When we do low intensity and primarily aerobic efforts, we use Type 1 muscle fibres (Slow Oxidative), whereas glycolytic efforts use Type 2A and 2B fibres (Fast Oxidative and Fast Glycolytic). The type of muscle that produces power this way is also different. This happens when we break down glucose into lactate without using oxygen (anaerobically) and, although it doesn’t produce as much ATP (Adenosine Triphosphate, which our body uses as energy for every action), it produces it far more quickly than breaking down fats or carbohydrates aerobically. Let's geek out.Įfforts such as those in this cycling workout are referred to as glycolytic efforts because of the way in which we produce power at these intensities. Great for catching people off-guard in a road race or blasting your way up the pack in a Zwift race at 500m to go. It’ll also boost the amount of power – and duration – you can sustain for a long, drawn-out sprint. These one minute efforts will activate that energy system, helping to improve your climbing, more specifically your ability to blast up short, sharp and steep hills. The muscle fibres you use in high intensity efforts are actually distinct to the ones used in endurance efforts - so you could potentially be doing hours of training but leaving this whole area completely neglected.
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