strength · bodyweight
Towel Isometric Curl
Loop a towel under your foot and pull hard — biceps burn with no weight.
3 × 30–45 sec 8 minrest 60s
Equipment
bodyweight
Rest
60s between sets
Primary muscles
biceps
Also works
forearms
How to do it
- Loop a towel under one foot, hold both ends in one hand.
- Curl the arm hard while pressing the foot down.
- Hold peak tension for the prescribed time.
- Switch sides.
Form cues
- ✓Brace core
- ✓Full range of motion
- ✓Slow, controlled tempo
Common mistakes
- ✗Rushing reps
- ✗Losing tension at the top
Progressions
- Master form → add reps → progress to harder variation
