Prediction of peak oxygen uptake from differentiated ratings of perceived exertion during wheelchair propulsion in trained wheelchair sportspersons
Date
2014
Authors
Goosey Tolfrey, V.L.
Paulson, T.A.W.
Tolfrey, K.
Eston, R.G.
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European Journal of Applied Physiology, 2014; 114(6):1251-1258
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Purpose: To assess the validity of predicting peak oxygen uptake (V̇O2peak) from differentiated ratings of perceived exertion (RPE) obtained during submaximal wheelchair propulsion. Methods: Three subgroups of elite male wheelchair athletes [nine tetraplegics (TETRA), nine paraplegics (PARA), eight athletes without spinal cord injury (NON-SCI)] performed an incremental speed exercise test followed by graded exercise to exhaustion (V̇O2peak). Oxygen uptake (V̇O2), heart rate (HR) and differentiated RPE (Central RPEC, Peripheral RPEP and Overall RPEO) were obtained for each stage. The regression lines for the perceptual ranges 9-15 on the Borg 6-20 scale ratings were performed to predict (V̇O2peak). Results: There were no significant within-group mean differences between measured V̇O2peak (mean 1.50 ± 0.39, 2.74 ± 0.48, 3.75 ± 0.33 L min-1 for TETRA, PARA and NON-SCI, respectively) and predicted V̇O2peak determined using HR or differentiated RPEs for any group (P > 0.05). However, the coefficients of variation (CV %) between measured and predicted V̇O2peak using HR showed high variability for all groups (14.3, 15.9 and 9.7 %, respectively). The typical error ranged from 0.14 to 0.68 L min-1 and the CV % between measured and predicted V̇O 2peak using differentiated RPE was ≤11.1 % for TETRA, ≤7.5 % for PARA and ≤20.2 % for NON-SCI. Conclusions: Results suggest that differentiated RPE may be used cautiously for TETRA and PARA athletes when predicting V̇O2peak across the perceptual range of 9-15. However, predicting V̇O2peak is not recommended for the NON-SCI athletes due to the large CV %s (16.8, 20.2 and 18.0 %; RPE;b, RPE;b and RPE;b, respectively).
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Copyright 2014 Springer-Verlag