New research has found that on top of all of the other health benefits you already know about exercise, it can help with aging, too.

But not all exercises are created equal — at least according to a new study in the European Heart Journal.

According to this study, you should add endurance and high-intensity interval training (HIIT) to your routine. These exercises keep your heart rate up and can keep your cells younger for longer. The researchers determined this by measuring the structures at the end of chromosomes, known as telomeres.

Thanks to older research, we know that our telomeres start to shrink as we age. Also, older people with longer telomeres don’t experience vascular aging as rapidly as people with shorter ones. This means their veins are generally in better shape and they’re less at risk for conditions like heart disease and stroke.

Details of the study

• The study followed 124 people who exercised for 45 minutes, three times a week, for 26 weeks.
• The participants were split into four groups: the aerobic group (continuous running), the HIIT group (4x4 interval program), the resistance group (eight machine-based exercises), and the control group (no exercise at all).
• At the end of the 26 weeks, those in the control and resistance groups had no change in telomere length. However, those in the aerobic and HIIT groups saw a "two-fold" increase in length.

The researchers also found that the people in the aerobic and HIIT groups experienced more telomerase activity. This is the process that caused their chromosomes to become longer.

While the study didn’t find anti-aging benefits from resistance training, it doesn’t mean there’s no benefit to weightlifting. As you get older, your body will have decreased muscle mass. This can increase your risk for:

• falls
• fractures
• impaired function
• osteoporosis
• death

If anything, treat this study as a reminder to maintain a balanced approach to exercise. Try a mix of aerobic and resistance: Run on Tuesdays and lift weights on Thursdays.

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