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