
@@ -73,21 +72,21 @@ class OAuth2AuthorizationCode(
         ),
     )
 
-    id = mapped_column(db.Integer, primary_key=True)
-    user_id = mapped_column(
+    id = db.Column(db.Integer, primary_key=True)
+    user_id = db.Column(
         db.Integer, db.ForeignKey('users.id', ondelete='CASCADE'), index=True
     )
-    user = relationship('User')
+    user = db.relationship('User')
 
 
-class OAuth2Token(OAuth2TokenMixin, db.Model):  # type: ignore
+class OAuth2Token(BaseModel, OAuth2TokenMixin):
     __tablename__ = 'oauth2_token'
 
-    id = mapped_column(db.Integer, primary_key=True)
-    user_id = mapped_column(
+    id = db.Column(db.Integer, primary_key=True)
+    user_id = db.Column(
         db.Integer, db.ForeignKey('users.id', ondelete='CASCADE'), index=True
     )
-    user = relationship('User')
+    user = db.relationship('User')
 
     def is_refresh_token_active(self) -> bool:
         if self.is_revoked():
@@ -99,10 +98,10 @@ class OAuth2Token(OAuth2TokenMixin, db.Model):  # type: ignore
     def revoke_client_tokens(cls, client_id: str) -> None:
         sql = """
             UPDATE oauth2_token
-            SET access_token_revoked_at = :revoked_at
-            WHERE client_id = :client_id;
+            SET access_token_revoked_at = %(revoked_at)s
+            WHERE client_id = %(client_id)s;
         """
-        db.session.execute(
-            text(sql), {'client_id': client_id, 'revoked_at': int(time.time())}
+        db.engine.execute(
+            sql, {'client_id': client_id, 'revoked_at': int(time.time())}
         )
         db.session.commit()
diff --git a/fittrackee/tests/users/test_users_model.py b/fittrackee/tests/users/test_users_model.py
index c1e9ddfc..7da4c89a 100644
--- a/fittrackee/tests/users/test_users_model.py
+++ b/fittrackee/tests/users/test_users_model.py
@@ -23,29 +23,6 @@ class TestUserModel:
     ) -> None:
         assert '<User \'test\'>' == str(user_1)
 
-    def test_it_returns_workout_count_when_no_workouts(
-        self,
-        app: Flask,
-        user_1: User,
-        user_2: User,
-        sport_1_cycling: Sport,
-        workout_cycling_user_2: Workout,
-    ) -> None:
-        assert user_1.workouts_count == 0
-
-    def test_it_returns_workout_count_when_user_has_workout(
-        self,
-        app: Flask,
-        user_1: User,
-        user_2: User,
-        sport_1_cycling: Sport,
-        sport_2_running: Sport,
-        workout_cycling_user_1: Workout,
-        workout_running_user_1: Workout,
-        workout_cycling_user_2: Workout,
-    ) -> None:
-        assert user_1.workouts_count == 2
-
 
 class UserModelAssertMixin:
     @staticmethod
diff --git a/fittrackee/users/models.py b/fittrackee/users/models.py
index a7cec760..5298c496 100644
--- a/fittrackee/users/models.py
+++ b/fittrackee/users/models.py
@@ -7,8 +7,8 @@ from flask import current_app
 from sqlalchemy import func
 from sqlalchemy.engine.base import Connection
 from sqlalchemy.event import listens_for
+from sqlalchemy.ext.declarative import DeclarativeMeta
 from sqlalchemy.ext.hybrid import hybrid_property
-from sqlalchemy.orm import mapped_column, relationship
 from sqlalchemy.orm.mapper import Mapper
 from sqlalchemy.orm.session import Session
 from sqlalchemy.sql.expression import select
@@ -21,48 +21,48 @@ from .exceptions import UserNotFoundException
 from .roles import UserRole
 from .utils.token import decode_user_token, get_user_token
 
+BaseModel: DeclarativeMeta = db.Model
 
-class User(db.Model):  # type: ignore
+
+class User(BaseModel):
     __tablename__ = 'users'
-    id = mapped_column(db.Integer, primary_key=True, autoincrement=True)
-    username = mapped_column(db.String(255), unique=True, nullable=False)
-    email = mapped_column(db.String(255), unique=True, nullable=False)
-    password = mapped_column(db.String(255), nullable=False)
-    created_at = mapped_column(db.DateTime, nullable=False)
-    admin = mapped_column(db.Boolean, default=False, nullable=False)
-    first_name = mapped_column(db.String(80), nullable=True)
-    last_name = mapped_column(db.String(80), nullable=True)
-    birth_date = mapped_column(db.DateTime, nullable=True)
-    location = mapped_column(db.String(80), nullable=True)
-    bio = mapped_column(db.String(200), nullable=True)
-    picture = mapped_column(db.String(255), nullable=True)
-    timezone = mapped_column(db.String(50), nullable=True)
-    date_format = mapped_column(db.String(50), nullable=True)
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    username = db.Column(db.String(255), unique=True, nullable=False)
+    email = db.Column(db.String(255), unique=True, nullable=False)
+    password = db.Column(db.String(255), nullable=False)
+    created_at = db.Column(db.DateTime, nullable=False)
+    admin = db.Column(db.Boolean, default=False, nullable=False)
+    first_name = db.Column(db.String(80), nullable=True)
+    last_name = db.Column(db.String(80), nullable=True)
+    birth_date = db.Column(db.DateTime, nullable=True)
+    location = db.Column(db.String(80), nullable=True)
+    bio = db.Column(db.String(200), nullable=True)
+    picture = db.Column(db.String(255), nullable=True)
+    timezone = db.Column(db.String(50), nullable=True)
+    date_format = db.Column(db.String(50), nullable=True)
     # does the week start Monday?
-    weekm = mapped_column(db.Boolean, default=False, nullable=False)
-    workouts = relationship(
+    weekm = db.Column(db.Boolean, default=False, nullable=False)
+    workouts = db.relationship(
         'Workout',
         lazy=True,
         backref=db.backref('user', lazy='joined', single_parent=True),
     )
-    records = relationship(
+    records = db.relationship(
         'Record',
         lazy=True,
         backref=db.backref('user', lazy='joined', single_parent=True),
     )
-    language = mapped_column(db.String(50), nullable=True)
-    imperial_units = mapped_column(db.Boolean, default=False, nullable=False)
-    is_active = mapped_column(db.Boolean, default=False, nullable=False)
-    email_to_confirm = mapped_column(db.String(255), nullable=True)
-    confirmation_token = mapped_column(db.String(255), nullable=True)
-    display_ascent = mapped_column(db.Boolean, default=True, nullable=False)
-    accepted_policy_date = mapped_column(db.DateTime, nullable=True)
-    start_elevation_at_zero = mapped_column(
+    language = db.Column(db.String(50), nullable=True)
+    imperial_units = db.Column(db.Boolean, default=False, nullable=False)
+    is_active = db.Column(db.Boolean, default=False, nullable=False)
+    email_to_confirm = db.Column(db.String(255), nullable=True)
+    confirmation_token = db.Column(db.String(255), nullable=True)
+    display_ascent = db.Column(db.Boolean, default=True, nullable=False)
+    accepted_policy_date = db.Column(db.DateTime, nullable=True)
+    start_elevation_at_zero = db.Column(
         db.Boolean, default=True, nullable=False
     )
-    use_raw_gpx_speed = mapped_column(
-        db.Boolean, default=False, nullable=False
-    )
+    use_raw_gpx_speed = db.Column(db.Boolean, default=False, nullable=False)
 
     def __repr__(self) -> str:
         return f'<User {self.username!r}>'
@@ -138,7 +138,7 @@ class User(db.Model):  # type: ignore
     @workouts_count.expression  # type: ignore
     def workouts_count(self) -> int:
         return (
-            select(func.count(Workout.id))
+            select([func.count(Workout.id)])
             .where(Workout.user_id == self.id)
             .label('workouts_count')
         )
@@ -225,24 +225,22 @@ class User(db.Model):  # type: ignore
         return serialized_user
 
 
-class UserSportPreference(db.Model):  # type: ignore
+class UserSportPreference(BaseModel):
     __tablename__ = 'users_sports_preferences'
 
-    user_id = mapped_column(
+    user_id = db.Column(
         db.Integer,
         db.ForeignKey('users.id'),
         primary_key=True,
     )
-    sport_id = mapped_column(
+    sport_id = db.Column(
         db.Integer,
         db.ForeignKey('sports.id'),
         primary_key=True,
     )
-    color = mapped_column(db.String(50), nullable=True)
-    is_active = mapped_column(db.Boolean, default=True, nullable=False)
-    stopped_speed_threshold = mapped_column(
-        db.Float, default=1.0, nullable=False
-    )
+    color = db.Column(db.String(50), nullable=True)
+    is_active = db.Column(db.Boolean, default=True, nullable=False)
+    stopped_speed_threshold = db.Column(db.Float, default=1.0, nullable=False)
 
     def __init__(
         self,
@@ -265,13 +263,13 @@ class UserSportPreference(db.Model):  # type: ignore
         }
 
 
-class BlacklistedToken(db.Model):  # type: ignore
+class BlacklistedToken(BaseModel):
     __tablename__ = 'blacklisted_tokens'
 
-    id = mapped_column(db.Integer, primary_key=True, autoincrement=True)
-    token = mapped_column(db.String(500), unique=True, nullable=False)
-    expired_at = mapped_column(db.Integer, nullable=False)
-    blacklisted_on = mapped_column(db.DateTime, nullable=False)
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    token = db.Column(db.String(500), unique=True, nullable=False)
+    expired_at = db.Column(db.Integer, nullable=False)
+    blacklisted_on = db.Column(db.DateTime, nullable=False)
 
     def __init__(
         self, token: str, blacklisted_on: Optional[datetime] = None
@@ -292,25 +290,25 @@ class BlacklistedToken(db.Model):  # type: ignore
         return cls.query.filter_by(token=str(auth_token)).first() is not None
 
 
-class UserDataExport(db.Model):  # type: ignore
+class UserDataExport(BaseModel):
     __tablename__ = 'users_data_export'
 
-    id = mapped_column(db.Integer, primary_key=True, autoincrement=True)
-    user_id = mapped_column(
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    user_id = db.Column(
         db.Integer,
         db.ForeignKey('users.id', ondelete='CASCADE'),
         index=True,
         unique=True,
     )
-    created_at = mapped_column(
+    created_at = db.Column(
         db.DateTime, nullable=False, default=datetime.utcnow
     )
-    updated_at = mapped_column(
+    updated_at = db.Column(
         db.DateTime, nullable=True, onupdate=datetime.utcnow
     )
-    completed = mapped_column(db.Boolean, nullable=False, default=False)
-    file_name = mapped_column(db.String(100), nullable=True)
-    file_size = mapped_column(db.Integer, nullable=True)
+    completed = db.Column(db.Boolean, nullable=False, default=False)
+    file_name = db.Column(db.String(100), nullable=True)
+    file_size = db.Column(db.Integer, nullable=True)
 
     def __init__(
         self,
diff --git a/fittrackee/users/utils/token.py b/fittrackee/users/utils/token.py
index ebdabadf..0349ea36 100644
--- a/fittrackee/users/utils/token.py
+++ b/fittrackee/users/utils/token.py
@@ -55,6 +55,6 @@ def clean_blacklisted_tokens(days: int) -> int:
     """
     sql = """
         DELETE FROM blacklisted_tokens
-        WHERE blacklisted_tokens.expired_at < :limit;
+        WHERE blacklisted_tokens.expired_at < %(limit)s;
     """
     return clean(sql, days)
diff --git a/fittrackee/utils.py b/fittrackee/utils.py
index 4167cb1a..b777e992 100644
--- a/fittrackee/utils.py
+++ b/fittrackee/utils.py
@@ -3,7 +3,6 @@ from datetime import timedelta
 from typing import Optional
 
 import humanize
-from sqlalchemy.sql import text
 
 from fittrackee import db
 
@@ -27,6 +26,5 @@ def get_readable_duration(duration: int, locale: Optional[str] = None) -> str:
 
 def clean(sql: str, days: int) -> int:
     limit = int(time.time()) - (days * 86400)
-    result = db.session.execute(text(sql), {'limit': limit})
-    # DELETE statement returns CursorResult with the rowcount attribute
-    return result.rowcount  # type: ignore
+    result = db.engine.execute(sql, {'limit': limit})
+    return result.rowcount
diff --git a/fittrackee/workouts/models.py b/fittrackee/workouts/models.py
index 9c45e0b5..7afb8897 100644
--- a/fittrackee/workouts/models.py
+++ b/fittrackee/workouts/models.py
@@ -1,13 +1,13 @@
+import datetime
 import os
-from datetime import datetime, timedelta
 from typing import Any, Dict, Optional, Union
 from uuid import UUID, uuid4
 
 from sqlalchemy.dialects import postgresql
 from sqlalchemy.engine.base import Connection
 from sqlalchemy.event import listens_for
+from sqlalchemy.ext.declarative import DeclarativeMeta
 from sqlalchemy.ext.hybrid import hybrid_property
-from sqlalchemy.orm import mapped_column, relationship
 from sqlalchemy.orm.mapper import Mapper
 from sqlalchemy.orm.session import Session, object_session
 from sqlalchemy.types import JSON, Enum
@@ -18,6 +18,7 @@ from fittrackee.files import get_absolute_file_path
 from .utils.convert import convert_in_duration, convert_value_to_integer
 from .utils.short_id import encode_uuid
 
+BaseModel: DeclarativeMeta = db.Model
 record_types = [
     'AS',  # 'Best Average Speed'
     'FD',  # 'Farthest Distance'
@@ -66,20 +67,18 @@ def update_records(
             )
 
 
-class Sport(db.Model):  # type: ignore
+class Sport(BaseModel):
     __tablename__ = 'sports'
-    id = mapped_column(db.Integer, primary_key=True, autoincrement=True)
-    label = mapped_column(db.String(50), unique=True, nullable=False)
-    is_active = mapped_column(db.Boolean, default=True, nullable=False)
-    stopped_speed_threshold = mapped_column(
-        db.Float, default=1.0, nullable=False
-    )
-    workouts = relationship(
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    label = db.Column(db.String(50), unique=True, nullable=False)
+    is_active = db.Column(db.Boolean, default=True, nullable=False)
+    stopped_speed_threshold = db.Column(db.Float, default=1.0, nullable=False)
+    workouts = db.relationship(
         'Workout',
         lazy=True,
         backref=db.backref('sport', lazy='joined', single_parent=True),
     )
-    records = relationship(
+    records = db.relationship(
         'Record',
         lazy=True,
         backref=db.backref('sport', lazy='joined', single_parent=True),
@@ -121,49 +120,51 @@ class Sport(db.Model):  # type: ignore
         return serialized_sport
 
 
-class Workout(db.Model):  # type: ignore
+class Workout(BaseModel):
     __tablename__ = 'workouts'
-    id = mapped_column(db.Integer, primary_key=True, autoincrement=True)
-    uuid = mapped_column(
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    uuid = db.Column(
         postgresql.UUID(as_uuid=True),
         default=uuid4,
         unique=True,
         nullable=False,
     )
-    user_id = mapped_column(
+    user_id = db.Column(
         db.Integer, db.ForeignKey('users.id'), index=True, nullable=False
     )
-    sport_id = mapped_column(
+    sport_id = db.Column(
         db.Integer, db.ForeignKey('sports.id'), index=True, nullable=False
     )
-    title = mapped_column(db.String(255), nullable=True)
-    gpx = mapped_column(db.String(255), nullable=True)
-    creation_date = mapped_column(db.DateTime, default=datetime.utcnow)
-    modification_date = mapped_column(db.DateTime, onupdate=datetime.utcnow)
-    workout_date = mapped_column(db.DateTime, index=True, nullable=False)
-    duration = mapped_column(db.Interval, nullable=False)
-    pauses = mapped_column(db.Interval, nullable=True)
-    moving = mapped_column(db.Interval, nullable=True)
-    distance = mapped_column(db.Numeric(6, 3), nullable=True)  # kilometers
-    min_alt = mapped_column(db.Numeric(6, 2), nullable=True)  # meters
-    max_alt = mapped_column(db.Numeric(6, 2), nullable=True)  # meters
-    descent = mapped_column(db.Numeric(8, 3), nullable=True)  # meters
-    ascent = mapped_column(db.Numeric(8, 3), nullable=True)  # meters
-    max_speed = mapped_column(db.Numeric(6, 2), nullable=True)  # km/h
-    ave_speed = mapped_column(db.Numeric(6, 2), nullable=True)  # km/h
-    bounds = mapped_column(postgresql.ARRAY(db.Float), nullable=True)
-    map = mapped_column(db.String(255), nullable=True)
-    map_id = mapped_column(db.String(50), index=True, nullable=True)
-    weather_start = mapped_column(JSON, nullable=True)
-    weather_end = mapped_column(JSON, nullable=True)
-    notes = mapped_column(db.String(500), nullable=True)
-    segments = relationship(
+    title = db.Column(db.String(255), nullable=True)
+    gpx = db.Column(db.String(255), nullable=True)
+    creation_date = db.Column(db.DateTime, default=datetime.datetime.utcnow)
+    modification_date = db.Column(
+        db.DateTime, onupdate=datetime.datetime.utcnow
+    )
+    workout_date = db.Column(db.DateTime, index=True, nullable=False)
+    duration = db.Column(db.Interval, nullable=False)
+    pauses = db.Column(db.Interval, nullable=True)
+    moving = db.Column(db.Interval, nullable=True)
+    distance = db.Column(db.Numeric(6, 3), nullable=True)  # kilometers
+    min_alt = db.Column(db.Numeric(6, 2), nullable=True)  # meters
+    max_alt = db.Column(db.Numeric(6, 2), nullable=True)  # meters
+    descent = db.Column(db.Numeric(8, 3), nullable=True)  # meters
+    ascent = db.Column(db.Numeric(8, 3), nullable=True)  # meters
+    max_speed = db.Column(db.Numeric(6, 2), nullable=True)  # km/h
+    ave_speed = db.Column(db.Numeric(6, 2), nullable=True)  # km/h
+    bounds = db.Column(postgresql.ARRAY(db.Float), nullable=True)
+    map = db.Column(db.String(255), nullable=True)
+    map_id = db.Column(db.String(50), index=True, nullable=True)
+    weather_start = db.Column(JSON, nullable=True)
+    weather_end = db.Column(JSON, nullable=True)
+    notes = db.Column(db.String(500), nullable=True)
+    segments = db.relationship(
         'WorkoutSegment',
         lazy=True,
         cascade='all, delete',
         backref=db.backref('workout', lazy='joined', single_parent=True),
     )
-    records = relationship(
+    records = db.relationship(
         'Record',
         lazy=True,
         cascade='all, delete',
@@ -177,9 +178,9 @@ class Workout(db.Model):  # type: ignore
         self,
         user_id: int,
         sport_id: int,
-        workout_date: datetime,
+        workout_date: datetime.datetime,
         distance: float,
-        duration: timedelta,
+        duration: datetime.timedelta,
     ) -> None:
         self.user_id = user_id
         self.sport_id = sport_id
@@ -241,10 +242,11 @@ class Workout(db.Model):  # type: ignore
                 Workout.sport_id == sport_id if sport_id else True,
                 Workout.workout_date <= self.workout_date,
                 Workout.workout_date
-                >= datetime.strptime(date_from, '%Y-%m-%d')
+                >= datetime.datetime.strptime(date_from, '%Y-%m-%d')
                 if date_from
                 else True,
-                Workout.workout_date <= datetime.strptime(date_to, '%Y-%m-%d')
+                Workout.workout_date
+                <= datetime.datetime.strptime(date_to, '%Y-%m-%d')
                 if date_to
                 else True,
                 Workout.distance >= float(distance_from)
@@ -282,10 +284,11 @@ class Workout(db.Model):  # type: ignore
                 Workout.sport_id == sport_id if sport_id else True,
                 Workout.workout_date >= self.workout_date,
                 Workout.workout_date
-                >= datetime.strptime(date_from, '%Y-%m-%d')
+                >= datetime.datetime.strptime(date_from, '%Y-%m-%d')
                 if date_from
                 else True,
-                Workout.workout_date <= datetime.strptime(date_to, '%Y-%m-%d')
+                Workout.workout_date
+                <= datetime.datetime.strptime(date_to, '%Y-%m-%d')
                 if date_to
                 else True,
                 Workout.distance >= float(distance_from)
@@ -377,10 +380,9 @@ def on_workout_insert(
 def on_workout_update(
     mapper: Mapper, connection: Connection, workout: Workout
 ) -> None:
-    workout_session = object_session(workout)
-    if workout_session is not None and workout_session.is_modified(
+    if object_session(workout).is_modified(
         workout, include_collections=True
-    ):
+    ):  # noqa
 
         @listens_for(db.Session, 'after_flush', once=True)
         def receive_after_flush(session: Session, context: Any) -> None:
@@ -411,23 +413,23 @@ def on_workout_delete(
                 appLog.error('gpx file not found when deleting workout')
 
 
-class WorkoutSegment(db.Model):  # type: ignore
+class WorkoutSegment(BaseModel):
     __tablename__ = 'workout_segments'
-    workout_id = mapped_column(
+    workout_id = db.Column(
         db.Integer, db.ForeignKey('workouts.id'), primary_key=True
     )
-    workout_uuid = mapped_column(postgresql.UUID(as_uuid=True), nullable=False)
-    segment_id = mapped_column(db.Integer, primary_key=True)
-    duration = mapped_column(db.Interval, nullable=False)
-    pauses = mapped_column(db.Interval, nullable=True)
-    moving = mapped_column(db.Interval, nullable=True)
-    distance = mapped_column(db.Numeric(6, 3), nullable=True)  # kilometers
-    min_alt = mapped_column(db.Numeric(6, 2), nullable=True)  # meters
-    max_alt = mapped_column(db.Numeric(6, 2), nullable=True)  # meters
-    descent = mapped_column(db.Numeric(8, 3), nullable=True)  # meters
-    ascent = mapped_column(db.Numeric(8, 3), nullable=True)  # meters
-    max_speed = mapped_column(db.Numeric(6, 2), nullable=True)  # km/h
-    ave_speed = mapped_column(db.Numeric(6, 2), nullable=True)  # km/h
+    workout_uuid = db.Column(postgresql.UUID(as_uuid=True), nullable=False)
+    segment_id = db.Column(db.Integer, primary_key=True)
+    duration = db.Column(db.Interval, nullable=False)
+    pauses = db.Column(db.Interval, nullable=True)
+    moving = db.Column(db.Interval, nullable=True)
+    distance = db.Column(db.Numeric(6, 3), nullable=True)  # kilometers
+    min_alt = db.Column(db.Numeric(6, 2), nullable=True)  # meters
+    max_alt = db.Column(db.Numeric(6, 2), nullable=True)  # meters
+    descent = db.Column(db.Numeric(8, 3), nullable=True)  # meters
+    ascent = db.Column(db.Numeric(8, 3), nullable=True)  # meters
+    max_speed = db.Column(db.Numeric(6, 2), nullable=True)  # km/h
+    ave_speed = db.Column(db.Numeric(6, 2), nullable=True)  # km/h
 
     def __str__(self) -> str:
         return (
@@ -459,27 +461,25 @@ class WorkoutSegment(db.Model):  # type: ignore
         }
 
 
-class Record(db.Model):  # type: ignore
+class Record(BaseModel):
     __tablename__ = "records"
     __table_args__ = (
         db.UniqueConstraint(
             'user_id', 'sport_id', 'record_type', name='user_sports_records'
         ),
     )
-    id = mapped_column(db.Integer, primary_key=True, autoincrement=True)
-    user_id = mapped_column(
-        db.Integer, db.ForeignKey('users.id'), nullable=False
-    )
-    sport_id = mapped_column(
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    user_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
+    sport_id = db.Column(
         db.Integer, db.ForeignKey('sports.id'), nullable=False
     )
-    workout_id = mapped_column(
+    workout_id = db.Column(
         db.Integer, db.ForeignKey('workouts.id'), nullable=False
     )
-    workout_uuid = mapped_column(postgresql.UUID(as_uuid=True), nullable=False)
-    record_type = mapped_column(Enum(*record_types, name="record_types"))
-    workout_date = mapped_column(db.DateTime, nullable=False)
-    _value = mapped_column("value", db.Integer, nullable=True)
+    workout_uuid = db.Column(postgresql.UUID(as_uuid=True), nullable=False)
+    record_type = db.Column(Enum(*record_types, name="record_types"))
+    workout_date = db.Column(db.DateTime, nullable=False)
+    _value = db.Column("value", db.Integer, nullable=True)
 
     def __str__(self) -> str:
         return (
@@ -497,11 +497,11 @@ class Record(db.Model):  # type: ignore
         self.workout_date = workout.workout_date
 
     @hybrid_property
-    def value(self) -> Optional[Union[timedelta, float]]:
+    def value(self) -> Optional[Union[datetime.timedelta, float]]:
         if self._value is None:
             return None
         if self.record_type == 'LD':
-            return timedelta(seconds=self._value)
+            return datetime.timedelta(seconds=self._value)
         elif self.record_type in ['AS', 'MS']:
             return float(self._value / 100)
         else:  # 'FD' or 'HA'
diff --git a/poetry.lock b/poetry.lock
index c95eb33c..520dea07 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -738,18 +738,18 @@ Flask-SQLAlchemy = ">=1.0"
 
 [[package]]
 name = "flask-sqlalchemy"
-version = "3.1.1"
+version = "3.0.5"
 description = "Add SQLAlchemy support to your Flask application."
 optional = false
-python-versions = ">=3.8"
+python-versions = ">=3.7"
 files = [
-    {file = "flask_sqlalchemy-3.1.1-py3-none-any.whl", hash = "sha256:4ba4be7f419dc72f4efd8802d69974803c37259dd42f3913b0dcf75c9447e0a0"},
-    {file = "flask_sqlalchemy-3.1.1.tar.gz", hash = "sha256:e4b68bb881802dda1a7d878b2fc84c06d1ee57fb40b874d3dc97dabfa36b8312"},
+    {file = "flask_sqlalchemy-3.0.5-py3-none-any.whl", hash = "sha256:cabb6600ddd819a9f859f36515bb1bd8e7dbf30206cc679d2b081dff9e383283"},
+    {file = "flask_sqlalchemy-3.0.5.tar.gz", hash = "sha256:c5765e58ca145401b52106c0f46178569243c5da25556be2c231ecc60867c5b1"},
 ]
 
 [package.dependencies]
 flask = ">=2.2.5"
-sqlalchemy = ">=2.0.16"
+sqlalchemy = ">=1.4.18"
 
 [[package]]
 name = "freezegun"
@@ -2293,80 +2293,73 @@ test = ["pytest"]
 
 [[package]]
 name = "sqlalchemy"
-version = "2.0.21"
+version = "1.4.49"
 description = "Database Abstraction Library"
 optional = false
-python-versions = ">=3.7"
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,>=2.7"
 files = [
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+    {file = "SQLAlchemy-1.4.49.tar.gz", hash = "sha256:06ff25cbae30c396c4b7737464f2a7fc37a67b7da409993b182b024cec80aed9"},
 ]
 
 [package.dependencies]
-greenlet = {version = "!=0.4.17", markers = "platform_machine == \"win32\" or platform_machine == \"WIN32\" or platform_machine == \"AMD64\" or platform_machine == \"amd64\" or platform_machine == \"x86_64\" or platform_machine == \"ppc64le\" or platform_machine == \"aarch64\""}
-typing-extensions = ">=4.2.0"
+greenlet = {version = "!=0.4.17", markers = "python_version >= \"3\" and (platform_machine == \"win32\" or platform_machine == \"WIN32\" or platform_machine == \"AMD64\" or platform_machine == \"amd64\" or platform_machine == \"x86_64\" or platform_machine == \"ppc64le\" or platform_machine == \"aarch64\")"}
 
 [package.extras]
-aiomysql = ["aiomysql (>=0.2.0)", "greenlet (!=0.4.17)"]
+aiomysql = ["aiomysql", "greenlet (!=0.4.17)"]
 aiosqlite = ["aiosqlite", "greenlet (!=0.4.17)", "typing-extensions (!=3.10.0.1)"]
 asyncio = ["greenlet (!=0.4.17)"]
-asyncmy = ["asyncmy (>=0.2.3,!=0.2.4,!=0.2.6)", "greenlet (!=0.4.17)"]
-mariadb-connector = ["mariadb (>=1.0.1,!=1.1.2,!=1.1.5)"]
+asyncmy = ["asyncmy (>=0.2.3,!=0.2.4)", "greenlet (!=0.4.17)"]
+mariadb-connector = ["mariadb (>=1.0.1,!=1.1.2)"]
 mssql = ["pyodbc"]
 mssql-pymssql = ["pymssql"]
 mssql-pyodbc = ["pyodbc"]
-mypy = ["mypy (>=0.910)"]
-mysql = ["mysqlclient (>=1.4.0)"]
+mypy = ["mypy (>=0.910)", "sqlalchemy2-stubs"]
+mysql = ["mysqlclient (>=1.4.0)", "mysqlclient (>=1.4.0,<2)"]
 mysql-connector = ["mysql-connector-python"]
-oracle = ["cx-oracle (>=7)"]
-oracle-oracledb = ["oracledb (>=1.0.1)"]
+oracle = ["cx-oracle (>=7)", "cx-oracle (>=7,<8)"]
 postgresql = ["psycopg2 (>=2.7)"]
 postgresql-asyncpg = ["asyncpg", "greenlet (!=0.4.17)"]
-postgresql-pg8000 = ["pg8000 (>=1.29.1)"]
-postgresql-psycopg = ["psycopg (>=3.0.7)"]
+postgresql-pg8000 = ["pg8000 (>=1.16.6,!=1.29.0)"]
 postgresql-psycopg2binary = ["psycopg2-binary"]
 postgresql-psycopg2cffi = ["psycopg2cffi"]
-postgresql-psycopgbinary = ["psycopg[binary] (>=3.0.7)"]
-pymysql = ["pymysql"]
+pymysql = ["pymysql", "pymysql (<1)"]
 sqlcipher = ["sqlcipher3-binary"]
 
 [[package]]
@@ -2720,4 +2713,4 @@ testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "p
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8.1"
-content-hash = "fe398b8d9c8bb4223284e01983948f0837ef862554b2673705fb8de963f3ed4b"
+content-hash = "8455a7b70d2a966152da804dcbaa3780bb516953105ce2b73c7e2442432f3ae6"
diff --git a/pyproject.toml b/pyproject.toml
index 0800dded..4a33cb92 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,6 @@ flask = "^3.0"
 flask-bcrypt = "^1.0"
 flask-dramatiq = "^0.6"
 flask-limiter = {version = "^3.5", extras = ["redis"]}
-flask-sqlalchemy = "^3.1"
 flask-migrate = "^4.0"
 gpxpy = "=1.5.0"
 gunicorn = "^21.0"
@@ -44,7 +43,7 @@ pyopenssl = "^23.2"
 pytz = "^2023.3"
 shortuuid = "^1.0.11"
 staticmap = "^0.5.7"
-sqlalchemy = "=2.0.21"
+sqlalchemy = "=1.4.49"
 ua-parser = "^0.18.0"
 
 [tool.poetry.group.dev.dependencies]