Object

Place of publication:

Poznań

Format:

pp.117-125; 30 cm

NumberOfPages:

9

Previous title:

click here to follow the link ; Studies in Physical Culture and Tourism

Is part of:

Trends in Sport Sciences 2018 Vol.25 No.3

Abstract:

Introduction. Restricted carbohydrate diets (RCDs) have become popular amongst endurance athletes as a means of increasing fat oxidation and improving health outcomes. However, it is unclear if these adaptations improve exercise performance. Aim of Study. This case study investigated the effect of a three-week RCD on exercise metabolism and performance, alongside evaluating the subjective experiences, of three recreational cyclists. Material and Methods. Participants were randomly assigned to the normal diet (ND) (~50% CHO, ~30% fat, ~20% protein) or RCD (10% carbohydrate, 70% fat and 20% protein) and switched diets after three weeks. The participant’s performed a weekly laboratory assessment consisting of an incremental, sub-maximal cycling step-test and a 20-minute time trial (TT). Body fat (skinfold) measures were repeated after each diet and the participants recorded their food/drink intake using a smartphone app throughout the study. Results. Whole body peak fat oxidation, measured during sub-maximal cycling, markedly increased during the RCD (ND 0.61 ± 0.1 vs RCD 1.45 ± 0.3 g/min). There was no improvement in average power output during the TT for any participant following the RCD (243 ± 5 W) versus the ND (253 ± 5 W) condition. Two participants experienced a reduction (–8% and –10%) in (Σ7) skinfolds following the RCD. The participants’ subjective reports indicated an improvement in general dietary habits, but there were reports of increased perceived exertion to exercise during the RCD. Conclusions. The RCD increased whole-body fat oxidation, promoted positive subjective dietary habits and decreased body fat amongst amateur cyclists. However, these outcomes did not translate into improved exercise performance

Language:

eng

ISBN/ISSN:

2299-9590

DOI:

10.23829/TSS.2018.25.3-1

Publisher:

Akademia Wychowania Fizycznego w Poznaniu

Rights Management:

Akademia Wychowania Fizycznego w Poznaniu ; Biblioteka Akademii Wychowania Fizycznego w Poznaniu

Rights:

wszystkie prawa zastrzeżone

Access rights:

dla wszystkich w zakresie dozwolonego użytku

License:

udostępnianie na podstawie umowy z właścicielem majątkowych praw autorskich

Rights holder:

Akademia Wychowania Fizycznego w Poznaniu

Digitisation:

Biblioteka Akademii Wychowania Fizycznego w Poznaniu

Location of original object:

Biblioteka Akademii Wychowania Fizycznego w Poznaniu

Digital object format:

application/pdf