How Do I Safely Exercise in the Sun?
After a long winter of rain, snow, and ice—and more than a few cancelled
workouts—getting outside to move your body is a physical and psychological boon. The sun
stimulates production of vitamin D, an
essential nutrient for bone development, and serotonin, a neurotransmitter that is partly
responsible for our feelings of emotional contentment. So, take advantage of the sun’s
rays, but exercise a few precautions and you’ll have an energising rather than
exhausting summer fitness routine.
Timing is everything
Plan your outdoor workouts for early morning or late afternoon. The sun is at its hottest
from 10 a.m. to 4 p.m., putting you at risk for dehydration, sunburn, and heat-related
conditions. If the temperature climbs to 90°F (32°C) or higher, substitute your
planned strenuous activity with a more moderate one. Be strategic when choosing your running,
walking, and biking routes; look for shaded bike paths, parks, and trails.
Good fashion sense
Start your day by slathering on sunscreen labelled SPF 15 or higher. Sports sunscreens
provide additional water- and sweat-proof protection—especially important for swimmers,
kayakers, and other water-bound sports enthusiasts. Dress in light-coloured clothing to
deflect the sun’s rays. A tightly woven shirt will keep out vexing UV rays and should
cover your back, shoulders, and neck. Make sure your clothing is loose fitting so sweat has a
chance to evaporate, keeping you cool and comfortable. Don’t forget your helmet, hat, or
bandana. Top off your outfit with UV-protection sunglasses.
Drink up!
Sun mixed with humidity can be a dangerous combination if you add strenuous exercise.
Normally a hot body cools itself by sweating. When humidity levels rise, sweat doesn’t
evaporate as quickly and your body temperature can spike dangerously. This can lead to heat
cramps, heat exhaustion, and, worst-case scenario, heatstroke. Staying hydrated is your best
defence. Adults of average weight should drink about 3 litres of water a day. People of
above-average weight should drink additional liquids. Physically active school-age children
should drink 1.5 to 2 litres a day.
During your workout, if you feel weak, dizzy, or nauseated—stop! Get out of the sun
and hydrate, hydrate, hydrate. Seek out a shady tree and a tall glass of iced lemonade, and
put off your workout for another day. This is one situation where procrastination is a good
thing.