If you’ve been working out regularly, you’ve already discovered it: No matter how good or bad you feel at any given moment, exercise will make you feel better. And it goes beyond just the “runner’s high”—that rush of feel-good hormones known as endocannabinoids. In a study published in Medicine and Science in Sports and Exercise, researchers found that even a single bout of exercise—30 minutes of walking on a treadmill—could instantly lift the mood of someone suffering from a major depressive order.
And even on those days when you have to force yourself out the door, exercise still protects you against anxiety and depression, studies have shown. Moderate exercise may help people cope with anxiety and stress even after they’re done working out. A 2012 study in the Journal of Adolescent Health proved that just 30 minutes of running during the week for three weeks boosted sleep quality, mood, and concentration during the day.
You know that exercises burns calories while you’re working out. The bonus is that when you exercise, the burn continues after you stop. Studies have shown that regular exercise boosts “afterburn”—that is, the number of calories you burn after exercise. (Scientists call this EPOC, which stands for excess post oxygen consumption.) That’s kind of like getting a paycheck even after you retire.
And you don’t have to be sprinting at the speed of sound to get this benefit. This happens when you’re exercising at an intensity that’s about 70 percent of VO2 max. (That’s a little faster than your easy pace, and a little slower than marathon pace.)
It’s long been known that running increases bone mass, and even helps stem age-related bone loss. But chances are, you’ve had family, friends, and strangers warn you that “running is bad for your knees.” Well, science has proven that it’s not. In fact, studies show that running improves knee health, according to Boston University researcher David Felson in an interview with National Public Radio.
“We know from many long-term studies that running doesn’t appear to cause much damage to the knees,” Felson said. “When we look at people with knee arthritis, we don’t find much of a previous history of running, and when we look at runners and follow them over time, we don’t find that their risk of developing osteoarthritis is any more than expected.”
Worried about “losing it” as you get older? Working out regularly will help you stay “with it.” A December 2012 study published in Psychonomic Bulletin & Review concluded that the evidence is insurmountable that regular exercise helps defeat age-related mental decline, particularly functions like task switching, selective attention, and working memory.
Studies consistently found that fitter older adults scored better in mental tests than their unfit peers. What’s more, in stroke patients, regular exercise improves memory, language, thinking, and judgment problems by almost 50 percent. The research team found “significant improvements” in overall brain function at the conclusion of the program, with the most improvement in attention, concentration, planning, and organizing.