1563: Why You're Wasting Your Time Doing Only Long, Slow Aerobic Workouts by Ben Greenfield on Exercising Smart
Optimal Health Daily - Fitness and Nutrition
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High Intensity Interval Training Increases Capillary Density
Some people will argue that hard exercise doesn't increase capillary density in the same way as long, slow distance workouts. But data suggests that this isn't true either. A study in the journal of physiology back in 19 77 showes that high intensity training increases capillary density to a greater extent than low intensity training. Both studies suggest that high intensity exercise is significantly effective at increasing both capillary density and capillary growth factor,. release, growth factor being another highly important fitness training response.
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