Newsstands are filled with magazines devoted to a wide range of physical activities and sports, from Muscle and Fitness to Runner's World.

书报摊上充斥着各式各样专门探讨体育信息活动及运动的杂志，从肌肉与健美，到跑者的世界应有尽有。

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Differences in lifestyle, muscle tissue, genetic makeup, and overall health all help determine your personal fitness level.

生活方式、肌肉组织、基因组成，以及整体健康的差异都是你的健康水平的决定性因素。

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Changing your routine will help build different muscle groups and will be beneficial to your overall fitness.

改变你的训练计划可以帮助你训练不同的肌肉群，这样有助于提高你全身的水平。

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He also built out his magazine publishing empire with titles that included Shape, Men's Fitness, Flex, Natural Health and Muscle and Fitness.

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Known for creating the Mr Olympia bodybuilding contest, Weider built a magazine empire that included publications like Muscle and Fitness, Shape and Men's Fitness.

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"That was a big switch physically, I had to try and do most of that in muscle so I got into a lot of weight training and fitness training, " he said.

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