Dwayne "The Rock" Johnson uses eccentric exercise to build muscle, his strength coach says. It involves lengthening muscles under tension, such as when you lower a weight (called a negative rep).
Dwayne ‘The Rock’ Johnson gained a noticeable amount of muscle mass for his role in 'The Smashing Machine' Jeff Kravitz/FilmMagic ; Pascal Le Segretain/Getty Dwayne "The Rock" Johnson maintains his ...
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