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What HIIt are you doing? Some HIIT such as jump roping 20 seconds on 10 seconds off is easier than say, sprinting for 20 seconds jogging for 10? You can start with easier HIIT if you'd like but to improve whatever you're doing... Stamina comes in the form of aerobic capacity, lactic capacity, alactic capacity, and muscular endurance. They all play a part in ...


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Try not to do anything like HIIT in the evening, as it can interrupt sleep patterns Also don't do just the HIIT but combine it will other exercise. Consider more complete and lest taxing practices , that don't interfere with sleep such as tai chi and yoga


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As others have mostly mentioned: - try to workout earlier, in the morning - stretch before bed to relax your muscles and reduce stress - switch to a different exercise routine: cardio (LISS), weightlifting, sports - have sex at night - consider other factors that could lead to insomnia/sleep loss, ie: caffeine, diet, stress. Know that this may be natural ...


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Strenuous workouts can deplete the glycogen stores in the muscles. Since the muscles need glycogen as energy, cortisol is produced. The cortisol speeds up the process of refueling the muscles with glycogen (by increasing the blood sugar). As Ace Cabbie mentions it can take many hours for the cortisol levels to come down. In a study of 20 young men running a ...


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Your cortisol levels only raise temporarily, so if you workout before 3pm-ish, your cortisol levels should lower by the time you go to bed. Cortisol keeps you awake, and stress causes cortisol increases. Cortisol can also spike with an intense workout. So if working out before 3pm doesn't solve your issue, you can also look at ways to reduce your stress or ...


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