diff --git a/src/lib/js/fitnessI18n.ts b/src/lib/js/fitnessI18n.ts
index 7a1110a..be29fd7 100644
--- a/src/lib/js/fitnessI18n.ts
+++ b/src/lib/js/fitnessI18n.ts
@@ -108,7 +108,7 @@ const translations: Translations = {
 
 	// Workout templates page
 	next_in_schedule: { en: 'Next in schedule', de: 'Nächstes im Plan' },
-	start_empty_workout: { en: 'START AN EMPTY WORKOUT', de: 'LEERES TRAINING STARTEN' },
+	start_empty_workout: { en: 'Empty Workout', de: 'leeres Training' },
 	templates: { en: 'Templates', de: 'Vorlagen' },
 	schedule: { en: 'Schedule', de: 'Zeitplan' },
 	my_templates: { en: 'My Templates', de: 'Meine Vorlagen' },
diff --git a/src/models/IntervalTemplate.ts b/src/models/IntervalTemplate.ts
new file mode 100644
index 0000000..699f543
--- /dev/null
+++ b/src/models/IntervalTemplate.ts
@@ -0,0 +1,70 @@
+import mongoose from 'mongoose';
+
+export interface IIntervalStep {
+  label: string;
+  durationType: 'distance' | 'time';
+  durationValue: number; // meters (distance) or seconds (time)
+}
+
+export interface IIntervalTemplate {
+  _id?: string;
+  name: string;
+  steps: IIntervalStep[];
+  createdBy: string;
+  createdAt?: Date;
+  updatedAt?: Date;
+}
+
+const IntervalStepSchema = new mongoose.Schema({
+  label: {
+    type: String,
+    required: true,
+    trim: true,
+    maxlength: 50
+  },
+  durationType: {
+    type: String,
+    required: true,
+    enum: ['distance', 'time']
+  },
+  durationValue: {
+    type: Number,
+    required: true,
+    min: 1
+  }
+});
+
+const IntervalTemplateSchema = new mongoose.Schema(
+  {
+    name: {
+      type: String,
+      required: true,
+      trim: true,
+      maxlength: 100
+    },
+    steps: {
+      type: [IntervalStepSchema],
+      required: true,
+      validate: {
+        validator: function(steps: IIntervalStep[]) {
+          return steps.length > 0;
+        },
+        message: 'An interval template must have at least one step'
+      }
+    },
+    createdBy: {
+      type: String,
+      required: true,
+      trim: true
+    }
+  },
+  {
+    timestamps: true,
+    toJSON: { virtuals: true },
+    toObject: { virtuals: true }
+  }
+);
+
+IntervalTemplateSchema.index({ createdBy: 1 });
+
+export const IntervalTemplate = mongoose.model<IIntervalTemplate>("IntervalTemplate", IntervalTemplateSchema);
diff --git a/src/routes/api/fitness/intervals/+server.ts b/src/routes/api/fitness/intervals/+server.ts
new file mode 100644
index 0000000..c8879a7
--- /dev/null
+++ b/src/routes/api/fitness/intervals/+server.ts
@@ -0,0 +1,58 @@
+import { json } from '@sveltejs/kit';
+import type { RequestHandler } from './$types';
+import { dbConnect } from '$utils/db';
+import { IntervalTemplate } from '$models/IntervalTemplate';
+
+export const GET: RequestHandler = async ({ locals }) => {
+  const session = await locals.auth();
+  if (!session || !session.user?.nickname) {
+    return json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
+  try {
+    await dbConnect();
+    const templates = await IntervalTemplate.find({ createdBy: session.user.nickname }).sort({ updatedAt: -1 });
+    return json({ templates });
+  } catch (error) {
+    console.error('Error fetching interval templates:', error);
+    return json({ error: 'Failed to fetch interval templates' }, { status: 500 });
+  }
+};
+
+export const POST: RequestHandler = async ({ request, locals }) => {
+  const session = await locals.auth();
+  if (!session || !session.user?.nickname) {
+    return json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
+  try {
+    await dbConnect();
+    const data = await request.json();
+    const { name, steps } = data;
+
+    if (!name || !steps || !Array.isArray(steps) || steps.length === 0) {
+      return json({ error: 'Name and at least one step are required' }, { status: 400 });
+    }
+
+    for (const step of steps) {
+      if (!step.label || !step.durationType || !step.durationValue) {
+        return json({ error: 'Each step must have a label, durationType, and durationValue' }, { status: 400 });
+      }
+      if (!['distance', 'time'].includes(step.durationType)) {
+        return json({ error: 'durationType must be "distance" or "time"' }, { status: 400 });
+      }
+    }
+
+    const template = new IntervalTemplate({
+      name,
+      steps,
+      createdBy: session.user.nickname
+    });
+
+    await template.save();
+    return json({ template }, { status: 201 });
+  } catch (error) {
+    console.error('Error creating interval template:', error);
+    return json({ error: 'Failed to create interval template' }, { status: 500 });
+  }
+};
diff --git a/src/routes/api/fitness/intervals/[id]/+server.ts b/src/routes/api/fitness/intervals/[id]/+server.ts
new file mode 100644
index 0000000..a198630
--- /dev/null
+++ b/src/routes/api/fitness/intervals/[id]/+server.ts
@@ -0,0 +1,103 @@
+import { json } from '@sveltejs/kit';
+import type { RequestHandler } from './$types';
+import { dbConnect } from '$utils/db';
+import { IntervalTemplate } from '$models/IntervalTemplate';
+import mongoose from 'mongoose';
+
+export const GET: RequestHandler = async ({ params, locals }) => {
+  const session = await locals.auth();
+  if (!session || !session.user?.nickname) {
+    return json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
+  try {
+    await dbConnect();
+    if (!mongoose.Types.ObjectId.isValid(params.id)) {
+      return json({ error: 'Invalid template ID' }, { status: 400 });
+    }
+
+    const template = await IntervalTemplate.findOne({
+      _id: params.id,
+      createdBy: session.user.nickname
+    });
+
+    if (!template) {
+      return json({ error: 'Template not found' }, { status: 404 });
+    }
+
+    return json({ template });
+  } catch (error) {
+    console.error('Error fetching interval template:', error);
+    return json({ error: 'Failed to fetch interval template' }, { status: 500 });
+  }
+};
+
+export const PUT: RequestHandler = async ({ params, request, locals }) => {
+  const session = await locals.auth();
+  if (!session || !session.user?.nickname) {
+    return json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
+  try {
+    await dbConnect();
+    if (!mongoose.Types.ObjectId.isValid(params.id)) {
+      return json({ error: 'Invalid template ID' }, { status: 400 });
+    }
+
+    const data = await request.json();
+    const { name, steps } = data;
+
+    if (!name || !steps || !Array.isArray(steps) || steps.length === 0) {
+      return json({ error: 'Name and at least one step are required' }, { status: 400 });
+    }
+
+    for (const step of steps) {
+      if (!step.label || !step.durationType || !step.durationValue) {
+        return json({ error: 'Each step must have a label, durationType, and durationValue' }, { status: 400 });
+      }
+    }
+
+    const template = await IntervalTemplate.findOneAndUpdate(
+      { _id: params.id, createdBy: session.user.nickname },
+      { name, steps },
+      { new: true }
+    );
+
+    if (!template) {
+      return json({ error: 'Template not found or unauthorized' }, { status: 404 });
+    }
+
+    return json({ template });
+  } catch (error) {
+    console.error('Error updating interval template:', error);
+    return json({ error: 'Failed to update interval template' }, { status: 500 });
+  }
+};
+
+export const DELETE: RequestHandler = async ({ params, locals }) => {
+  const session = await locals.auth();
+  if (!session || !session.user?.nickname) {
+    return json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
+  try {
+    await dbConnect();
+    if (!mongoose.Types.ObjectId.isValid(params.id)) {
+      return json({ error: 'Invalid template ID' }, { status: 400 });
+    }
+
+    const template = await IntervalTemplate.findOneAndDelete({
+      _id: params.id,
+      createdBy: session.user.nickname
+    });
+
+    if (!template) {
+      return json({ error: 'Template not found or unauthorized' }, { status: 404 });
+    }
+
+    return json({ message: 'Template deleted successfully' });
+  } catch (error) {
+    console.error('Error deleting interval template:', error);
+    return json({ error: 'Failed to delete interval template' }, { status: 500 });
+  }
+};
diff --git a/src/routes/fitness/[workout=fitnessWorkout]/+page.svelte b/src/routes/fitness/[workout=fitnessWorkout]/+page.svelte
index 0604a3d..25e4a31 100644
--- a/src/routes/fitness/[workout=fitnessWorkout]/+page.svelte
+++ b/src/routes/fitness/[workout=fitnessWorkout]/+page.svelte
@@ -342,16 +342,16 @@
 
 	<section class="quick-start">
 		<div class="quick-start-row">
+			<button class="start-choice-btn" onclick={startEmpty}>
+				{#if isApp}<Dumbbell size={18} />{/if}
+				<span>{t('start_empty_workout', lang)}</span>
+			</button>
 			{#if isApp}
 				<button class="start-choice-btn" onclick={startGps}>
 					<MapPin size={18} />
 					<span>GPS Workout</span>
 				</button>
 			{/if}
-			<button class="start-choice-btn" onclick={startEmpty}>
-				{#if isApp}<Dumbbell size={18} />{/if}
-				<span>{t('start_empty_workout', lang)}</span>
-			</button>
 		</div>
 	</section>