In terms of human calorie consumption and fat loss, how is cycling for 3 hours at a steady pace 2 days a week different from cycling 1 hour at the same pace 6 days a week.
After a little while any exercise becomes more tiring and uses up more energy to maintain, one of the reasons why running a marathon is relatively difficult. Sugars and oxygen stored in the muscles is used up and needs to be replaced which uses up energy reserves and calories.
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