![]() However, as exercise intensity rises (such as during high-intensity interval training) anaerobic metabolism becomes proportionally more important.Ī major factor here is the increased recruitment of type II (fast twitch) muscle fibres. During endurance sports, we meet most of our energy needs through aerobic metabolism. Muscles produce energy through aerobic (requiring oxygen) and anaerobic (not requiring oxygen) metabolism. Increased muscle fibre recruitment – reduces the workload placed on individual muscle fibres which improves fatigue resistance.īoth cardiovascular endurance and muscular endurance are key components of fitness.improved delivery of oxygen to the working muscles (greater cardiovascular fitness). ![]() Adaptations to the aerobic and anaerobic energy systems.We can improve this through specific training that improves the fatigue resistance of slow and fast twitch muscle fibres. One factor here is the ratio of different muscle fibre types (fast and slow twitch). The greater the level of muscular endurance, the more force the muscle can exert over time. ![]() An athlete with good muscular endurance can repeat a series of muscular contractions without fatiguing. Muscular endurance is the ability of a muscle, or a group of muscles, to exert a force for a prolonged period. Through training, we improve the efficiency of all parts of the cardiovascular system.
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