PMID- 35223946 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220502 IS - 2296-861X (Print) IS - 2296-861X (Electronic) IS - 2296-861X (Linking) VI - 9 DP - 2022 TI - Carbohydrate Mouth-Rinsing Improves Overtime Physical Performance in Male Ice Hockey Players During On-Ice Scrimmages. PG - 792708 LID - 10.3389/fnut.2022.792708 [doi] LID - 792708 AB - PURPOSE: This randomized, double-blind, crossover study examined the effects of mouth-rinsing (MR) with a carbohydrate (CHO) vs. a placebo (PLA) solution on external and internal loads in hydrated ice hockey players during regulation and overtime (OT) periods of an on-ice scrimmage. METHODS: Twelve skilled male hockey players (22.6 [3.4] years, 178.9 [4.7] cm, 84.0 [6.5] kg) played three 20-min regulation periods and one 12-min OT period of small-sided 3-on-3 scrimmage. Skaters repeated 2 min shift and rest intervals. Participants mouth rinsed with 25 mL of CHO or PLA solution approximately every 10 min for a total of 7 rinses. A local positioning system (LPS) tracked external load variables including speed, distance, acceleration, and deceleration. Internal load was monitored with heart rate (HR) sensors and a rating of perceived exertion (RPE). RESULTS: During regulation play, both the conditions developed similar fatigue, with significantly decreased high-intensity distance, average speed and decelerations, and increased RPE, from period 1 to 2 and 3. In OT, CHO MR increased the distance skated at high-intensity (224 [77], 185 [66] m, p = 0.042), peak speed (24.6 [1.6], 23.7 [1.3] km.h(-1), p = 0.016), number of sprints (1.9 [1.2], 1.2 [0.9], p = 0.011), and decreased distance skated at slow speed (300 [33], 336 [47], p = 0.034) vs. PLA MR. OT RPE was similar between the two conditions in spite of more work done in CHO MR. CONCLUSIONS: CHO MR may be a valuable practice to protect against decrements in external load with increased playing time in ice hockey, and possibly allows athletes to perform more work relative to perceived levels of exertion. CI - Copyright (c) 2022 Nyman, Gamble, Bigg, Boyd, Vanderheyden and Spriet. FAU - Nyman, Danielle L E AU - Nyman DLE AD - Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada. AD - School of Kinesiology and Health Studies, Queen's University, Kingston, ON, Canada. FAU - Gamble, Alexander S D AU - Gamble ASD AD - Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada. FAU - Bigg, Jessica L AU - Bigg JL AD - Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada. FAU - Boyd, Logan A AU - Boyd LA AD - Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada. FAU - Vanderheyden, Alexander J AU - Vanderheyden AJ AD - Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada. FAU - Spriet, Lawrence L AU - Spriet LL AD - Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada. LA - eng PT - Journal Article DEP - 20220210 PL - Switzerland TA - Front Nutr JT - Frontiers in nutrition JID - 101642264 PMC - PMC8868824 OTO - NOTNLM OT - 3-on-3 scrimmage OT - external load OT - heart rate monitors OT - hydration OT - internal load OT - local positioning system OT - team sport COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2022/03/01 06:00 MHDA- 2022/03/01 06:01 PMCR- 2022/01/01 CRDT- 2022/02/28 05:40 PHST- 2021/10/11 00:00 [received] PHST- 2022/01/10 00:00 [accepted] PHST- 2022/02/28 05:40 [entrez] PHST- 2022/03/01 06:00 [pubmed] PHST- 2022/03/01 06:01 [medline] PHST- 2022/01/01 00:00 [pmc-release] AID - 10.3389/fnut.2022.792708 [doi] PST - epublish SO - Front Nutr. 2022 Feb 10;9:792708. doi: 10.3389/fnut.2022.792708. eCollection 2022.