Workout Scaling Options Matrix

Create a scaling options matrix for this workout:

Original Workout (Rx): [FULL WORKOUT]
Intended Stimulus: [DESCRIPTION]
Time Domain: [TARGET TIME]
Energy System: [AEROBIC/ANAEROBIC/MIXED]

Provide scaling for:
1. Fitness Level Scaling (Rx+, Rx, Scaled, Beginner)
2. Movement Substitutions for each exercise
3. Load percentages relative to Rx
4. Rep scheme modifications
5. Equipment alternatives (home gym options)
6. Injury modifications (shoulder/knee/back friendly)
7. Pregnancy modifications
8. How to know which scale is right for each athlete