Even a slightly elevated heart rate may increase your risk of diabetes. In a 20-year study, people with resting heart rates above 80 beats per minute (born) were almost five times more likely to develop the disease. Resting heart rates in this range may interfere with your body’s use of insulin. If your resting heart rate is over 80 bpm, lower it with 3 days of interval training a week.

The usual treatment for sleep apnea is a CPAP mask, which increases air pressure to keep your airway open. But Brazilian researchers found that simple throat exercises may also help treat sleep apnea. People who performed the exercises for half an hour a day reduced the severity of their condition by 39 percent in 3 months. The workout strengthens your upper airway, so it won’t collapse during sleep. If you have moderate sleep apnea, talk to your doctor about trying the exercises.

Ultraviolet rays aren’t the only way the summer sun can injure your eyes. Some researchers found that when contact-lens solution is stored for several weeks at 60°C—equivalent to the inside of a parked car on a hot day—it loses its ability to kill the microbes that may be lurking on your lenses or in your storage case. As a result, you risk infecting your eyes with bacteria and fungi. Research shows that temps as low as 30°C can be hot enough to decrease the disinfecting power of lens solution, so always stow the stuff in an air-conditioned room.