Apple puree as a natural fructose source provides an effective alternative carbohydrate source for fuelling half‐marathon running performance

Author:

Reynolds Kirsty M.1,Juett Loris A.1,Funnell Mark P.1,Schofield Joshua B.1,Grundig Claire1,Melidis George1,Brown Alexander1,Hubbard Will1,Luo Yuxuan1,Almahaireh Ibrahim1,James Lewis J.1,Mears Stephen A.1

Affiliation:

1. School of Sport, Exercise and Health Sciences Loughborough University Loughborough UK

Abstract

ABSTRACTCarbohydrate supplementation during endurance exercise is known to improve performance, but the effects of food‐based approaches in running exercise are understudied. Therefore, this study investigated the performance and gastrointestinal (GI) effects of a carbohydrate supplement containing a natural fructose source compared with a highly processed fructose source in a combined glucose‐fructose supplement, during a half‐marathon. Eleven trained runners (9 males, 2 females; age 32 ± 8 y, 89:53 ± 13:28 min half‐marathon personal record) completed a familiarisation (8 miles) and two experimental trials (13.1 miles) on an outdoor running course, with blood and urine samples collected before and after the run. Subjective GI measures were made throughout the run. Carbohydrate was provided as a natural fructose source in the form of apple puree (AP) or highly processed crystalline fructose (GF) in a 2:1 glucose‐to‐fructose ratio (additional required glucose was provided through maltodextrin). Half‐marathon performance was not different between carbohydrate sources (AP 89:52 ± 09:33 min, GF 88:44 ± 10:09 min; P = 0.684). There were no interaction effects for GI comfort (P = 0.305) or other GI symptoms (P ≥ 0.211). There were no differences between carbohydrate sources in ad libitum fluid intake (AP 409 ± 206 mL; GF 294 ± 149 mL; P = 0.094) or any other urinary (P ≥ 0.724), blood‐based (P ≥ 0.215) or subjective (P ≥ 0.421) measures. Apple puree as a natural fructose source was equivalent to crystalline fructose in supporting half‐marathon running performance without increasing GI symptoms.

Funder

Loughborough University

Decathlon SA

Publisher

Wiley

Subject

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

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