Depends: Depending on your level of fitness and the sport/activity you are doing. Work to increase your cardiovascular fitness, assuming you don't have any health problems that prevent you from safely exercising or could be contributing to your fatigue (ex: hypothyroidism, poorly controlled diabetes, anemia)
Answered 8/20/2014
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May be Endurance : Very commonly this is an overall conditioning or endurance issue. It's important to gradually work into an exercise program or conditioning schedule. You may feel tired simply because your body isn't used to it. Also can be a hydration or energy issue - want to make sure to stay well hydrated, eat well before exercise.
Answered 3/31/2015
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