Abstract
| Language | English |
|---|---|
| Pages | 1123-1129 |
| Number of pages | 7 |
| Journal | Journal of Science and Medicine in Sport |
| Volume | 20 |
| Issue number | 12 |
| Early online date | 21 Apr 2017 |
| DOIs | |
| Publication status | Published - 1 Dec 2017 |
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The influence of a 12% carbohydrate-electrolyte beverage on self-paced soccer-specific exercise performance. / Harper, Liam D.; Stevenson, Emma J.; Rollo, Ian; Russell, Mark.
In: Journal of Science and Medicine in Sport, Vol. 20, No. 12, 01.12.2017, p. 1123-1129.Research output: Contribution to journal › Article
TY - JOUR
T1 - The influence of a 12% carbohydrate-electrolyte beverage on self-paced soccer-specific exercise performance
AU - Harper, Liam D.
AU - Stevenson, Emma J.
AU - Rollo, Ian
AU - Russell, Mark
PY - 2017/12/1
Y1 - 2017/12/1
N2 - Objectives To assess the physiological and performance effects of a 12% carbohydrate-electrolyte beverage consumed at practically applicable time-points (i.e., before each half) throughout simulated soccer match-play. Design Randomised, counterbalanced, crossover. Methods Fed players (n = 15) performed 90-min of soccer-specific exercise (including self-paced exercise at the end of each half). Players consumed carbohydrate-electrolyte (CHO; 60 g × 500 ml−1, Na+ 205 mg × 500 ml−1), placebo-electrolyte (PL) or water (Wat) beverages at the end of the warm-up (250 ml) and half-time (250 ml plus ad-libitum water). Blood was drawn before each half and every 15-min during exercise. Physical (15-m sprinting, countermovement jumps, self-paced distance, acceleration/deceleration count), technical (dribbling) and cognitive (memory, attention, decision-making) performance was assessed. Ratings of perceived exertion (RPE) and abdominal discomfort were measured. Results Against Wat and PL, CHO increased (all p < 0.05) mean accelerations >1.5 m·s−2 during self-paced exercise (>+25%) and dribbling speed from 60-min onwards (>+3%). Mean sprinting speed improved (+2.7%) in CHO versus Wat. Blood glucose increased before and during each half in CHO versus PL and Wat (all p < 0.05). A 27% decline in glycaemia occurred at 60-min in CHO. RPE was comparable between trials. Cognition reduced post-exercise (p < 0.05); this decline was not attenuated by CHO. Abdominal discomfort increased during exercise but was similar between trials. Conclusions Using more realistic fluid ingestion timings than have been examined previously, consuming a 12% carbohydrate-electrolyte beverage increased blood glucose, self-paced exercise performance, and improved dribbling speed in the final 30-min of exercise compared to water and placebo. Carbohydrates did not attenuate post-exercise reductions in cognition
AB - Objectives To assess the physiological and performance effects of a 12% carbohydrate-electrolyte beverage consumed at practically applicable time-points (i.e., before each half) throughout simulated soccer match-play. Design Randomised, counterbalanced, crossover. Methods Fed players (n = 15) performed 90-min of soccer-specific exercise (including self-paced exercise at the end of each half). Players consumed carbohydrate-electrolyte (CHO; 60 g × 500 ml−1, Na+ 205 mg × 500 ml−1), placebo-electrolyte (PL) or water (Wat) beverages at the end of the warm-up (250 ml) and half-time (250 ml plus ad-libitum water). Blood was drawn before each half and every 15-min during exercise. Physical (15-m sprinting, countermovement jumps, self-paced distance, acceleration/deceleration count), technical (dribbling) and cognitive (memory, attention, decision-making) performance was assessed. Ratings of perceived exertion (RPE) and abdominal discomfort were measured. Results Against Wat and PL, CHO increased (all p < 0.05) mean accelerations >1.5 m·s−2 during self-paced exercise (>+25%) and dribbling speed from 60-min onwards (>+3%). Mean sprinting speed improved (+2.7%) in CHO versus Wat. Blood glucose increased before and during each half in CHO versus PL and Wat (all p < 0.05). A 27% decline in glycaemia occurred at 60-min in CHO. RPE was comparable between trials. Cognition reduced post-exercise (p < 0.05); this decline was not attenuated by CHO. Abdominal discomfort increased during exercise but was similar between trials. Conclusions Using more realistic fluid ingestion timings than have been examined previously, consuming a 12% carbohydrate-electrolyte beverage increased blood glucose, self-paced exercise performance, and improved dribbling speed in the final 30-min of exercise compared to water and placebo. Carbohydrates did not attenuate post-exercise reductions in cognition
KW - Football
KW - Skill
KW - Sucrose
KW - Maltodextrin
KW - Isomaltulose
U2 - 10.1016/j.jsams.2017.04.015
DO - 10.1016/j.jsams.2017.04.015
M3 - Article
VL - 20
SP - 1123
EP - 1129
JO - Journal of Science and Medicine in Sport
T2 - Journal of Science and Medicine in Sport
JF - Journal of Science and Medicine in Sport
SN - 1440-2440
IS - 12
ER -