Arm-strengthening exercises alone will not give you fat-free arms. Rather, you need to lose excess fatty layers surrounding muscles with cardio. Cardiovascular exercise burns off calories for weight-loss all over the body, including the arms. Schedule five 45- to 60-minute cardio sessions per week of activities that raise the heart rate such as jogging, running, hiking, biking, swimming or step aerobics. Work out at a moderate pace such that you are working up a sweat but can still carry on a light conversation to avoid burning out 10 minutes into your session.
Exercise has long been correlated with a longer life, but it’s only recently started to become clear why this might be. Studies, like a new one in the journal Preventive Medicine which found that exercise is linked to longer caps at the ends of chromosomes, have helped flesh this out a bit more. These caps, called telomeres, naturally shorten as we age, with each cell division. People who live a long time have telomeres that are in better shape than those who don’t—but there’s a lot we can do to affect the rate at which they shorten over the years. The team behind the new study looked at data from CDC's National Health and Nutrition Examination Survey, and found that for people who exercised regularly, their telomeres were 140 base pairs longer on average than sedentary people's. Which correlates to being years “younger” than their sedentary peers.
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