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Can ten days of heat acclimation training improve temperate-condition rowing performance in national-level rowers?
Journal article   Open access   Peer reviewed

Can ten days of heat acclimation training improve temperate-condition rowing performance in national-level rowers?

Calvin P Philp, Nathan W Pitchford, Denis C Visentin, Cecilia M. Kitic, James W. Fell, Martin Buchheit, Christopher T Minson, John R. Gregory and Greig Watson
PloS one, Vol.17(9), e0273909
2022
DOI: https://doi.org/10.1371/journal.pone.0273909
PMID: 36048867
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Published1.31 MBDownloadView
CC BY V4.0,  Open Access

Abstract

thermoregulation environmental physiology exercise performance
This study investigated whether heat acclimation (HA) could improve rowing performance in temperate conditions in national-level rowers. Using a parallel-group design, eleven rowers (3 female, 8 male, age: 21 +/- 3 years, height: 182.3 +/- 6.8cm, mass: 79.2 +/- 9.0kg, (V) over dotO(2peak): 61.4 +/- 5.1ml.kg.min(-1)) completed either a HA intervention (HEAT, n = 5) or acted as controls (CON, n = 6). The intervention replaced usual cross-training sessions and consisted of an hour of submaximal cycling or rowing ergometry in either 34 +/- 0 degrees C for HEAT or 14 +/- 1 degrees C for CON daily over two five-day blocks (10 sessions total), separated by 72h. Participants performed the '10+4' test that consists of 10-min submaximal rowing and a 4-min time-trial (TT) in temperate conditions (20 +/- 0 degrees C) before and after the intervention. Heat acclimation following the 10-session intervention was evidenced by large significant (p<0.05) decreases in maximum tympanic temperature (d = -1.68) and rate of perceived exertion (RPE) (d = -2.26), and a large significant increase in sweat loss (d = 0.91). Large non-significant (p>0.05) decreases were seen in average tympanic temperature (d = - 3.08) and average heart rate (d = -1.53) in HEAT from session 2 to session 10 of the intervention. Furthermore, a large significant increase was seen in plasma volume (d = 3.74), with large significant decreases in haemoglobin concentration (d = -1.78) and hematocrit (d = -12.9). Following the intervention, large non-significant increases in respiratory exchange ratio (d = 0.87) and blood lactate (d = 1.40) as well as a large non-significant decrease in RPE (d = -1.23) were seen in HEAT during the 10-min submaximal rowing. A large significant decrease in peak heart rate (d = -2.27), as well as a large non-significant decrease in relative (V) over dotO(2peak) (d = -0.90) and large non-significant increases in respiratory exchange ratio (d = 1.18), blood lactate concentration (d = 1.25) and power output (d = 0.96) were seen in HEAT during the 4-min TT. This study suggests that a 10-session HA intervention may elicit HA in national-level rowers, with potential to improve 4-min TT performance in temperate conditions.

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Citation topics
1 Clinical & Life Sciences
1.172 Sports Science
1.172.823 Thermoregulation
Web Of Science research areas
Sport Sciences
ESI research areas
Clinical Medicine
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