The yoga block has served me better than any other tool for teaching. I have employed it for teaching about the core and for other interesting uses as well.
Hip, Hamstring, Groin, and Inner Thigh Mobility Exercises: Yoga
Does Yoga Build Strength? - Nicole Stone Yoga
bodyweight exercise Archives - Online Personal Trainer for Women
A Yoga Block Between The Thighs
Yoga for healthy knees - Aham Yoga Blog
Yoga Blocks Purpose: How to Use Yoga Blocks to Enhance Poses
Yoga for Strength-Building: Add Oomph to Chair Pose with These
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Mountain Pose With Block Between Thighs Yoga (Tadasana With Block
Tight inner thigh release with a yoga block - improve yoga poses