Wexp {trackeR} | R Documentation |
W' expended.
Description
Calculate W' expended, i.e., the work capacity above critical power/speed which has been depleted and not yet been replenished.
Usage
Wexp(object, w0, cp, version = c("2015", "2012"), meanRecoveryPower = FALSE)
Arguments
object |
Univariate |
w0 |
Initial capacity of W', as calculated based on the critical power model by Monod and Scherrer (1965). |
cp |
Critical power/speed, i.e., the power/speed which can be maintained for longer period of time. |
version |
How should W' be replenished? Options include
|
meanRecoveryPower |
Should the mean of all power outputs below critical power be used as recovery power? See Details. |
Details
Skiba et al. (2015) and Skiba et al. (2012) both describe an
exponential decay of expended over an interval
if the power output during this interval is
below critical power:
However, the factor nu differs: Skiba et al. (2012) describe it as
with
estimated as
Skiba et al. (2015) use . Skiba et
al. (2012) and Skiba et al. (2015) employ a constant recovery power
(calculated as the mean over all power outputs below critical
power). This rationale can be applied by setting the argument
meanRecoveryPower
to TRUE
. Note that this uses
information from all observations with a power output below
critical power, not just those prior to the current time point.
References
Monod H, Scherrer J (1965). 'The Work Capacity of a Synergic Muscular Group.' Ergonomics, 8(3), 329–338.
Skiba PF, Chidnok W, Vanhatalo A, Jones AM (2012). 'Modeling the Expenditure and Reconstitution of Work Capacity above Critical Power.' Medicine & Science in Sports & Exercise, 44(8), 1526–1532.
Skiba PF, Fulford J, Clarke DC, Vanhatalo A, Jones AM (2015). 'Intramuscular Determinants of the Ability to Recover Work Capacity above Critical Power.' European Journal of Applied Physiology, 115(4), 703–713.