Sitting isn’t good for strengthening butt muscles, unless you have nothing to sit on. Try this yoga exercise, similar to the above squat, for strength:
♧Press your back into a wall.
♧Move your feet about hip-width apart.
♧Cross your arms, lifting them away from your
body.
♧Slowly slide your back down the wall until
your knees are at a 90-degree angle. Do not
let your knees go past your toes and keep
your knees in line with your toes.
♧Hold for 30 seconds.
Make this harder by doing this pose without the wall. This is called Chair Pose, or Utkatasana, in yoga. Stand with your feet hip-width apart, or a little closer together. Sweep your arms up straight by your ears. Sit down slowly into your chair in the air. Make sure you can still see your toes in front of your knees.