KNES 303 Lecture Notes - Lecture 3: Adenosine Triphosphate, Exercise Prescription, Cardiorespiratory Fitness
30 Jan 2020
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Knes 303 lecture 3 muscle bioenergetics during exercise. Summary from last class: pa/et - > cardio-respiratory fitness (crf, vo2max, poor validity of self-reported measures of pa/et. Inter-individual variability in training responsiveness amongst individuals: minimum dose required, e. g. , responders vs non-responders, exercise prescription guidelines, a framework upon which to base prescription of exercise, limitations: Intensity develops as a linear function of maximal responses (e. g. , vo2max, hrmax) What is exercise intensity: rpe/effort can be used to represent exercise intensity highlight the role of psychology too (perceptions) Why is atp utilized: to sustain muscle contraction, excitation-contraction coupling, action potential (which propagates over the muscle membrane, opening of sarcoplasmic reticulum, calcium release, change of configuration of the myosin head, power stroke, atp hydrolysis (adp formation) As duration increases, oxidative phosphorylation contribution increases while pcr contribution decreases: mitochondrial respiration = oxidative phosphorylation, power output decreases with time as exercise continues and after a certain period of time, the person will be exercising at their.
