Last but not least for how to lose arm fat: Stand with your feet together and a dumbbell in each hand, palms facing inwards towards your body. With a slow and controlled motion, raise your arm out from your sides until they’re parallel with the floor. As you exhale, slowly lower your hands back to your sides. You should be able to see your hand in your peripheral vision, says Lagree: Your arm isn’t directly out to the side, but slightly forward. Lagree recommends doing two sets of 10-12 reps on each side. Next, find out the 14 things that happen to your body when you begin a strength training workout.
1. It strengthens the heart. The heart is a muscle. Like other muscles, its performance improves when it's regularly challenged by exercise. The heart responds to exercise by becoming stronger and more efficient. Strengthening the heart muscle can help ward off heart disease -- the leading cause of death in the United States, according to the U.S. Department of Health and Human Services -- even in early childhood.
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.