diff --git a/backend/users/migrations/0004_alter_athletefile_file.py b/backend/users/migrations/0004_alter_athletefile_file.py
new file mode 100644
index 0000000..d90de03
--- /dev/null
+++ b/backend/users/migrations/0004_alter_athletefile_file.py
@@ -0,0 +1,20 @@
+# Generated by Django 4.0.8 on 2025-04-01 16:01
+
+from django.db import migrations, models
+import users.models
+import users.validators
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0003_user_specialism'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='athletefile',
+            name='file',
+            field=models.FileField(upload_to=users.models.athlete_directory_path, validators=[users.validators.FileValidator(allowed_extensions='', allowed_mimetypes='', max_size=5242880)]),
+        ),
+    ]
diff --git a/backend/workouts/migrations/0002_alter_exerciseinstance_number_and_more.py b/backend/workouts/migrations/0002_alter_exerciseinstance_number_and_more.py
new file mode 100644
index 0000000..dd57cb0
--- /dev/null
+++ b/backend/workouts/migrations/0002_alter_exerciseinstance_number_and_more.py
@@ -0,0 +1,24 @@
+# Generated by Django 4.0.8 on 2025-04-01 16:01
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('workouts', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='exerciseinstance',
+            name='number',
+            field=models.IntegerField(validators=[django.core.validators.MinValueValidator(1), django.core.validators.MaxValueValidator(999)]),
+        ),
+        migrations.AlterField(
+            model_name='exerciseinstance',
+            name='sets',
+            field=models.IntegerField(validators=[django.core.validators.MinValueValidator(1), django.core.validators.MaxValueValidator(999)]),
+        ),
+    ]
diff --git a/backend/workouts/models.py b/backend/workouts/models.py
index 22bffec..ab9716c 100644
--- a/backend/workouts/models.py
+++ b/backend/workouts/models.py
@@ -7,6 +7,7 @@
 from django.core.files.storage import FileSystemStorage
 from django.conf import settings
 from django.contrib.auth import get_user_model
+from django.core.validators import MaxValueValidator, MinValueValidator
 
 
 class OverwriteStorage(FileSystemStorage):
@@ -106,8 +107,13 @@ class ExerciseInstance(models.Model):
     exercise = models.ForeignKey(
         Exercise, on_delete=models.CASCADE, related_name="instances"
     )
-    sets = models.IntegerField()
-    number = models.IntegerField()
+   
+    sets = models.IntegerField(
+        validators=[MinValueValidator(1), MaxValueValidator(999)]
+    )
+    number = models.IntegerField(
+        validators=[MinValueValidator(1), MaxValueValidator(999)]
+    )
 
 
 def workout_directory_path(instance, filename):