Trapped sweat in basketball uniforms and the effect on sweat loss estimates. Issue 18 (28th September 2017)

• Record Type: Journal Article
• Authors: Baker, Lindsay B.; Reimel, Adam J.; Sopeña, Bridget C.; Barnes, Kelly A.; Nuccio, Ryan P.; De Chavez, Peter John D.; Stofan, John R.; Carter, James M.
• Is Part Of: Physiological reports. Volume 5:Issue 18(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-09-28
• Subjects: Basketball protocol -- intermittent exercise -- team sports; Physiology -- Periodicals; 571
• DOI: 10.14814/phy2.13463
• Languages: English
• ISSNs: 2051-817X

Abstract

Abstract: The aims of this study were to determine: (1) trapped sweat (TS) in basketball uniforms and the effect on sweat loss (SL) estimates during a laboratory‐based basketball simulation protocol; (2) the impact of exercise intensity, body mass, age, and SL on TS; and (3) TS during on‐court training to assess the ecological validity of the laboratory‐based results. Twenty‐four recreational/competitive male basketball players (23 ± 10 years, 77.0 ± 16.7 kg) completed three randomized laboratory‐based trials (Low, Moderate, and High intensity) consisting of 150‐min intermittent exercise. Eighteen elite male players (23 ± 4 years, 92.0 ± 20.6 kg) were observed during coach‐led, on‐court training. Nude and clothed body mass were measured pre and postexercise to determine TS. Data are mean ± SD. There was a significant effect of intensity on SL and TS ( P < 0.001, Low<Moderate<High, ANOVA). During Low, subjects lost 1.10 ± 0.59 kg sweat and TS was 0.11 ± 0.15 kg (8.0 ± 5.1% SL). During Moderate, subjects lost 1.60 ± 0.56 kg sweat and TS was 0.21 ± 0.21 kg (11.6 ± 6.3% SL). During High, subjects lost 2.12 ± 0.66 kg sweat and TS was 0.38 ± 0.28 kg (16.0 ± 7.4% SL). Multiple regression and partial correlation analysis suggested TS was significantly related to SL ( P < 0.0001; partial r = 0.81–0.89), whereas the contributions of body mass ( P = 0.22–0.92) and age ( P = 0.29–0.44) were not significant. TS during on‐court training was 0.35 ± 0.36 kg, which was associated with a 14.1 ± 11.5% underestimation in SL, and was not statistically different than laboratory‐based results ( P = 0.59). Clothed body mass measurements should be used with caution, as TS is highly variable and can cause a significant underestimation in SL in athletes with high sweating rates. Abstract : The aims of this study were to determine: (1) trapped sweat (TS) in basketball uniforms and the effect on sweat loss (SL) estimates during a laboratory‐based basketball simulation protocol; (2) the impact of exercise intensity, body mass, age, and SL on TS; and (3) TS during on‐court training to assess the ecological validity of the laboratory‐based results. Clothed body mass measurements should be used with caution, as TS is highly variable and can cause a significant underestimation in SL in athletes with high sweating rates.