What make me sleepy immediately after exercise. I thought exercise should rev you up and wake you up?
350293
Are you in the beginning of a workout cycle? If so, your body is adjusting to the new cycle of activity. Don't worry, as you progress, you will feel more energy.\n\nAlso, your blood sugar may be low, which is causing the body to want to sleep to conserve energy. This is probably the case if you work out first thing in the morning before eating.\n\nFor weight training, eat immediately after your workout. For cardio, wait one hour (for fat burning), then eat.\n\nStick with it! You'll get more energy, soon.
368413
There could be any number of reasons contributing to fatigue.  I suggest you explore your day to day life before rushing off to the doctor or self diagnosing depression.  How active are you?  You may think that excercise will wear you out, but infact it does just the opposite.  Excercise realease endorphins which are the bodies very own, NATURAL, happy chemicals.  You will feel much more enegetic if you get 20-30 minutes of physical activity daily. [it doesn't have to be strenuous either... go for a walk, do some yoga, take the stairs, park further away from the buildings in which you are visiting, ride a bicycle, jump rope! Anything!]  Secondly, what kinds of food are you taking into your body on a daily basis?  Are you eating healthy food... or junk?  Sugar (sucrose) makes you tired for sure!  So if you have a sweet tooth and you nurture it generously, you will cause highs and lows in your blood sugar levels, which could lead to diabetis.  Any food that is natural to mother Earth will provide you with oodles of energy... but you can't just look at it, you have to eat it!  And as always, drink lots of water.  Start with your diet and excercise first and foremost. Lastly, make sure you are getting enough sleep.  You said you get 8 hours of sleep, but did you know that the body operates optimally if you are in bed for sleep  by (the latest) 10pm!  Your body should be in a state of deep sleep by the time midnight rolls around as the hours between 12am-3am are when your bidy undergoes repair.  It is very crucial that your body is given full range of hours to repair itself so it releases toxins and battles physical stress.  Also remember, too much sleep will make you tired just as too little sleep will make you tried.  Take the middle path and keep a positive attitude and most likely you won't need to waste your money on a doctor who will give you similar advise!
1179621
1.  Frequent headaches - see your doctor, there could be an underlying problem you can't see.\n\n2.  When do you work out?  Day time - excellent, but not after your last meal of the day.  When you exercise, you are working up your metabolism - and yes, exercise and a full day of activities can wear you out - this is why we sleep.\n\nIf you work out after your last meal of the day, you are over working your metabolism and it takes time for the body to wind down properly.\n\nBeing tired, drowsy, fatigued does not make you "weak" just means you have worn yourself out.  This is good if you wish to live a normal life of excercise, activity, and eating a sensible diet.\n\nIf you are over drowsy, tired, fatigued, then you should seek advice from your doctor.  Taking vitamins and suppliments do not replace a proper sensible diet.\n\nDon't try to over do the excercise - this could lead to serious health issues that you will do more harm to your body too early - thus wearing out your interest in remaining in a healthy state of being.\n\nTry Yoga and meditating for calming yourself down, stretching your body's muscles properly and thus after your last meal of the day, you can relax as you should.  The human body can only do so much, and not more than it should/could.  Try getting to know your body, learn to like yourself and excercise appropriately at the right times of the day.  Rest when you should.
783158
cardio and workouts help, but at the end of the day, lactic acid builds up fast during high intensity exertion, and that causes the burn that wears on your will power, and your ATP is depleted beyond the muscles ability to replace it. then you run out of energy.\n\nlong  and paced exercise does different things to you physically than   fast and erratic.
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.
309496
I saw a story on Sumo Wrestlers and how they immediately nap after eating so they can pack on the pounds. Any kind of moving around after eating even if it is just minor walking starts to burn the calories, sleeping burns the fewest calories.
906880
Something small prior to exercising will help to get your metabolism pumping.  If you eat nothing and then have a hard workout, you will probably be starving not long after you are done exercising.  If that happens, when you do eat, your body will not want to burn the calories because you have forced your body into a mini-starvation mode.  Therofore, your body won't burn the calories because it doesnt know when it will get more fuel.
326211
When you exercise, sugar is broken down into different chemicals, to produce energy for muscles. As long as you get all the oxygen you need, the final products are carbon dioxide and water, but if you exercise so vigorously that you can't get the oxygen that you need, the reactions stop, causing a chemical called lactic acid to accumulate in your muscles and spill into you bloodstream. \n\nLactic acid causes muscles to hurt and makes you feel tired. You breathe hard and fast and slow down to catch up with your oxygen debt, which converts lactic acid into carbon dioxide and water that are blown off as you breathe. Blood levels of lactic acid lower and your muscles stop hurting. A pace that you can hold breathing deeper and faster, but not gasping for breath is called the lactic acid threshhold and is the training level for most competitive athletes.\n\nDuring intense exercise, such as sprinting type activities, when the rate of demand for energy is high, lactate is produced faster than the ability of the tissues to remove it and lactate concentration begins to rise. This is a beneficial process since the regeneration of NAD+ ensures that energy production is maintained and exercise can continue. Contrary to popular belief, this increased concentration of lactate does not directly cause acidosis, nor is it responsible for muscle pain or "burning". This is because lactate itself is not capable of releasing a proton, and secondly, the acidic form of lactate (lactic acid) cannot be formed under normal circumstances in human tissues. Analysis of the glycolytic pathway in humans indicates that there are not enough hydrogen ions present in the glycolytic intermediates to produce lactic or any other acid.\n\nThe acidosis that is associated with increases in lactate concentration during heavy exercise arises from a completely separate reaction. When ATP is hydrolysed (split) for energy, a hydrogen ion is released. It is these hydrogen ions that are primarily responsible for the decrease in pH. During intense exercise, oxidative metabolism (aerobic) cannot produce ATP quick enough to supply the demands of the muscle. As a result, glycolysis (i.e. anaerobic metabolism) becomes the dominant energy producing pathway as it can form ATP at high rates. Due to the large amounts of ATP being produced and hydrolysed in a short period of time, the buffering systems of the tissues are overcome, causing pH to fall and creating a state of acidosis. This may be one factor, among many, that contributes to the acute muscular discomfort experienced shortly after intense exercise.\n\nAlthough it is not firmly established, it is possible that lactate may contribute to an acidotic effect via the strong ion difference, however this has not been well investigated in exercise physiology research and so its contribution is still uncertain.
963243
That's the time to load up on carbs-After Exercise\n\nA sweaty workout depletes the stores of fuel (called glyeogen) in your muscles.  So replenish them by chugging some OJ or eating half a bagel.  And do it quickly: studies show your body makes new glyeogen most readily in the 15 minutes after exercising.  if you miss that window, you might not be as strong for your next workout.  To get an extra glycogen boost, throw in some protein, too-like peanut butter on crackers, or a few slices of turkey on wheat bread.  protein also helps repair and build your muscles after strength training.  No snacks available ?  At least drink plenty of water or a sports drink to replace what you sweat out : from "Health September 2006"
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!
330842
that is your body's reminder to you that you need to move!\n\nusually when that happens, there is a loss of blood circulation from that area, and it "falls asleep." it's a painful reminder sent to us by our muscle tissue that it needs oxygen!
73862
I am having some success with exercising in the morning AND eating breakfast.  I exercise first and then follow up with a light breakfast which includes most of the carbs I will eat for the day (I try to eat fewer carbs for lunch and even fewer or none at all for dinner).  I seem to have a lot more energy in the morning, and consequently throughout the day, since I started exercising in the morning.
977883
Because exercise IS good for your metabolic rate and your digestion. Its a good thing you have to go to the loo right after eating, it means all the blood is flowing around your system and this has been stimulated from the exercise. You have nothing to worry about - you are right on track!
549289
I am a workout junkie, and the same thing happens to me.  Basically, your body has lost potassium, along with other minerals, and you have also worked muscles that now need to rest.  As they start contracting, your body starts to feel the effects of it.  \n\nMight I suggest eating more bananas and other foods with potassium, along with drinking Gatorade Fitness water.  But, also realize, your body does need to rest from a hard workout, and as your metabolism has been increased, it is burning more energy faster, which can cause the body to feel fatigued.
1025675
When you stop suddenly after exercising vigorously, your leg muscles stop pumping and your heart has to pick up the extra work.\n\nTo make your heart beat faster and stronger, your body increases production of its own natural stimulants called adrenalin and noradrenaline. This can cause the heart to beat irregularly, depriving your brain of adequate oxygen, so you feel dizzy and can even pass out.
410739
Exercise speeds up the heart rate and triggers endorphins in your brain, as well as adrenaline. Exercise before bed can result in insomnia. It may not be medically unhealthy to exercise before bed, but it would be much wiser to exercise in the morning so that your body is prepared for the day.
807491
Do not engage in any type of exercise 2 hrs prior to going to bed.  Try a glass of milk- it contains a protein that helps you sleep. Avoid caffeine:teas,coffee,sodas etc.. Comfortable pijamas,idealroom temp,reading a book,aviod a great movie or show it will keep u stimulated.  Good luck!