What you need to know to determine your optimal fitness plan Well-rounded workout plans generally include both weights and cardiovascular exercise. But physical changes that occur with aging raise questions about which type of exercise is best — and at what age — for reducing risks, such as falling, that come with the second half of life. While the weights vs. cardio question is a hot topic among experts in the fitness industry, the rest of us want to know which is better, too. Read on for the arguments for both sides to help you decide on your best plan. The Case for Cardio “The American College of Sports Medicine emphasizes cardio for all people at all ages,” says Irv Rubenstein, an exercise physiologist and founder of S.T.E.P.S., a science based fitness facility in Nashville, Tenn. “It not only improves cardiovascular health but also helps control blood sugar and cholesterol, which have become the big dogs in the fight against wellbeing.” The type of cardio exercise you choose is important in determining which benefits you gain, says Rubenstein. For example, biking and the elliptical trainer work well for heart health and quadriceps strength (which become weaker with age), but don’t benefit bone density as much as impact exercises such as walking or jogging. Cardio exercise, in general, is a must for 50+ people, says Rubenstein. In addition to its heart health and blood sugar controlling benefits, aerobic exercise helps improve brain functioning and memory, according to a 2013 study from the University of Texas at Dallas. Sedentary adults ages 57 to 75 who practiced aerobic exercise for one hour, three times a week for 12 weeks, increased blood flow to an area of the brain linked to superior cognition...