Affiliation:
1. Department of Physiatry and Nursery, University of Zaragoza, Zaragoza,
Spain
2. Institut Nacional d'Educació Física de
Catalunya (INEFC), Universitat de Lleida (UdL), Lleida, Spain
Abstract
AbstractThe Allen & Coggan protocol suggests that 95% of the power output
during a 20-min time trial is a valid surrogate for 60-min maximal power. The
validity of this concept has not been studied previously in cyclists with
different performance levels. As a result, we classified 120 cyclists in our
study as recreationally trained, trained, well trained or professional, based on
their maximal oxygen consumption. Participants performed a functional threshold
power testing protocol based on a 20-min time trial and a 60-min time trial,
separated by a 72-hour rest. Sixty-minute maximal power was successfully modeled
with 20-min maximal power and performance group using 2/3 of the dataset
(R2=0.77, 95% CrI [0.74, 0.79]) with different
coefficients for each group: Professional:
PO60min=PO20min × 0.96; well trained:
PO60min=PO20min × 0.95; trained:
PO60min=PO20min × 0.92 and
recreationally trained: PO60min=PO20min ×
0.88. The predictions of the original equation and our model were assessed using
the remaining third of the data. The predictive performance of the updated
equation was better (original: R2=0.51, mean absolute
error=27 W, mean bias=–12 W; updated:
R2=0.54, mean absolute error=25 W, mean
bias=–7 W).
Subject
Orthopedics and Sports Medicine,Physical Therapy, Sports Therapy and Rehabilitation