About BTL Industries. Founded in 1993, BTL Industries is a privately owned developer and manufacturer of medical and aesthetic equipment. BTL currently has over 900 employees and direct offices in more than 51 countries. BTL Aesthetics, a division of BTL, has revolutionized the way to non-invasively remove adipose tissue; it currently ranks 2nd among the non-invasive body shaping and tightening manufacturers globally.
A Well-Defined Chest Routine. 1  1. Do exercises that work the whole chest such as pushups, barbell bench presses, dumbbell bench presses, dumbbell flyes and cable flyes. Perform these exercises to trigger muscle fibers throughout your pectoral muscles and get an all-around stronger, more defined chest.
Chest Muscles. The push-up exercise requires the recruitment of many muscles, but there are two primary movers. The chest muscles are the first primary movers and include your pectoralis major and minor. Imagine a Japanese hand fan rotated 90 degrees with the top of the fan pointing toward your sternum and the bottom of the fan pointing out to you upper arm bone -- the humerus.