12 ways one type of exercise is the closest thing to a miracle drug we have

woman running outdoors fall park leaves exercise run jog

Want an all-natural way to lift your mood, improve your memory, and protect your brain against the decline that comes with aging?

Get moving.

Exercises that get your heart pumping and sweat flowing — known as aerobic exercise, or "cardio" — have significant and beneficial effects on the brain and body, according to a wealth of recent research, including a new study published Monday.

"Aerobic exercise is key for your head, just as it is for your heart," according to an article in a Harvard Medical School blog. Here are some of the ways cardio is such a boon for our bodies.

DON'T MISS: 18 'healthy habits' you should give up in 2018

Cardio tones your muscles.

It was initially believed that when it comes to building muscle, cardio paled in comparison to exercises like resistance training, which are designed to help you gain strength. But a recent review of 14 studies published in the journal Exercise and Sport Sciences Reviews found that on average, men who did 45 minutes of moderate to intense cardio 4 days a week saw a 5%-6% increase in leg muscle size.

“Aerobic exercise, if done properly, can lead to as much muscle growth as you’d expect with resistance exercise,” Ball State University exercise scientist Matthew Harber, who authored the study, told Men's Fitness.

It also raises your heart rate, improving heart and lung health.

Aerobic workouts, especially swimming, train your body to use oxygen more efficiently, a practice that gradually reduces your resting heart rate and your breathing rate — two important indicators of cardiovascular health.

A 2008 study compared blood pressure, cholesterol levels, and other heart health metrics across close to 46,000 walkers, runners, swimmers, and sedentary people. The researchers found that the regular swimmers and runners had the best metrics, followed closely by the walkers.

It may even help reverse some heart damage from normal aging.

Many of us become less active as we get older. Over time, this can lead some muscles in the heart to stiffen. One of those at-risk muscles is in the left chamber of the heart, a section that plays a key role in supplying the body with freshly-oxygenated blood.

A recent study split 53 adults into two groups, one of which did two years of supervised exercise four to five days per week while the other simply did yoga and balance exercises. At the end of the study, published in January in the journal Circulation, the higher-intensity exercisers saw significant improvements in their heart's performance. Those results suggest that some stiffening in the heart can be prevented or even reversed with regular cardio.

"Based on a series of studies performed by our team over the past 5 years, this 'dose' of exercise has become my prescription for life," Benjamin Levine, the author of the study and and a professor of internal medicine at the University of Texas Southwestern, said in a statement.

See the rest of the story at Business Insider