Stubborn arm fat can make it difficult to wear short-sleeved tops comfortably due to poor fit or poor self-image. Although you cannot spot-reduce fat from the body, you can lose arm fat by adopting a healthy lifestyle, committing to an exercise routine and eating a nutritious diet. Schedule cardio five times per week, and strength-training three times per week, to slim down your arms.
The skin also serves as a release point for heat. (See “Why Does My Face Turn Red When I Exercise?” for more on that.) When you exercise, your muscles generate a lot of heat, which you have to give up to the environment so your body temperature doesn’t get too high, Hackney says. The heat in the muscle transfers to the blood, which shuttles it to the skin; it can then escape into the atmosphere.