The human body has an incredible number of muscles and muscle fibers that can be trained, built, and improved to increase athletic performance. However, it is critical for one to exercise each group of muscles so that no single group is left as a weak link. Having imbalanced muscles can lead to various different types of injuries, so it is best to simply keep a workout program well rounded and leave no stone unturned. The following groups are the main ones that are most important to build for athletics and weight lifting. The first group (from the top down) is the Chest Group. This group of muscles includes the pectoralis major and pectoralis minor, which are often referred to as "pecs". These muscles are used in pushing exercises such as, or course, push-ups. They can also, however, be strengthened by ...

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