Before revision: Sweating in the Service of Science, Occupational Physiology Furthermore, it is said that he concluded that muscle growth can be attained by exerting 60% of existing muscle strength against a superior resistance for only seven seconds once a day, a fitness technique known as isometrics.
After revision: Furthermore, it is said that he concluded that muscle growth can be attained by exerting 60% of existing muscle strength against a superior resistance for only seven seconds once a day, a fitness technique known as isometrics.