Exercise physiology reading Flashcards
Heart rates during competitive orienteering, (Bird et al)?
Rationale was to determine how HR, aerobic and anaerobic work changes from Fast run to slow run to highly physical run, indicating the physical demands of the sport and heart capacities of active individuals in different age groups
Scientfically sound as process of evaluation and strong determination between intensities but more factors could have been measured to provide more validity
In depth presentation of data in. multiple graphs and perspectives
Analysation provided logical answers for strange data
Strong conclusion stating its good aerobic exercise, and positive for the cardiovascular system
Negatives:
Common sense its good aerobic exercise and positive for the cardiovascular system
Won’t be applied to developing an athlete
Was overall a very bad study
The maximally attainable V ̇ O2 during exercise in humans: the peak vs. maximum issue
(Day 2003).
interested in whether a VO2 plateau was consistently manifest during maximal incremental ramp cycle ergometry and also in ascertaining the relationship between this peak VO2 (V(O2 peak)) and that determined from one, or several, maximal constant-load tests
Ventilatory and pulmonary gas-exchange variables were measured breath by breath with a turbine and mass spectrometer.
It was found that a plateau in the actual VO2 response is therefore not an obligatory consequence of incremental exercise.
V(O2 peak) attained on a maximum-effort incremental test is likely to be a valid index of V(O2 max),
VO2max is assessed during a graded exercise test. VO2max is the point at which oxygen uptake no longer increases (or increases only marginally) with an increase in workload. In the case that a plateau in oxygen uptake is never reached, this is a submaximal exercise test in which VO2peak is recorded
Intensity domains reading?
The gas exchange and metabolic responses to exercise can be characterised in relation to a number of identifiable exercise intensity domains
Intensity domains were identified, these being moderate, heavy, and severe
Moderate intensity exercise includes all work-rates that are below the gas exchange threshold (GET). Following the onset of moderate intensity exercise there may be an ‘early’ transient increase in blood lactate in some individuals, but during stays bellow baseline
Vo2 will attain a steady state in 2-3 minutes, time will be faster the fitter you are
Heavy intensity exercise comprises work-rates lying between the GET and the asymptote of the hyperbolic relationship between work-rate and time to fatigue, known as the critical power
CP has been demonstrated to be quantitatively similar (though not always identical) to the highest V&o2 at which blood lactate can be stabilised,
hypothesised that the boundary of the heavy and severe exercise domains was not V&o2 peak as originally defined, but instead, CP
The upper boundary of the severe intensity domain was estimated to occur at ~136% of the peak power measured during the ramp test, which in most subjects in this study equated to an exercise duration of ~2 minutes.
