Fatigue from Isotonic and Isometric Training

Hi everybody. Sorry I haven’t posted here for several days. I was out of town and didn’t have Internet connection but now that I’m back everything is back to normal.

On the topic. Isotonic means you contract the muscle and the muscle fiber shortens like in regular workouts, isometric means you contract the muscle but the muscle fiber remains the same in length (ex. you do biceps curls, you curl half way, stop and hold it there).

It became apparent in a new study that doing isotonic contractions (concentric training) causes your muscle fibers to fail, while doing isometric (static, eccentric) training causes your central nervous system to fail.

This is important to remember as this way now you can train for either muscle or nervous system failure, or you can reconsider your workout to train for both types of failure during a single workout.