Signs of heat stress can be confusing. Heavy sweating is a sign of heat exhaustion while no sweating is a symptom of heatstroke. Both are serious conditions and heatstroke can lead to death or permanent disability.
Fitness enthusiasts training in the summer sun are advised to learn heatstroke symptoms — no sweating, chills, confusion, dizziness and slurred speech —as well as heat exhaustion symptoms — heavy sweating, nausea, fatigue, muscle cramps, and fast and shallow breathing.
Outdoor exercisers also need to dress appropriately for warm weather workouts. While it's tempting to wear heavy clothing to release water weight, inappropriate clothing can lead to heat stress.
Wickable shirts are one item designed to keep outdoor exercisers cool. These specially designed fabrics pull moisture away from the body and allow the skin to breathe easier.
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The HVAC Pulse Synergy Singlet from Brooks Running is a lightweight sleeveless top with 40+ UV protection. The shirt is a moisture moving mesh to wick sweat away from the body. The top also has silver fibers embedded in the fabric to disperse heat.
Available in white, blue and red for men, and white and blue for women. $38 at BrooksRunning.com.