The effects of glucose-fructose co-ingestion on repeated performance during a day of intensified rugby union training in professional academy players: Fructose and rugby recovery

Aaron Hengist, Jon Watkins, Harry Smith, Rob Edinburgh, James Betts, Gregory Roe, Javier Gonzalez

Research output: Contribution to journalArticlepeer-review

Abstract

This study assessed the effects of glucose-fructose co-ingestion during recovery from high-intensity rugby training on subsequent performance. Nine professional, senior academy Rugby Union players performed two trials in a double-blind, randomized, crossover design. Identical rugby training sessions were separated by a 3-hour recovery period, during which participants ingested protein (0.3 g×kg BM×h -1) and carbohydrate-containing (0.8 g×kg BM×h -1) recovery drinks, comprised of glucose polymers (GLUCOSE ONLY) or a glucose-fructose mixture (GLUCOSE+FRUCTOSE). Performance outcomes were determined from global positioning systems combined with accelerometry and heart rate monitoring. Mean speed during sessions 1 (am) and 2 (pm) of GLUCOSE ONLY was (mean±SD) 118±6 and 117±4 m×min -1, respectively. During GLUCOSE+FRUCTOSE, mean speed during session 1 and 2 was 117±4 and 116±5 m×min -1, respectively (time x trial interaction, p = 0.61). Blood lactate concentrations were higher throughout recovery in GLUCOSE+FRUCTOSE (mean ±SD: 1-h 3.2 ±2.0 mmol×L -1; 3-h 2.1 ±1.2 mmol×L -1) compared to GLUCOSE ONLY (1-h 2.0 ±1.0 mmol×L -1; 3-h 1.4 ±1.0 mmol×L -1; trial effect p = 0.05). Gastrointestinal discomfort low in both conditions. These data suggest glucose-fructose mixtures consumed as protein-carbohydrate recovery drinks following rugby training do not enhance subsequent performance compared to glucose-based recovery drinks.

Original languageEnglish
Pages (from-to)1144-1152
Number of pages9
JournalJournal of Sports Sciences
Volume39
Issue number10
Early online date15 Dec 2020
DOIs
Publication statusPublished - 31 Dec 2021

Keywords

  • Fructose
  • glucose
  • intermittent exercise
  • performance
  • recovery

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Fingerprint

Dive into the research topics of 'The effects of glucose-fructose co-ingestion on repeated performance during a day of intensified rugby union training in professional academy players: Fructose and rugby recovery'. Together they form a unique fingerprint.

Cite this