All you need is a bench or a sturdy chair to do the step-up: Place your right foot firmly on the bench with your left foot directly under your left hip. Step up, straightening your right leg, bringing both feet completely onto the bench.
Lie flat on your back with your legs straight, and raise one leg straight in the air (try not to bend your knee) 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.