William Henry Bill Cosby, Jr. (born July 12, 1937) is an American stand-up comedian, actor, and author. Cosby's start in stand-up comedy began at the hungry i in San Francisco, and was followed by his landing a starring role in the 1960s television show I Spy. He was also a regular on the children's television series The Electric Company during the show's first two seasons.
4. Reverse Crunch: With this exercise you can strengthen your lower abdominal muscles. As everyone knows, working on lower abs is the most difficult part of any workout session. So, perform reverse crunches properly and tone your lower ab muscles: Lie straight on the floor and press your lower back to the floor.
this ab exercise strengthens and improves the stability of your core; Starting Position. lay your back on the ground or a fitness mat; brace the core the pull the abs to the floor; roll in the back, until only the lower back and hip have contact to the ground; your arms are stretched out above your head, so that your upper arms are right next to your ears