RECTUS ABDOMINISBruce Lee took advantage of his time by training his incredible abs unnoticed while sitting in boring meetings. Contract your rectus abdominis, exhaling as you let your muscles pull your shoulder blades up off the floor. Even when you perform a crunch correctly, your rectus abdominis begins the movement but your hip flexors cannot help but become involved, especially if you attempt to perform crunches quickly with nonmuscular momentum.
On that night a young, fast-talking heavyweight contender named Cassius Clay took on Sonny Liston, one of the most feared heavyweight champions in boxing history. When the fight started, Clay came out fast, firing his jabs and making Liston miss with wild swings. Liston surrendered between the sixth and seventh rounds, sitting on his stool--and Cassius Clay was the new heavyweight champion of the world.
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