diff --git a/mpwo_api/mpwo_api/activities/models.py b/mpwo_api/mpwo_api/activities/models.py
index 1c198896..b48d9003 100644
--- a/mpwo_api/mpwo_api/activities/models.py
+++ b/mpwo_api/mpwo_api/activities/models.py
@@ -1,6 +1,7 @@
 import datetime
 
 from mpwo_api import db
+from sqlalchemy.ext.hybrid import hybrid_property
 from sqlalchemy.types import Enum
 
 record_types = [
@@ -64,8 +65,8 @@ class Activity(db.Model):
     max_alt = db.Column(db.Numeric(5, 2), nullable=True)     # meters
     descent = db.Column(db.Numeric(5, 2), nullable=True)     # meters
     ascent = db.Column(db.Numeric(5, 2), nullable=True)      # meters
-    max_speed = db.Column(db.Numeric(5, 3), nullable=True)   # km/h
-    ave_speed = db.Column(db.Numeric(5, 3), nullable=True)   # km/h
+    max_speed = db.Column(db.Numeric(5, 2), nullable=True)   # km/h
+    ave_speed = db.Column(db.Numeric(5, 2), nullable=True)   # km/h
     records = db.relationship('Record',
                               lazy=True,
                               backref=db.backref('activities', lazy='joined'))
@@ -125,8 +126,7 @@ class Record(db.Model):
         nullable=False)
     record_type = db.Column(Enum(*record_types, name="record_types"))
     activity_date = db.Column(db.DateTime, nullable=False)
-    value_interval = db.Column(db.Interval, nullable=True)
-    value_float = db.Column(db.Numeric(5, 3), nullable=True)
+    _value = db.Column("value", db.Integer, nullable=True)
 
     def __str__(self):
         return str(self.sports.label) + \
@@ -140,7 +140,36 @@ class Record(db.Model):
         self.record_type = record_type
         self.activity_date = activity.activity_date
 
+    @hybrid_property
+    def value(self):
+        if self._value is None:
+            return None
+
+        if self.record_type == 'LD':
+            return datetime.timedelta(seconds=self._value)
+        elif self.record_type in ['AS', 'MS']:
+            return float(self._value / 100)
+        else:  # 'FD'
+            return float(self._value / 1000)
+
+    @value.setter
+    def value(self, val):
+        if self.record_type == 'LD':
+            hours, minutes, seconds = str(val).split(':')
+            self._value = int(hours) * 3600 + int(minutes) * 60 + int(seconds)
+        elif self.record_type in ['AS', 'MS']:
+            self._value = int(val * 100)
+        else:  # 'FD'
+            self._value = int(val * 1000)
+
     def serialize(self):
+        if self.value is None:
+            value = None
+        elif self.record_type in ['AS', 'FD', 'MS']:
+            value = float(self.value)
+        else:  # 'LD'
+            value = str(self.value)
+
         return {
             "id": self.id,
             "user_id": self.user_id,
@@ -148,8 +177,5 @@ class Record(db.Model):
             "activity_id": self.activity_id,
             "record_type": self.record_type,
             "activity_date": self.activity_date,
-            "value_interval": str(
-                self.value_interval) if self.value_interval else None,
-            "value_float": str(
-                self.value_float) if self.value_float else None,
+            "value": value,
         }
diff --git a/mpwo_api/mpwo_api/tests/test_activities_api_1_post.py b/mpwo_api/mpwo_api/tests/test_activities_api_1_post.py
index b0d3a3a9..8f805447 100644
--- a/mpwo_api/mpwo_api/tests/test_activities_api_1_post.py
+++ b/mpwo_api/mpwo_api/tests/test_activities_api_1_post.py
@@ -42,11 +42,11 @@ def test_add_an_activity_gpx(app):
     assert 1 == data['data']['activities'][0]['sport_id']
     assert '0:04:10' == data['data']['activities'][0]['duration']
     assert data['data']['activities'][0]['ascent'] == 0.4
-    assert data['data']['activities'][0]['ave_speed'] == 4.602
+    assert data['data']['activities'][0]['ave_speed'] == 4.6
     assert data['data']['activities'][0]['descent'] == 23.4
     assert data['data']['activities'][0]['distance'] == 0.32
     assert data['data']['activities'][0]['max_alt'] == 998.0
-    assert data['data']['activities'][0]['max_speed'] == 5.086
+    assert data['data']['activities'][0]['max_speed'] == 5.09
     assert data['data']['activities'][0]['min_alt'] == 975.0
     assert data['data']['activities'][0]['moving'] == '0:04:10'
     assert data['data']['activities'][0]['pauses'] is None
@@ -99,11 +99,11 @@ def test_get_an_activity_with_gpx(app):
     assert 1 == data['data']['activities'][0]['sport_id']
     assert '0:04:10' == data['data']['activities'][0]['duration']
     assert data['data']['activities'][0]['ascent'] == 0.4
-    assert data['data']['activities'][0]['ave_speed'] == 4.602
+    assert data['data']['activities'][0]['ave_speed'] == 4.6
     assert data['data']['activities'][0]['descent'] == 23.4
     assert data['data']['activities'][0]['distance'] == 0.32
     assert data['data']['activities'][0]['max_alt'] == 998.0
-    assert data['data']['activities'][0]['max_speed'] == 5.086
+    assert data['data']['activities'][0]['max_speed'] == 5.09
     assert data['data']['activities'][0]['min_alt'] == 975.0
     assert data['data']['activities'][0]['moving'] == '0:04:10'
     assert data['data']['activities'][0]['pauses'] is None
diff --git a/mpwo_api/mpwo_api/tests/test_activities_api_2_patch.py b/mpwo_api/mpwo_api/tests/test_activities_api_2_patch.py
index 6d7d5258..e947f467 100644
--- a/mpwo_api/mpwo_api/tests/test_activities_api_2_patch.py
+++ b/mpwo_api/mpwo_api/tests/test_activities_api_2_patch.py
@@ -58,11 +58,11 @@ def test_edit_an_activity_with_gpx(app):
     assert 2 == data['data']['activities'][0]['sport_id']
     assert '0:04:10' == data['data']['activities'][0]['duration']
     assert data['data']['activities'][0]['ascent'] == 0.4
-    assert data['data']['activities'][0]['ave_speed'] == 4.602
+    assert data['data']['activities'][0]['ave_speed'] == 4.6
     assert data['data']['activities'][0]['descent'] == 23.4
     assert data['data']['activities'][0]['distance'] == 0.32
     assert data['data']['activities'][0]['max_alt'] == 998.0
-    assert data['data']['activities'][0]['max_speed'] == 5.086
+    assert data['data']['activities'][0]['max_speed'] == 5.09
     assert data['data']['activities'][0]['min_alt'] == 975.0
     assert data['data']['activities'][0]['moving'] == '0:04:10'
     assert data['data']['activities'][0]['pauses'] is None
@@ -263,11 +263,11 @@ def test_edit_an_activity_wo_gpx_partial(app):
     assert data['data']['activities'][0]['sport_id'] == 1
     assert data['data']['activities'][0]['duration'] == '0:17:04'
     assert data['data']['activities'][0]['ascent'] is None
-    assert data['data']['activities'][0]['ave_speed'] == 35.156
+    assert data['data']['activities'][0]['ave_speed'] == 35.16
     assert data['data']['activities'][0]['descent'] is None
     assert data['data']['activities'][0]['distance'] == 10.0
     assert data['data']['activities'][0]['max_alt'] is None
-    assert data['data']['activities'][0]['max_speed'] == 35.156
+    assert data['data']['activities'][0]['max_speed'] == 35.16
     assert data['data']['activities'][0]['min_alt'] is None
     assert data['data']['activities'][0]['moving'] is None  # no calculated
     assert data['data']['activities'][0]['pauses'] is None
diff --git a/mpwo_api/mpwo_api/tests/test_records_api.py b/mpwo_api/mpwo_api/tests/test_records_api.py
index 155f3103..bc2a006e 100644
--- a/mpwo_api/mpwo_api/tests/test_records_api.py
+++ b/mpwo_api/mpwo_api/tests/test_records_api.py
@@ -65,13 +65,11 @@ def test_get_all_activities_for_authenticated_user(app):
     assert 1 == data['data']['records'][0]['sport_id']
     assert 3 == data['data']['records'][0]['activity_id']
     assert 'FD' == data['data']['records'][0]['record_type']
-    assert 'value_interval' in data['data']['records'][0]
-    assert 'value_float' in data['data']['records'][0]
+    assert 'value' in data['data']['records'][0]
 
     assert 'Mon, 01 Jan 2018 00:00:00 GMT' == data['data']['records'][1]['activity_date']  # noqa
     assert 1 == data['data']['records'][1]['user_id']
     assert 2 == data['data']['records'][1]['sport_id']
     assert 1 == data['data']['records'][1]['activity_id']
     assert 'LD' == data['data']['records'][1]['record_type']
-    assert 'value_interval' in data['data']['records'][1]
-    assert 'value_float' in data['data']['records'][1]
+    assert 'value' in data['data']['records'][1]
diff --git a/mpwo_api/mpwo_api/tests/test_records_model.py b/mpwo_api/mpwo_api/tests/test_records_model.py
index 3ff07098..52b90ac4 100644
--- a/mpwo_api/mpwo_api/tests/test_records_model.py
+++ b/mpwo_api/mpwo_api/tests/test_records_model.py
@@ -23,3 +23,148 @@ def test_add_record(app):
     assert 'LD' == record.record_type
     assert '2018-01-01 13:36:00' == str(record.activity_date)
     assert 'cycling - LD - 2018-01-01' == str(record)
+
+    record_serialize = record.serialize()
+    assert 'id' in record_serialize
+    assert 'user_id' in record_serialize
+    assert 'sport_id' in record_serialize
+    assert 'activity_id' in record_serialize
+    assert 'record_type' in record_serialize
+    assert 'activity_date' in record_serialize
+    assert 'value' in record_serialize
+
+
+def test_add_records_no_value(app):
+    add_user('test', 'test@test.com', '12345678')
+    add_sport('cycling')
+
+    activity = add_activity(
+        user_id=1,
+        sport_id=1,
+        activity_date=datetime.datetime.strptime('01/01/2018 13:36', '%d/%m/%Y %H:%M'),  # noqa
+        distance=10,
+        duration=datetime.timedelta(seconds=1024)
+    )
+    record = add_record(1, 1, activity, 'AS')
+
+    assert record.value is None
+    assert record._value is None
+
+    record_serialize = record.serialize()
+    assert record_serialize.get('value') is None
+
+
+def test_add_as_records(app):
+    add_user('test', 'test@test.com', '12345678')
+    add_sport('cycling')
+
+    activity = add_activity(
+        user_id=1,
+        sport_id=1,
+        activity_date=datetime.datetime.strptime('01/01/2018 13:36', '%d/%m/%Y %H:%M'),  # noqa
+        distance=10,
+        duration=datetime.timedelta(seconds=1024)
+    )
+    record = add_record(1, 1, activity, 'AS')
+    # record.value = 4.6
+    record.value = 4.61
+
+    assert isinstance(record.value, float)
+    assert record.value == 4.61
+    assert record._value == 461
+
+    record_serialize = record.serialize()
+    assert record_serialize.get('value') == 4.61
+    assert isinstance(record_serialize.get('value'), float)
+
+
+def test_add_fd_records(app):
+    add_user('test', 'test@test.com', '12345678')
+    add_sport('cycling')
+
+    activity = add_activity(
+        user_id=1,
+        sport_id=1,
+        activity_date=datetime.datetime.strptime('01/01/2018 13:36', '%d/%m/%Y %H:%M'),  # noqa
+        distance=10,
+        duration=datetime.timedelta(seconds=1024)
+    )
+    record = add_record(1, 1, activity, 'FD')
+    record.value = 0.322
+
+    assert isinstance(record.value, float)
+    assert record.value == 0.322
+    assert record._value == 322
+
+    record_serialize = record.serialize()
+    assert record_serialize.get('value') == 0.322
+    assert isinstance(record_serialize.get('value'), float)
+
+
+def test_add_ld_records(app):
+    add_user('test', 'test@test.com', '12345678')
+    add_sport('cycling')
+
+    activity = add_activity(
+        user_id=1,
+        sport_id=1,
+        activity_date=datetime.datetime.strptime('01/01/2018 13:36', '%d/%m/%Y %H:%M'),  # noqa
+        distance=10,
+        duration=datetime.timedelta(seconds=1024)
+    )
+    record = add_record(1, 1, activity, 'LD')
+    record.value = activity.duration
+
+    assert isinstance(record.value, datetime.timedelta)
+    assert str(record.value) == '0:17:04'
+    assert record._value == 1024
+
+    record_serialize = record.serialize()
+    assert record_serialize.get('value') == '0:17:04'
+    assert isinstance(record_serialize.get('value'), str)
+
+
+def test_add_ld_records_zero(app):
+    add_user('test', 'test@test.com', '12345678')
+    add_sport('cycling')
+
+    activity = add_activity(
+        user_id=1,
+        sport_id=1,
+        activity_date=datetime.datetime.strptime('01/01/2018 13:36', '%d/%m/%Y %H:%M'),  # noqa
+        distance=10,
+        duration=datetime.timedelta(seconds=0)
+    )
+    record = add_record(1, 1, activity, 'LD')
+    record.value = activity.duration
+
+    assert isinstance(record.value, datetime.timedelta)
+    assert str(record.value) == '0:00:00'
+    assert record._value == 0
+
+    record_serialize = record.serialize()
+    assert record_serialize.get('value') == '0:00:00'
+    assert isinstance(record_serialize.get('value'), str)
+
+
+def test_add_ms_records_no_value(app):
+    add_user('test', 'test@test.com', '12345678')
+    add_sport('cycling')
+
+    activity = add_activity(
+        user_id=1,
+        sport_id=1,
+        activity_date=datetime.datetime.strptime('01/01/2018 13:36', '%d/%m/%Y %H:%M'),  # noqa
+        distance=10,
+        duration=datetime.timedelta(seconds=1024)
+    )
+    record = add_record(1, 1, activity, 'MS')
+    record.value = 23.5
+
+    assert isinstance(record.value, float)
+    assert record.value == 23.5
+    assert record._value == 2350
+
+    record_serialize = record.serialize()
+    assert record_serialize.get('value') == 23.5
+    assert isinstance(record_serialize.get('value'), float)
diff --git a/mpwo_api/mpwo_api/tests/test_users_model.py b/mpwo_api/mpwo_api/tests/test_users_model.py
index d131ffc2..fee6118e 100644
--- a/mpwo_api/mpwo_api/tests/test_users_model.py
+++ b/mpwo_api/mpwo_api/tests/test_users_model.py
@@ -4,4 +4,3 @@ from mpwo_api.tests.utils import add_user
 def test_add_user(app):
     user = add_user('test', 'test@test.com', '12345678')
     assert '<User \'test\'>' == str(user)
-