Sökning: id:"swepub:oai:DiVA.org:miun-37600" >
Effects of suppleme...
Effects of supplementing with an 18% carbohydrate-hydrogel drink versus a placebo during whole-body exercise in -5 °C with elite cross-country ski athletes: a crossover study
-
- Pettersson, Stefan, 1972 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kost- och idrottsvetenskap,Centrum för hälsa och prestationsutveckling,Department of Food and Nutrition, and Sport Science,Center for Health and Performance
-
- Edin, Fredrik (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kost- och idrottsvetenskap,Centrum för hälsa och prestationsutveckling,Department of Food and Nutrition, and Sport Science,Center for Health and Performance
-
- Bakkman, Linda (författare)
- Swedish Olympic Committee, Stockholm
-
visa fler...
-
- McGawley, Kerry, 1978- (författare)
- Mittuniversitetet,Institutionen för hälsovetenskap,Swedish Winter Sports Research Centre
-
visa färre...
-
(creator_code:org_t)
- 2022-04-01
- 2019
- Engelska.
-
Ingår i: Journal of the International Society of Sports Nutrition. - : Informa UK Limited. - 1550-2783. ; 16:1
- Relaterad länk:
-
https://doi.org/10.1...
-
visa fler...
-
https://miun.diva-po... (primary) (Raw object)
-
https://jissn.biomed...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://gup.ub.gu.se...
-
visa färre...
Abstract
Ämnesord
Stäng
- BACKGROUND:Whilst the ergogenic effects of carbohydrate intake during prolonged exercise are well-documented, few investigations have studied the effects of carbohydrate ingestion during cross-country skiing, a mode of exercise that presents unique metabolic demands on athletes due to the combined use of large upper- and lower-body muscle masses. Moreover, no previous studies have investigated exogenous carbohydrate oxidation rates during cross-country skiing. The current study investigated the effects of a 13C-enriched 18% multiple-transportable carbohydrate solution (1:0.8 maltodextrin:fructose) with additional gelling polysaccharides (CHO-HG) on substrate utilization and gastrointestinal symptoms during prolonged cross-country skiing exercise in the cold, and subsequent double-poling time-trial performance in ~ 20 °C.METHODS:Twelve elite cross-country ski athletes (6 females, 6 males) performed 120-min of submaximal roller-skiing (69.3 ± 2.9% of [Formula: see text]O2peak) in -5 °C while receiving either 2.2 g CHO-HG·min- 1 or a non-caloric placebo administered in a double-blind, randomized manner. Whole-body substrate utilization and exogenous carbohydrate oxidation was calculated for the last 60 min of the submaximal exercise. The maximal time-trial (2000 m for females, 2400 m for males) immediately followed the 120-min submaximal bout. Repeated-measures ANOVAs with univariate follow-ups were conducted, as well as independent and paired t-tests, and significance was set at P < 0.05. Data are presented as mean ± SD.RESULTS:Exogenous carbohydrate oxidation contributed 27.6 ± 6.6% to the total energy yield with CHO-HG and the peak exogenous carbohydrate oxidation rate reached 1.33 ± 0.27 g·min- 1. Compared to placebo, fat oxidation decreased by 9.5 ± 4.8% with CHO-HG, total carbohydrate oxidation increased by 9.5 ± 4.8% and endogenous carbohydrate utilization decreased by 18.1 ± 6.4% (all P < 0.05). No severe gastrointestinal symptoms were reported in either trial and euhydration was maintained in both trials. Time-trial performance (8.4 ± 0.4 min) was not improved following CHO-HG compared to placebo (- 0.8 ± 3.5 s; 95% confidence interval - 3.0 to 1.5 s; P = 0.46). No sex differences were identified in substrate utilization or relative performance.CONCLUSIONS:Ingestion of an 18% multiple-transportable carbohydrate solution with gelling polysaccharides was found to be well-tolerated during 120 min of submaximal whole-body exercise, but did not improve subsequent maximal double-poling performance.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)
Nyckelord
- Biathlete
- Cold
- Double-poling
- Endurance
- Roller-skiing
- Sex differences
- Stabile isotopes
- Substrate utilization
- World-class
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas