Squat At The Wall With Exercise Ball, One-Legged muscles:Hamstrings, Quadriceps, Glutes auxiliary muscles:Lower Back, Calves, Adductors required:Exercise Ball optional:Backpack, Dumbbells (2), Kettlebells (2) fitness level:Challenging exercise type:Strength exercise benefits and how to do Squat At The Wall With Exercise Ball, One-Legged