strains can effect more tissue than just the muscles. you have tendons and ligaments, connective tissue that glues them together.
that’s why advancing weights too fast can cause damage. it takes some serious damage to tear a muscle like some pro athletes (and unlucky amateurs) but fairly easy to hurt the tendon or tear the ligaments. those build slowly, and the older you get the slower they are. that’s where ‘strains’ get you.
Latest Answers