Heat and Exercise: Keeping Cool in Hot Weather

May’s start­ing out HOT HOT HOT. Don’t for­get water!

From Mayo Clinic

Exer­cis­ing in hot weather puts extra stress on your body. If you don’t take care when exer­cis­ing in the heat, you risk seri­ous ill­ness. Both the exer­cise itself and the air tem­per­a­ture increase your core body tem­per­a­ture. To help cool itself, your body sends more blood to cir­cu­late through your skin. This leaves less blood for your mus­cles, which in turn increases your heart rate. If the humid­ity also is high, your body faces added stress because sweat doesn’t read­ily evap­o­rate from your skin. That pushes your body tem­per­a­ture even higher.

When you exer­cise in hot weather, keep these pre­cau­tions in mind:

Watch the tem­per­a­ture. Pay atten­tion to weather fore­casts and heat alerts. Know what the tem­per­a­ture is expected to be for the dura­tion of your planned out­door activity.

Get accli­mated. If you’re used to exer­cis­ing indoors or in cooler weather, take it easy at first when you exer­cise in the heat. As your body adapts to the heat over the course of one to two weeks, grad­u­ally increase the length and inten­sity of your workouts.

Know your fit­ness level. If you’re unfit or new to exer­cise, be extra cau­tious when work­ing out in the heat. Your body may have a lower tol­er­ance to the heat. Reduce your exer­cise inten­sity and take fre­quent breaks.

Drink plenty of flu­ids. Dehy­dra­tion is a key fac­tor in heat ill­ness. Help your body sweat and cool down by stay­ing well hydrated with water. Don’t wait until you’re thirsty to drink. If you plan to exer­cise intensely or for longer than one hour, con­sider a sports drink instead of water. Sports drinks can replace the sodium, chlo­ride and potas­sium you lose through sweat­ing. Avoid alco­holic drinks because they can actu­ally pro­mote fluid loss.

Dress appro­pri­ately. Light­weight, loos­e­fit­ting cloth­ing helps sweat evap­o­rate and keeps you cooler. Avoid dark col­ors, which can absorb heat. If pos­si­ble, wear a light-colored, wide-brimmed hat.

Avoid mid­day sun. Exer­cise in the morn­ing or evening, when it’s likely to be cooler out­doors. If pos­si­ble, exer­cise in shady areas — or do a water work­out in a pool.

Wear sun­screen. A sun­burn decreases your body’s abil­ity to cool itself.

Have a backup plan. If you’re con­cerned about the heat or humid­ity, stay indoors. Work out at the gym, walk laps inside the mall or climb stairs inside an air-conditioned building.

Under­stand your med­ical risks. Cer­tain med­ical con­di­tions or med­ica­tions can increase your risk of a heat-related ill­ness. If you plan to exer­cise in the heat, talk to your doc­tor about precautions.

Heat-related ill­nesses are largely pre­ventable. By tak­ing some basic pre­cau­tions, your exer­cise rou­tine doesn’t have to be side­lined when the heat is on.