|Title: ||Determinants of 800-m and 1500-m Running Performance Using Allometric Models|
|Citation: ||Medicine & Science in Sports & Exercise, 40(2): 345-350|
|Publisher: ||American College of Sports Medicine|
|Issue Date: ||2008 |
|Additional Links: ||http://www.acsm-msse.org/pt/re/msse/abstract.00005768-200802000-00021.htm|
|Abstract: ||Purpose: To identify
the optimal aerobic determinants of elite, middle-distance running (MDR) performance, using proportional allometric models.
Methods: Sixty-two national and international male and female 800-m and 1500-m runners undertook an incremental exercise test to
volitional exhaustion. Mean submaximal running economy (ECON), speed at lactate threshold (speedLT), maximum oxygen uptake
(V˙ O2max), and speed associated with V˙ O2max (speedV˙ O2max) were paired with best performance times recorded within 30 d. The data
were analyzed using a proportional power-function ANCOVA model. Results: The analysis identified significant differences in running
speeds with main effects for sex and distance, with V˙ O2max and ECON as the covariate predictors (P G 0.0001). The results suggest a
proportional curvilinear association between running speed and the ratio (V˙ O2maxIECONj0.71)0.35 explaining 95.9% of the variance in
performance. The model was cross-validated with a further group of highly trained MDR, demonstrating strong agreement (95% limits,
0.05 T 0.29 mIsj1) between predicted and actual performance speeds (R 2 = 93.6%). The model indicates that for a male 1500-m runner
with a V˙ O2max of 3.81 LIminj1 and ECON of 15 LIkmj1 to improve from 250 to 240 s, it would require a change in V˙ O2max from 3.81
to 4.28 LIminj1, an increase of $0.47 LIminj1. However, improving by the same margin of 10 s from 225 to 215 s would require a
much greater increase in V˙ O2max, from 5.14 to 5.85 LIminj1 an increase of $0.71 LIminj1 (where ECON remains constant).
Conclusion: A proportional curvilinear ratio of V˙ O2max divided by ECON explains 95.9% of the variance in MDR performance.|
|Description: ||Metadata only|
|Keywords: ||Middle-distance running|
|Appears in Collections: ||Sport, Exercise and Health Research Group|
Learning and Teaching in Sport, Exercise and Performance
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