Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

You may be worried about having enough energy to exercise. These tips can help.

And remember this: Exercise can actually give you more energy. After they start to be more active, most people feel more energetic throughout the day.

Eat a balanced diet

Unless you're exercising for an hour or more, you don't need to eat more calories or eat special foods for energy. A balanced diet will give most people the energy they need for physical activity.

  • Have a healthy snack like an apple, a whole-wheat bagel, or a handful of baby carrots if you're running low on energy. Nutrition bars are convenient, but be sure to read the label. They can be high in calories.

Drink plenty of fluids

Many people do not drink enough fluids to balance the loss from sweating from physical activity. To protect yourself from dehydration:

  • Drink plenty of water before, during, and after you are active. This is very important when it's hot out and when you do intense exercise.
  • Use a sports drink, such as Gatorade or Powerade, if you will be exercising for longer than 1 hour, and try to drink it at least every 15 to 20 minutes.
  • Avoid drinks with alcohol.
  • Don't take salt tablets. Most people get plenty of salt in their diets. If you are worried about replacing minerals lost through sweating, use a sports drink.
  • In extremely hot weather, take extra care to prevent dehydration. Exercise early in the day or later in the evening when it is cooler.
  • If you get dizzy, lightheaded, or very tired, stop exercising.

Make sure you're rested

If you feel weak and tired but aren't sick:

  • Try a short, brisk walk or similar activity. You may find that walking for 5 to 10 minutes actually gives you more energy.
  • Switch back and forth between rest and exercise. Gradually increasing your exercise may give you more energy.
  • Avoid medicines that can cause tiredness, such as tranquilizers and cold and allergy medicines.
  • Improve your diet. Eating a balanced diet may give you more energy. Don't skip meals, especially breakfast.
  • Stay away from alcohol, caffeine, and nicotine. They can actually make you feel tired.
  • Cut back on watching TV. Spend that time with friends, try new activities, or travel to break the cycle of tiredness.
  • Get a good night's sleep:
    • Try to get rid of all sounds and lights in your bedroom.
    • Don't eat just before you go to bed.
    • Use your bed only for sleeping and sex. Do not read or watch TV in bed.
    • Get regular exercise during the day, but avoid vigorous exercise within 3 or 4 hours of bedtime. Figure out what time of day works best for your sleep patterns. Outdoor exercise may help.

If you feel weak and tired because of a cold or the flu:

  • Get extra rest while you are ill. Let your symptoms be your guide.
    • If you have a cold, you may be able to go on with your usual routine and just get some extra sleep.
    • If you have the flu, you may need to spend a few days in bed.
  • Return slowly to your usual activities.
  • Drink plenty of fluids so you don't get dehydrated.

WebMD Medical Reference from Healthwise

Heart Rate Calculator

Ensure you're exercising hard enough to get a good workout, but not strain your heart.

While you are exercising, you should count between...


Heart Rate Calculator

Ensure you're exercising hard enough to get a good workout, but not strain your heart.

While you are exercising, you should count between...