- valuable in assessing overall health of individual
- helps determine...
- functional capacity
- level of cardiorespiratory function
- underlying abnormalities that signify stages of cardiovascular disease
- helps PT reassess client's progress
- estimates body's ability to use O2 for energy.
-Measuring VO2 max. in lab analyzes exhaled air during max. exercise.
- cardioresp. assess. at max. effort dangerous
220 - age: one-size-fits-all approach. Can underestimate true max. for the very deconditioned and overestimate VO2 max for the very fit
- true value of submax. cardioresp. testing is when client repeats same test months later and compare results
220-age (44) = 176
GXTs- use treadmill, cycle ergometer or arm ergo. to meas. cardioresp. fitness.
- some test administered in states w/ gradual intensity increase.
- others meas. HR response to single-stage bout of exercise.
- in lag GXTs done to max. exertion
linear relationship between increases in workload and increased HR and O2 uptake. By measuring HR response to submaximal exercise, the relationship between workload, HR and O2 uptake let PT estimate VO2 max.
- VO2 max. determined by estimating MHR at sub. max workloads
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