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Anaerobic work capacity in cycling: the effect of computational method
Ist Teil von
European journal of applied physiology, 2022-12, Vol.122 (12), p.2637-2650
Ort / Verlag
Berlin/Heidelberg: Springer Berlin Heidelberg
Erscheinungsjahr
2022
Quelle
SpringerLink_现刊
Beschreibungen/Notizen
Purpose
To compare the anaerobic work capacity (AnWC, i.e., attributable anaerobic mechanical work) assessed using four different approaches/models applied to time-trial (TT) cycle-ergometry exercise.
Methods
Fifteen male cyclists completed a 7 × 4-min submaximal protocol and a 3-min all-out TT (TT
AO
). Linear relationships between power output (PO) and submaximal metabolic rate were constructed to estimate TT-specific gross efficiency (GE) and AnWC, using either a measured resting metabolic rate as a Y-intercept (7 + Y
LIN
) or no measured Y-intercept (7-Y
LIN
). In addition, GE of the last submaximal bout (GE
LAST
) was used to estimate AnWC, and critical power (CP) from TT
AO
(CP
3´AO
) was used to estimate mechanical work above CP (
W’
, i.e., “AnWC”).
Results
Average PO during TT
AO
was 5.43 ± 0.30 and CP was 4.48 ± 0.23 W∙kg
−1
. The TT-associated GE values were ~ 22.0% for both 7 + Y
LIN
and 7-Y
LIN
and ~ 21.1% for GE
LAST
(both
P
< 0.001). The AnWC were 269 ± 60, 272 ± 55, 299 ± 61, and 196 ± 52 J∙kg
−1
for the 7 + Y
LIN
, 7-Y
LIN
, GE
LAST
, and CP
3´AO
models, respectively (7 + Y
LIN
and 7-Y
LIN
versus GE
LAST
, both
P
< 0.001; 7 + Y
LIN
, 7-Y
LIN
, and GE
LAST
versus CP
3´AO
, all
P
< 0.01). For the three pair-wise comparisons between 7 + Y
LIN
, 7-Y
LIN
, and GE
LAST
, typical errors in AnWC values ranged from 7 to 11 J∙kg
−1
, whereas 7 + Y
LIN
, 7-Y
LIN
, and GE
LAST
versus CP
3´AO
revealed typical errors of 55–59 J∙kg
−1
.
Conclusion
These findings demonstrate a substantial disagreement in AnWC between CP
3´AO
and the other models. The 7 + Y
LIN
and 7-Y
LIN
generated 10% lower AnWC values than the GE
LAST
model, whereas 7 + Y
LIN
and 7-Y
LIN
generated similar values of AnWC.