A lesson I learned long ago is not to let one study carry too much weight.
If it is replicated often enough then it takes on weight.
Again, my pet peeve, 7 subjects!
"Ignoramus4980" <[email hidden]> wrote in message
news:[email hidden]...
Quoted message said:Carbohydrate loading failed to improve 100-km cycling performance in a
placebo-controlled trial
Quoted message said:
Louise M. Burke1, John A. Hawley2, Elske J. Schabort3, Alan St Clair
Gibson3, Iigo Mujika4, and Timothy D. Noakes3
Quoted message said:
1 Department of Sports Nutrition, Australian Institute of Sport,
Belconnen, Canberra, Australian Capital Territory 2616; 2 Exercise
Metabolism Group, Department of Human Biology and Movement Science,
Royal Melbourne Institute of Technology University, Bundoora, Victoria
3083; 3 Medical Research Council/University of Cape Town Bioenergetics
of Exercise Research Unit, Department of Physiology, University of
Cape Town Medical School, Cape Town 7701, South Africa; and 4
Departmento de Investigacin y Desarollo Servicios Mdicos, Athletic
Club de Bilbao, Basque Country, SpainWe evaluated the effect of carbohydrate (CHO) loading on cycling
performance that was designed to be similar to the demands of competitive
road racing. Seven well-trained cyclists performed two 100-km time
trials (TTs) on separate occasions, 3 days after either a CHO-loading
(9 g CHO kg body mass1 day1) or placebo-controlled moderate-CHO diet
(6 g CHO kg body mass1 day1). A CHO breakfast (2 g CHO/kg body mass)
was consumed 2 h before each TT, and a CHO drink (1 g CHO kg.body
mass1 h1) was consumed during the TTs to optimize CHO availability. The
100-km TT was interspersed with four 4-km and five 1-km sprints. CHO
loading significantly increased muscle glycogen concentrations (572 107
vs. 485 128 mmol/kg dry wt for CHO loading and placebo, respectively; P <
0.05). Total muscle glycogen utilization did not differ between trials,
nor did time to complete the TTs (147.5 10.0 and 149.1 11.0 min; P =
0.4) or the mean power output during the TTs (259 40 and 253 40 W, P =
0.4). This placebo-controlled study shows that CHO loading did not improve
performance of a 100-km cycling TT during which CHO was consumed. By
preventing any fall in blood glucose concentration, CHO ingestion during
exercise may offset any detrimental effects on performance of lower
preexercise muscle and liver glycogen concentrations. Alternatively,
part of the reported benefit of CHO loading on subsequent athletic
performance could have resulted from a placebo effect.glycogen loading; road cycling; blood glucose