Always remember to drink water when you exercise.

Drink before, during, and after your walk (1-1.5 cups of water for a 20 minute walk). Every system in your body depends on water. Lack of water can lead to dehydration, which can drain your energy and make you feel tired. If you exercise or engage in any activity that makes you sweat, you need to drink extra water to compensate for the fluid loss.

While thirst is generally a good indicator of hydration, summertime heat combined with physical activity can lead to dehydration and other related illnesses. This Mayo Clinic article provides information on ways to stay cool while exercising in the summer. Aim for 15-20 ounces of water two hours before exercise and have a water bottle with you during workouts.

Drink up!