Yes.: Lots of physical activity, where you burn more calories than you take in, can lead to a catabolic state where it may be difficult to increase muscle mass. To increase muscle mass requires additional work to promote a more anabolic state, with resistance training and increased caloric/protein intake.
Answered 12/9/2013
5.7k views
Yes: You will need to eat more and do some resistance training, but hopefully you know this as a physical education instructor.
Answered 10/3/2016
5.7k views
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