Faculty Publications

Perceived Exertion And Blood Lactate Concentration During Graded Treadmill Running

Document Type

Article

Keywords

Concentric, Eccentric, Heart rate, Muscle fibre type, Ventilation

Journal/Book/Conference Title

European Journal of Applied Physiology and Occupational Physiology

Volume

72

Issue

3

First Page

272

Last Page

277

Abstract

The purpose of this study was to investigate the influences of treadmill gradients on the rating of perceived exertion (RPE) at two fixed blood lactate concentrations( [La-](b)). Ten subjects performed three different incremental treadmill protocols by running either uphill (concentrically-biased), downhill (eccentrically-biased), or on the flat (non-biased). Individual data of each protocol were interpolated to reflect [La-](b) corresponding to 2.0 and 4.0 mmol.l-1. At 2.0 mmol.l-1 [La-](b), RPE and treadmill speed during downhill running were greater than during level running which was greater than during uphill running (p < 0.05). Also, the downhill heart rate (HR) was greater than the uphill HR, and downhill minute ventilation (̇V(E)) was greater than the level ̇V(E). Treadmill speed was the only measure at 4.0 mmol.l-1 [La-](b) to differ between gradients. There was a moderate correlation of RPE with HR at both [La-](b) (r = 0.73 at 2.0 mmol.l-1; r = 0.48 at 4.0 mmol.l-1) while treadmill speed was moderately correlated with RPE only at 2.0 mmol.l-1 [La-](b) (r = 0.70). The results of this study demonstrated that the degree of eccentric-bias during running exercise is an influence of perceived exertion at a moderate but not at a high exercise intensity.

Department

School of Health, Physical Education, and Leisure Services

Original Publication Date

1-30-1996

DOI of published version

10.1007/BF00838651

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