When you're chained to your desk until midnight to meet a deadline or are out even later having fun, you expect to be low on energy and feel it at the gym the next day. But when you bank quality beauty sleep yet every minute on the elliptical seems like an hour, it just doesn't make sense.
The next time you feel as if you're dragging yourself through quicksand, consider these six things that have nothing to do with slumber but could be just the thing that's zapping your zing.
(Note: If none of these apply to you and you're still exhausted, see a doctor to rule out other health issues such as chronic fatigue syndrome.)
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Hot summer days mean you sweat more—and probably need more water than you're sipping, especially if you're exercising outdoors. "If you take a drink of water and find yourself downing the whole glass all at once, you're likely dehydrated," says Jacob Teitelbaum, M.D., a board certified internist and owner of From Fatigued to Fantastic. Since even slight dehydration can cause a drop in energy levels, head off the problem by making H2O your go-to all day. Then drink 2 cups of a cool beverage two hours prior to working out in hot weather, the National Strength and Conditioning Association recommends.
RELATED: If you struggle to sip agua, experiment with a few ways to make drinking water taste better.