The M3 X-Strap is primarily used for TORSO SIDE CRUNCH & SIDE TWIST and GIANT CRUNCH. The TORSO SIDE CRUNCH & SIDE TWISTS are among the top 5 best exercises in the world to strengthen, tighten, and tone the obliques and waist muscles. If you don't want a smaller and tighter waist, do not get the M3 X-strap.
Only compatible with M3 models, including:
- M3
- M3S
- M3K
- M3X
- EVO