Lab 2 - Ergometry Flashcards
Ergometers allow us to ………. the amount of ………. done by the subject or athlete.
control, work
Ergometer:
ergo =
meter =
work, measure
Ergometer help sports scientists to create …….. and ……… testing sessions
valid, reliable
Critical that workloads are ………. and ergometers have frequent ……….
controlled, calibration
Mechanically braked ergometer
What is it, example
resistance can be applied or reduced by means of a belt that surrounds a flywheel.
e.g. the Monark cycle ergometer
Air-braked
What is it, example
work output is proportional to pedal cadence and the surface area of blades on the flywheel
e.g. wind-braked ergometers like the Repco cycle ergometer and the Concept II
Electronically-braked
What is it, example
work rate is controlled electronically
e.g. treadmills, cycle ergometers
Ergometers are usually combined with instruments to evaluate physiological responses to continuous effort and aerobic endurance.
Cardiographic: (3)
- heart rate monitors
- electrocardiograms
- blood pressure sphygmomanometers
Ergometers are usually combined with instruments to evaluate physiological responses to continuous effort and aerobic endurance.
Metabolic: (1)
- gas analysis
Ergometers are usually combined with instruments to evaluate physiological responses to continuous effort and aerobic endurance.
Blood chemistry: (2)
- lactate
- pH
Base formula for Work:
Work = F x d
Work measured in:
Joules (J)
Force is produced when a ……. is acted upon by …….. .
mass, acceleration
Power can be expressed both as ………. or most commonly as watts (W).
kilopond-metres per minute
Loads can be classed as fixed:
workload remains the same
Loads can be classed as incremental:
workload gradually increases
Incremental tests can be two things:
- continuous (workload increased at a preset rate)
- intermittent (tests contain specific work:rest ratio).
The increases in load can be used to achieve two things:
- steady-state (load increases are long enough to allow a degree of plateau in physiological responses)
- non-steady state (where the load increases are too high or too short in duration to achieve a plateau in physiological responses).
Inaccuracies/Errors in calculation of work and power can result from: (3)
- Inherent errors in the ergometer
- Faulty calibration or adjustment of the ergometer
- Human error and / or variability of the subjects
