Wall sits strengthen your quadriceps, knee caps, and quadricep tendons. Doing hamstring curls boosts knee strength and lowers stress and injury risk. Clam shells target your gluteus medius and minimus ...
For FITBOOK, yoga instructor Nina Ponath conducted a special self-test: wall sit every day for 14 days. She reveals how much willpower she needed to persevere and what the daily wall sit did to her ...