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question

Why do I feel exhausted and sick during exercise?

Jonathan Penney
Jonathan Penney on behalf of National Academy of Sports Medicine
Fitness
answer

If your body is feeling sick and exhausted during exercise then more than likely you are experiencing signs of dehydration.  Many individuals do not get enough water so be sure to drink and drink often.  Striving to drink a glass of water each hour of your workday which will result in 64 ounces of water keeping your body nice and hydrated!

 

Wendy Batts
Wendy Batts on behalf of Sharecare Fitness
Fitness
answer
A lot of factors can contribute to why you may feel ill during exercise. The first things to check are nutrition, hydration and energy levels.

Nutrition: do you have fuel in the tank? A lot of exercisers think you’re supposed to work out on an empty stomach and this isn’t true. So if you go into a workout with no fuel on board, this can possibly cause you to feel bad and perform poorly. Did you eat TOO much before a workout? The opposite can be true sometimes as well. Working out with full bellies can be counterproductive to how you feel during a workout.

Hydration: are you drinking enough water throughout the day and during the workout? Slight to moderate hydration can lead to drops in exercise performance.

Energy levels: How are you feeling overall? Are you fighting a cold? Are you getting enough sleep? Are you just flat-out tired from a rough day at work? All of these things can contribute to feeling exhausted and sick.

If fatigue may seem like it’s coming from something other than your daily habits, please check with your healthcare provider ASAP because a more serious medical condition could be underlying your exercise induced exhaustion, nausea, etc.
Dr. Michael Roizen, MD
Dr. Michael Roizen, MD
Internal Medicine
answer
You are probably feeling exhausted and sick during exercise due to dehydration or not having enough water to read a newspaper through your pee. Our bodies are made of about 75% water, and levels have to be maintained to function properly. Your body loses water through respiration, urination, and exercise. Drink 64 ounces a day. Drink more with intense exercise.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.