by Stephen R Stannard, Alex J Buckley, Johann A Edge and Martin W Thompson
Abstract:
Minimising carbohydrate (CHO) status in the peri-training period may accelerate the training adaptations normally observed. The aim of this study was to compare adaptations to endurance training undertaken in the acutely CHO fed and overnight-fasted states. Eight female and six male untrained, healthy participants: aged 26.6+/-5.8 years (mean+/-SD); height 174.7+/-7.6 cm; weight 75.3+/-11.4 kg; VO(2max) 3.48+/-0.67 l/min; were randomly divided into two training groups and undertook four weeks of five days per week endurance cycle ergometer training in either the overnight-fasted (FAST) or acutely fed (FED) state. FAST training had no effect on RER or plasma glucose, lactate and FFA concentrations during subsequent submaximal exercise. Training-induced changes in Vastus lateralis citrate synthase (CS) and 3-hydroxy-CoA dehydrogenase (HAD) activities were not different between training groups (P=0.655 and 0.549, respectively), but when the effect of gender was considered, men responded better to FAST and women responded better to FED. The FAST group showed a significantly greater training-induced increase in VO(2max) and resting muscle glycogen concentration than FED (P=0.014 and P=0.047 respectively), but there was no gender interaction. In conclusion, these results suggest that (a) meal ingestion prior to daily exercise can modify some of the exercise training-induced adaptations normally seen with endurance training compared to when daily exercise is undertaken in the overnight-fasted state; and (b) the extent of these adaptations in skeletal muscle differ slightly between men and women.
Reference:
Adaptations to skeletal muscle with endurance exercise training in the acutely fed versus overnight-fasted state. (Stephen R Stannard, Alex J Buckley, Johann A Edge and Martin W Thompson), In J Sci Med Sport, volume 13, 2010.
Bibtex Entry:
@article{Stannard:2010aa,
abstract = {Minimising carbohydrate (CHO) status in the peri-training period may accelerate the training adaptations normally observed. The aim of this study was to compare adaptations to endurance training undertaken in the acutely CHO fed and overnight-fasted states. Eight female and six male untrained, healthy participants: aged 26.6+/-5.8 years (mean+/-SD); height 174.7+/-7.6 cm; weight 75.3+/-11.4 kg; VO(2max) 3.48+/-0.67 l/min; were randomly divided into two training groups and undertook four weeks of five days per week endurance cycle ergometer training in either the overnight-fasted (FAST) or acutely fed (FED) state. FAST training had no effect on RER or plasma glucose, lactate and FFA concentrations during subsequent submaximal exercise. Training-induced changes in Vastus lateralis citrate synthase (CS) and 3-hydroxy-CoA dehydrogenase (HAD) activities were not different between training groups (P=0.655 and 0.549, respectively), but when the effect of gender was considered, men responded better to FAST and women responded better to FED. The FAST group showed a significantly greater training-induced increase in VO(2max) and resting muscle glycogen concentration than FED (P=0.014 and P=0.047 respectively), but there was no gender interaction. In conclusion, these results suggest that (a) meal ingestion prior to daily exercise can modify some of the exercise training-induced adaptations normally seen with endurance training compared to when daily exercise is undertaken in the overnight-fasted state; and (b) the extent of these adaptations in skeletal muscle differ slightly between men and women.},
address = {Institute of Food Nutrition and Human Health, Massey University, Palmerston North, New Zealand. S.Stannard@massey.ac.nz},
author = {Stannard, Stephen R and Buckley, Alex J and Edge, Johann A and Thompson, Martin W},
copyright = {Copyright 2010 Sports Medicine Australia. All rights reserved.},
crdt = {2010/05/11 06:00},
date = {2010 Jul},
date-added = {2023-01-02 19:39:32 +0000},
date-modified = {2023-01-08 12:33:03 +0000},
dcom = {20101108},
dep = {20100507},
doi = {10.1016/j.jsams.2010.03.002},
edat = {2010/05/11 06:00},
issn = {1878-1861 (Electronic); 1878-1861 (Linking)},
jid = {9812598},
journal = {J Sci Med Sport},
jt = {Journal of science and medicine in sport},
keywords = {Athletic Performance, Fasting; Muscle, Exercise},
language = {eng},
lid = {10.1016/j.jsams.2010.03.002 {$[$}doi{$]$}},
lr = {20220318},
mh = {Adaptation, Physiological/*physiology; Adult; Citrate (si)-Synthase/metabolism; Fasting/*physiology; Female; Glycogen/metabolism; Humans; Male; Muscle, Skeletal/*physiology; Oxygen Consumption; Physical Endurance/*physiology; Young Adult},
mhda = {2010/11/09 06:00},
month = {Jul},
number = {4},
own = {NLM},
pages = {465--469},
phst = {2009/02/11 00:00 {$[$}received{$]$}; 2009/12/21 00:00 {$[$}revised{$]$}; 2010/03/17 00:00 {$[$}accepted{$]$}; 2010/05/11 06:00 {$[$}entrez{$]$}; 2010/05/11 06:00 {$[$}pubmed{$]$}; 2010/11/09 06:00 {$[$}medline{$]$}},
pii = {S1440-2440(10)00073-3},
pl = {Australia},
pmid = {20452283},
pst = {ppublish},
pt = {Journal Article; Randomized Controlled Trial},
rn = {9005-79-2 (Glycogen); EC 2.3.3.1 (Citrate (si)-Synthase)},
sb = {IM},
status = {MEDLINE},
title = {Adaptations to skeletal muscle with endurance exercise training in the acutely fed versus overnight-fasted state.},
volume = {13},
year = {2010},
bdsk-url-1 = {https://doi.org/10.1016/j.jsams.2010.03.002}}