Why do I feel tired and sleepy after aerobics?
490596
Have you been exercising consistently?  If you are just starting out, then you will feel exhausted for a couple of weeks.  Your body will adapt.  And even though you eat well, you should take a good multi-vitamin.
737742
1. could be your body type\n2. could be your food\n3.could be the fact that you don't let your body rest\n4.could be the way you do your exercise (fast, slow, how many repetitions)\n5.could be the time (maybe you just started )\nI recommend you not to kill yourself working out too much and go check with a docotor if it's ok what you doing :)\n\ngood luck
308431
Yeah, you didn't cool down properly. Drink plenty of water, don't stop moving right after the exercise (as in, don't go to sleep), and make sure you're getting enough electrolytes, vitamins and protein.
249022
no "physical" energy is lost ihe bike is there, your there, etc..\n\nyou become tired due to buildup of acids in your muscles . lack of oxygen and hydration.
576793
Are you having some kind of small meal or snack before? It could be that you are bottomed out on your blood sugar levels and that would make you very tired during a workout. Also, a 2 hour intensive workout is pretty long. You may wish to have  some Gatorade after one hour and I bet that would keep you going during the second hour. just as you can drive very far on an empty tank, your body needs fuel too.
99570
anemia..insomnia...diabetes...\n.infections (flu...etc)..low metabolism >>>>>>>>>\n\nTackling fatigue\n\nFirst and foremost, you need to ensure that you lead a healthy life. This means a good diet, exercise and plenty of sleep. \n\nVitamins and minerals are necessary for many of the body's processes, and a healthy diet ensures your body can function at its best. \n\nIt may sound strange, but lack of exercise can increase feelings of fatigue. If you're not used to doing exercise, long walks are a good way to start. Exercise that involves all the major muscle groups is recommended, eg swimming...\nif it continues...consult a doctor! besT of luck
724742
When doing vigourous exercise, the body cannot keep up with the amount of oxygen needed. So it carries a form of respiration which does not require oxygen. After the exercise however you have a oxygen dept. This means that even after you finish exercising you are still breathing heavily as you body needs oxygen to nuetralise the latic acid which is produced during anaerobic respiration (latic acid is the reason your muscles hurt while exercising)
1057773
being that your blood is pumping, it causes to to become more  awake and it harder to fall asleep, i had the same prob when i exercised at night.
771901
Well, you may not feel effects at the moment but if you continue this habit then you might start feeling tired. Not to mention that it's bad on your eyes, wrists, and if your on the computer all the time, it only tells me your not out doing other things that you could be doing like exercising.
656464
With vigorous exercise, your muscles use anerobic energy and build up lactic acid.  That is what causes the pain.  Rest for a bit, the lactic acid gets reconverted to other forms of energy, and it doesn't get tired anymore.
318689
I had that problem once and it was my caffine intake. I was drinking so much soda that it made me tired in that way. Not sure what your habits are but try drinking water. Its incredible how great it makes you feel if you drink enough. Try water for a week or so.
976506
Red bull contains caffiene, which is a stimulant - this will increase your heart rate and blood pressure. Vigorous exercise, such as a workout, will also increase your heart rate and blood pressure.\n\nAdd the two together and, in some people - especially those with heart problems, it may increase the heart rate and/or blood pressure beyond what the body can cope with. If someone has died from this combination, it is most likely that it was because of an underlying heart problem.\n\nI wouldn't worry too much about being tired after a workout - you may feel physically tired, but often doing exercise will make you more mentally alert. Therefore if you workout, have a bit of a break (20 mins or so) to let your body physically recover, you should actually end up feeling more awake then you did beforehand!
1029670
it woldnt make sense to workout if it doesnt do anything for u if ur still tired
32464
If you feel sleepy after eating, particularly after sweet or bakery products, you are normal. Eating sugary foods causes your brain to make large amounts of the neurotransmitter, serotonin, that makes people fall asleep naturally at night. \n\nEating sugary foods or those made from flour, such as bakery products or pastas, causes blood sugar to rise higher than normal. This causes your pancreas to release large amounts of insulin, which drives one of the protein building blocks called tryptophan from your bloodstream into your brain, where it is converted to serotonin that makes you feel sleepy. \n\nMany people can avoid feeling sleepy after eating by restricting foods high in sugar and flour. When it is important for you to be alert, eat foods that do not cause a high rise in blood sugar, such as vegetable salads, nuts, seeds, meat, fish and chicken.
139220
Hmm, I always get tired after eating -- all that chewing wears me out! :)\n\nGenerally speaking, a big meal/ feeling of being full makes a lot of people tired. (I like to nap after dinner, and Im pretty young) \n\nDo you feel tired after eating a small meal? It's usually only the big meals that make us tired. Also, make sure your meal is healthy and well-balanced. Try taking a nice walk around outside for a bit, to get the blood flowing a bit while you digest. Coffee (small cup, with just a bit of caffeine) after eating may help (and very yummy! :)\n\n\n\nBut if you think it is MAJOR fatigue -- like passing out or something, you should ask your doctor, they can run blood tests and such to help you figure it out.\n(If this seems to be a very serious problem, that just came up recently and suddenly, you'll want to get it checked out ASAP in case its a sign of some more sersious)
394777
Usually through exercise.  The better shape you're in, the more energy you have.  Kind of ironic, isn't it?  When you're out of shape, you don't feel like exercising due to lack of energy.
1050637
you're probably anaemic. get your blood tested and take iron supplements (not more than one pill a day) if required. if your iron is down, it diminishes the oxygen carrying capacity of the blood thus explaining the tiredness.\n also, drink more water. the lower the water intake, the lower the recycling of water and higher the occurance of shortness of breath.\n for instant energy, glucose helps...but it only provides a short burst of energy.\n what you also need 2 do is to build your stamina so you dont tire as easily. best option is cardio (any form of exercise/activity that raises your heart rate).\n breathing exercises very important as they help increase your lung-capacity and thus help you sing long notes without getting breathless. they key i PRACTICE. preferably under supervision\n and last but not the least, ALWAYS 20 mins of warm-up b4 you begin serious dancing and 20mins of cool-down after you're done.