HKR 2300 Chapter 8: HKR2300 - Chapter 8
16 Feb 2017
School
Department
Course
Professor
Document Summary
Cardiovascular fitness: a form of muscular endurance, efficiency of the heart, lungs, and vascular system in delivering oxygen to working tissue, your ability to deliver oxygen to the muscle is affected by: Cardiovascular fitness: heart rate: the number of times the heart beats each minute (hr, changes over the lifespan. Probably due to lower stroke volume so the heart has to beat more often to get enough blood out: children"s hr. 1 year ~ 80 100 bpm. Hr will continue to decline at rest until adolescence: adolescence. Female ~ 62 63 bpm: overall, resting hr declines by 50% from birth to maturity, adulthood. Average ~ 75 79 bpm: there is a decline in hr with age. Researchers believe the decline in hr with age is due to a decrease in sympathetic outflow and changes in the contractile properties of cardiac muscle: to predict maximal hr. Hr max = 195 220 bpm.
