카테고리 없음 thequestfor 2018. 7. 16. 17:55
201409. 22번. It’s true that before puberty, kids don’t gain the same muscle from lifting weights that a teen or adult would, but Dr. Avery Faigenbaum, a noted youth exercise specialist, points to studies in which children as young as six have benefited from strength training and says that, on average, kids show a 30 to 40 percent strength gain when they start lifting for the first time. Muscles ..
