PMID- 10358130
OWN - NLM
STAT- MEDLINE
DCOM- 19990802
LR  - 20190513
IS  - 0022-3751 (Print)
IS  - 1469-7793 (Electronic)
IS  - 0022-3751 (Linking)
VI  - 517 ( Pt 3)
IP  - Pt 3
DP  - 1999 Jun 15
TI  - The effects of exercise and diet manipulation on the capacity to perform 
      prolonged exercise in the heat and in the cold in trained humans.
PG  - 919-30
AB  - 1. This study examined the effects of exercise and diet manipulation intended to 
      alter initial muscle glycogen levels on the capacity to perform prolonged 
      exercise at two ambient temperatures. 2. Six well-trained cyclists participated 
      in randomized order in two diet and exercise regimens each lasting 8 days and 
      comprising four cycle tests to exhaustion at 70 % of maximum oxygen uptake. On 
      days 1 and 5, subjects exercised to exhaustion to deplete muscle glycogen. Three 
      days after each depletion trial a diet providing 10 % (low carbohydrate (CHO)) or 
      80 % (high CHO) of energy as CHO was consumed, and each diet was followed by a 
      performance trial at the same ambient temperature, either 10 or 30 C (days 4 and 
      8). This schedule was repeated after a week, but performance trials were carried 
      out at the other ambient temperature. 3. In the cold, cycling time increased 
      (median (range)) from 89.2 min (78.0-129.5 min) on the low CHO trial to 158.2 min 
      (116.9-165.6 min) on the high CHO trial (P < 0.01). In the heat, cycling time 
      increased from 44.0 min (31.8-51.4 min) on the low CHO trial to 53.2 min 
      (50.2-82.2 min) on the high CHO trial (P = 0.02). Total CHO oxidized during 
      exercise in the cold after the low CHO diet was higher than in the heat after 
      either diet suggesting that exercise in the heat was terminated before all 
      available CHO stores had been emptied.
FAU - Pitsiladis, Y P
AU  - Pitsiladis YP
AD  - Department of Biomedical Sciences, University Medical School, Aberdeen AB25 2ZD, 
      UK.
FAU - Maughan, R J
AU  - Maughan RJ
LA  - eng
PT  - Clinical Trial
PT  - Comparative Study
PT  - Journal Article
PT  - Randomized Controlled Trial
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - J Physiol
JT  - The Journal of physiology
JID - 0266262
RN  - 0 (Blood Glucose)
RN  - 0 (Dietary Carbohydrates)
RN  - 0 (Lactates)
SB  - IM
MH  - Acclimatization
MH  - Adult
MH  - Blood Glucose/metabolism
MH  - *Body Temperature
MH  - Cold Temperature
MH  - *Diet
MH  - Dietary Carbohydrates
MH  - Energy Intake
MH  - Exercise/*physiology
MH  - Heart Rate
MH  - Hot Temperature
MH  - Humans
MH  - Lactates/blood
MH  - Oxygen Consumption
MH  - Physical Endurance/*physiology
MH  - Skin Temperature
MH  - Sports
MH  - Time Factors
PMC - PMC2269386
EDAT- 1999/06/08 00:00
MHDA- 1999/06/08 00:01
PMCR- 2000/06/15
CRDT- 1999/06/08 00:00
PHST- 1999/06/08 00:00 [pubmed]
PHST- 1999/06/08 00:01 [medline]
PHST- 1999/06/08 00:00 [entrez]
PHST- 2000/06/15 00:00 [pmc-release]
AID - PHY_8935 [pii]
AID - 10.1111/j.1469-7793.1999.0919s.x [doi]
PST - ppublish
SO  - J Physiol. 1999 Jun 15;517 ( Pt 3)(Pt 3):919-30. doi: 
      10.1111/j.1469-7793.1999.0919s.x.