評論
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Can you: Carry large containers of milk or water in each hand, without feeling strain?
你能否：兩只手拎著大罐牛奶或水，而且不覺得特別累？
Being able to tote a gallon (which weighs about 8 pounds) isn’t just about the size of your biceps. That strength also comes from your shoulders, back, chest, knees, and more—all important muscle groups to keep strong as you get older. A lack of strength can make you more vulnerable to injury, as well as conditions like arthritis, osteoporosis and even depression and dementia. One Tufts University study found that after older adults with arthritis followed a strength training program for 16 weeks, their pain levels decreased by 43 percent.
能夠提起一加侖（大約8磅）的東西不僅僅和你二頭肌的大小有關。用到的力量還來自于你的肩、背、胸、膝蓋等地方，隨著 你年齡的增長，要保持這些重要的肌肉群強壯。缺乏力量會讓你更容易受傷，還更容易患關節炎，骨質疏松癥，甚至是抑郁和癡呆。一項塔夫茨大學的研究表明，那些患關節炎的中老年人進行16周的力量訓練后，疼痛的水平會降低43%。
