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Adaptations of the Respiratory System

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Dan Wilson

on 21 November 2012

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Transcript of Adaptations of the Respiratory System

Increased elasticity of respiratory
structures (e.g. lungs, aveoli and pleaura.) Increased alveoli meaning greater
surface area for diffusion Respiratory Structures Breathing Mechanics Dan Wilson, Louis Peek, Luke Banton and Harry Mabbit Adaptations of the Respiratory System Increased longevity of
respiratory structure efficiency Increased efficiency and economy of respiratory muscles reduces the oxygen costs of the respiratory muscles, reducing respiratory fatigue Increased strength, power and endurance of respiratory muscle Respiratory Volumes in general lung volumes and capacity change little with training, at rest and during sub-maximal activity. However, TV (tidal volume)can increase during maximal exercise Respiratory frequency decreases at rest/sub-maximal activity Maximal VE can significantly increase from arounf 120Lmin in an intrained athlete to 150Lmin following training 180-200+ in elite athletes , due to increase in TV at maximal exercise Diffusion Diffusion unchanged at rest/sub-maximal exercise Increase in pulmonary diffusion during maximal activity Increased VO2 difference (arterial-venous oxygen difference) at maximal activity (less oxygen in venous blood representing increased delivery and extraction of oxygen to active muscles) Outcomes the net effect of all the above efficiency improvements is that we have maximal oxygen consumption (VO2) and the lactate threshold increases, both of which improve performance Main Performance benefits are... aerobic performance during higher/maximal work rates is both increased and prolonged more effect with aerobic endurance activity that is dependent more upon oxygen, although it will delay the anaerobic threshold and therefore delay fatigue during anaerobic activity reduced the effort of sub-maximal work therefore increasing duration of performance a more efficient and healthy respiratory system encourages and promotes a lifelong involvement in an active/ healthy lifestyle
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