Muscle Gain Guide: Build Lean Mass and Get Ripped Fast

Building lean muscle mass effectively involves a combination of high-density training and strategic supplementation like whey protein or creatine. Discover why women should lift weights for fat loss and how to maintain muscle while getting lean.

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How to Build Muscle by Flexing

Published Jul,08 2011 | By Jack Kaltmann

Flexing muscles is a form of isometric exercise where the muscle is contracted, or squeezed, for five to 30 seconds, without any adjacent joint movement. A common example of an isometric exercise is flexing the arm by squeezing the biceps muscles.

Jack Kaltmann is a Las Vegas-based writer with more than 25 years of professional experience in corporate communications. He is a published author of several books and feature articles for national publications such as "American Artist" and "Inside Kung-Fu." Kaltmann holds a Bachelor of Arts in English from Miami University and is a retired nationally certified personal trainer.