Do you: Feel energized 14 hours after waking up? (If you woke up at 7 a.m., you should still feel awake and active at 9 p.m.).
Exercise is a known energy booster, and if you feel completely zonked at the end of the day, chances are an overly sedentary lifestyle is at least partly to blame. One large study, which analyzed 70 papers on exercise and fatigue that involved more than 6,800 people, found that sedentary people who followed a regular exercise program had less fatigue than people who didn’t work out, according to WebMD.
Can you: Carry large containers of milk or water in each hand, without feeling strain?
Being able to tote a gallon (which weighs about 8 pounds) isn’t just about the size of your biceps. That strength also comes from your shoulders, back, chest, knees, and more—all important muscle groups to keep strong as you get older. A lack of strength can make you more vulnerable to injury, as well as conditions like arthritis, osteoporosis and even depression and dementia. One Tufts University study found that after older adults with arthritis followed a strength training program for 16 weeks, their pain levels decreased by 43 percent.