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Journal of Strength & Conditioning Research:
doi: 10.1519/JSC.0000000000000662
Original Investigation: PDF Only

Running performance, pace strategy, and thermoregulation differ between a treadmill and indoor track.

Heesch, Matthew W.S.; Slivka, Dustin R.

Published Ahead-of-Print
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Self-paced time trials have long been used as an indicator of running performance. The purpose of this study was to examine if potential physiological and thermoregulatory differences between treadmill and track running would alter performance in a self-paced 10 km time trial. Ten (n = 10) recreationally-trained male distance runners (32 +/- 6 y, 177 +/- 6 cm, 76 +/- 11 kg, 14.4 +/- 4.5% body fat, 62.2 +/- 9.5 mL [middle dot] kg-1 [middle dot] min-1 VO2 peak) completed two 10 km time trials in a randomized, counter-balanced order on separate days: one on a treadmill at 1% grade (TM), and one on a 200 m indoor track (IT). Core temperature, skin temperature, and heart rate were continuously monitored during the run. 10 km run time was longer during the IT trial (41.66 +/- 5.86 min) than the TM trial (40.10 +/- 6.06 min; p < 0.001), despite a faster first km in IT (p = 0.029). There were no differences between TM and IT trials in HR (174 +/- 13 and 178 +/- 13 bpm, respectively; p = 0.846) or body core temperature (38.6 +/- 0.5 and 38.9 +/- 0.5 [degrees]C, respectively, p = 0.218). Skin temperature was higher in TM (35.1 +/- 2.5 [degrees]C) than IT (32.7 +/- 3.0 [degrees]C; p = 0.002). These data indicate that performance differences exist between a 10 km time trial performed on a treadmill versus an indoor track, potentially due to differences in pacing strategy or metabolic cost between the two conditions.

Copyright (C) 2014 by the National Strength & Conditioning Association.



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