If you're feeling sluggish, don't reach for the coffee or other caffeinated beverages. Instead, try drinking more water -- especially if your fatigue is caused by working out.

Always drink plenty of fluids before, during and after exercise. Dehydration can result in premature fatigue as well as a loss of balance and coordination skills. Also, do not rely on thirst as an indicator for when you should consume fluids. Drink 3 to 6 ounces of water every 10 to 15 minutes of exercise to make up for the body fluids lost through sweating.