The Effect of Postexercise Carbohydrate and Protein Ingestion on Bone Metabolism

Townsend, Rebecca, Elliott-Sale, Kirsty J., Currell, Kevin, Tang, Jonathan, Fraser, William D. and Sale, Craig (2017) The Effect of Postexercise Carbohydrate and Protein Ingestion on Bone Metabolism. Medicine & Science in Sports & Exercise, 49 (6). pp. 1209-1218. ISSN 0195-9131

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Abstract

Purpose: To investigate the effect of feeding carbohydrate and protein (CHO+PRO), immediately or 2 h after an exhaustive run, on the bone turnover response in endurance runners. Methods: 10 men (age 28+/-5 y, height 1.74+/-0.05 m, body mass 69.7+/-6.3 kg) performed treadmill running at 75%VO2max, until exhaustion, on three occasions. Blood was collected before and immediately, 1, 2, 3, 4 and 24 h post-exercise, for measurement of [beta]-CTX, P1NP, PTH, PO4, ACa and Ca2+. This was a randomised, counterbalanced, placebo-controlled, single-blinded, cross-over study. The three trials were; i) placebo (PLA), PLA solution was ingested immediately and 2 h post-exercise, ii) immediate feeding (IF), CHO+PRO (1.5 g.kgBM-1 dextrose and 0.5 g.kgBM-1 whey) were ingested immediately post-exercise and PLA 2 h post-exercise, and iii) delayed feeding (DF), PLA was ingested immediately post-exercise and CHO+PRO solution 2 h post-exercise. Data were analysed using repeated measures ANOVA and post-hoc Tukey's HSD. Results: At 1 and 2 h post-exercise, [beta]-CTX concentrations were lower in the IF trial than the DF and PLA trials (P<=0.001). At 3 h post-exercise, [beta]-CTX concentrations were higher in the PLA trial than the IF (P<=0.001) and DF trials (P=0.026). At 4 h post-exercise, [beta]-CTX concentrations were lower in the DF trial than the IF (P=0.003) and PLA trials (P<=0.001). At 4 h post-exercise, P1NP was higher in the IF trial than in DF (P=0.026) and PLA trials (P=0.001). At 3 h post-exercise, PTH was higher in the IF trial than the DF trial (P<=0.001). Conclusions: Following exhaustive running, immediate ingestion of CHO+PRO may be beneficial, as it decreases bone resorption marker concentrations and increases bone formation marker concentrations; creating a more positive bone turnover balance.

Item Type: Article
Uncontrolled Keywords: bone resorption,bone formation,post-exercise feeding,endurance athletes
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
Depositing User: Pure Connector
Date Deposited: 27 Jan 2017 02:12
Last Modified: 05 Nov 2020 00:49
URI: https://ueaeprints.uea.ac.uk/id/eprint/62213
DOI: 10.1249/MSS.0000000000001211

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