EXSC300 Training adaptations Spring2009 for lecture

EXSC300 Training adaptations Spring2009 for lecture -...

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Physiological Responses and Adaptations to Acute Exercise Exercise Definitions • Physical Activity – displacement of the homeostasis of rest elicited by muscle contractions resulting in movement and increased energy expenditure •Exe rc ise – planned, structured, and repetitive bodily movement done to maintain or improve one
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Exercise Definitions • Acute Exercise –physiological responses associated with the immediate effects of a single bout of physical activity regardless of modality used or the exercise history or characteristics of the subject Exercise Intensity 2 primary methods –% MVC – % VO2max
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Motor unit recruitment • The progressive activation of a muscle by successive recruitment of contractile units (motor units) to accomplish increasing gradations of contractile strength. Motor Unit Recruitment • methods: – cycle ergometer – 31 – 85% VO2max – 12 – 180 min – stain biopsy for [glycogen]
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• Very dependent on FORCE production needs of the muscle and proceeds from the ‘smallest‘ motor units (Type I) to ‘largest’ motor units (Type IIa and then to Type IIb/x). Size Principle
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EXSC300 Training adaptations Spring2009 for lecture -...

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