Although it sometimes feels as though summer never comes to San Francisco what with all the wind and the fog, there are those blessed days when the sun shines and the temperatures rise just like in the rest of the country. What can you do to make your workouts work in the summer heat? Exercise itself raises your body temperature, and working out in the heat puts extra stress on your cardiovascular system. So naturally you sweat more, and to dissipate heat, more blood circulates through your skin. But if you continue to exercise in high heat and humidity, you could suffer heat cramps, heat exhaustion, or more serious heatstroke.
To avoid these problems, take it easy at first when the temperature rises. Remember, your body isn't used to the heat.
Always drink lots of fluids, especially water, before, during, and after your workout, even if you don't feel thirsty. And sports drinks are specially formulated to replace the sodium, chloride, and potassium that you lose through sweating.
Wear loose-fitting, "breathable" clothing, sunscreen, and a hat or visor, and take plenty of breaks.
If you customize your workouts for warmer weather, you'll be able to maintain your level of fitness, no sweat. (Well, not literally!)