boost calorie burn and muscle elasticity. Expect longer recovery times after high-intensity workouts, so make sure to get enough sleep.
In Your 50s: Regular exercise remains a must, but ask your doctor for modifications if you have any chronic conditions. Varying your workouts or taking up a new sport will engage your brain as well as different muscles. Get in at least one or two high-intensity workouts a week and try to take active vacations that include favorite pastimes like biking, hiking or even walking tours.
In Your 60s and Beyond: Stay fit and strong to stay independent longer, and stay socially engaged by taking group classes. Stick with strength training, but consider using machines rather than free weights for more control. Water workouts may be easier on joints, too, especially if you have arthritis. But always keep moving. Try tai chi for flexibility and balance, and go dancing for fun and fitness.
The American Council on Exercise has more, including nutrition and sleep requirements by decade.