5 Common Exercises You Should NEVER Do

health.msn.com — The test of time usually works. Futile fads like sweatboxes, vibrating belts, and most tips from the odd, ponytailed Tony Little have died out quickly enough. But a few bad exercises have persisted, and exercise physiologists don't see how these ineffective and sometimes dangerous maneuvers have survived. Mar 23, 2007 View in Crawl 4