Perfect Butt! Lie flat on your back with your legs straight, and raise one leg straight in the air. Try not to bend your knee! Then, with your arms and hands flat on the ground, raise your hips off the ground. Hold for five seconds. Repeat ten to fifteen times with each leg. Feel the burn! This is one exercise for your butt you’ll feel right away! It also helps strengthen your core.
How to tone thighs in a month. Yes. Things that won't kill my knees.
Interval Training guide