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Module 1: Chronic training responses

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XSIQ
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Physical Education - Submaximal

Submaximal changes

Anaerobic threshold [1]:

* this is a result of a more efficient aerobic system and therefore a
decrease in the amount of lactic acid [2] needed to be produced

* this increase occurs as a result of increases in ventricular size as
well as greater contractibility

* the blood flow to working muscles actually decreases as the working
muscles become more efficient and therefore don't require the same oxygen

* due to an increase in stroke volume (SV), heart rate (HR) actually
decreases at sub-maximal activity. Make sure you understand this concept,
as it is commonly asked on exams. You need to understand the equation CO =
SV x HR. If CO (cardiac output) requirements are the same and SV has
increased, then HR will decrease.

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[1] http://alison.com/#
[2] http://alison.com/#