Cardio is a shorthand term for aerobic exercise. Aerobic exercise is comprised of activities that tend to improve the body's utilization of oxygen.

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How can I lose muscle mass in my quads and ham strings (thighs?)

I would really appreciate the help on how to lose muscle mass in the thigh area? Ever since I recovered from weight loss (40kg back up to 46kg, age 20, female, 1.66m), I started taking lysine and ...
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Need help dropping body fat to 8-12%? [duplicate]

So I am a 16 yr old young male nearing 17, about 160 Ibs, about 6'0, and in the 13-15% body fat range. I'd like to get down to 8-12% instead. Currently, I train my chest, traps, triceps, and legs ...