Many-to-Many Relationships
Level: Intermediate (score: 3)
Here's the reality: workouts are composed of multiple exercises, and the same exercise appears in different workouts.
For example:
- "Upper Body Day" includes: Bench Press, Pull Ups, Shoulder Press
- "Push Day" also includes: Bench Press, Shoulder Press
This is a many-to-many relationship - each workout has many exercises, and each exercise belongs to many workouts.