PMID- 2663741
OWN - NLM
STAT- MEDLINE
DCOM- 19890825
LR  - 20041117
IS  - 0172-4622 (Print)
IS  - 0172-4622 (Linking)
VI  - 10 Suppl 1
DP  - 1989 May
TI  - Eating, drinking, and cycling. A controlled Tour de France simulation study, Part 
      I.
PG  - S32-40
AB  - Sustained exhausting exercise is thought to depress appetite and food intake. The 
      aim of the present investigation was to study the effect of intensive cycling 
      exercise, with an energy expenditure comparable to values derived from the Tour 
      de France, on food and fluid intake, energy balance, nitrogen balance, and 
      nutrient oxidation. Thirteen highly trained cyclists consuming a normal 
      carbohydrate (CHO)-rich diet (60 En%) were studied during a 7-day stay in a 
      respiration chamber. Two preparation days were followed by a standardized resting 
      day (3), after which the subjects completed two exhausting exercise days (4-5). 
      On day 6 the standardized resting day was repeated. Food and fluid intake were 
      measured by weighed procedure. Energy expenditure was calculated from continuous 
      gas analysis. Energy and nitrogen losses were calculated from all measured 
      excretes. The results showed that energy balance (EB) and nitrogen balance (NB) 
      were positive on the first resting day and became negative on the exercise days. 
      EB was positive again on the recovery day whereas NB remained negative. Nitrogen 
      losses almost balanced N intakes (1.7 g.kg-1) indicating an increased protein 
      requirement. CHO oxidation exceeded CHO intake indicating endogenous CHO 
      depletion. Contribution of CHO to energy exchange decreased from 51.4% +/- 3.1% 
      on day 4 to 40.6% +/- 3.4% on day 5; this decrease was compensated by an 
      increased fat oxidation. The food consumption pattern during days 4 and 5 was not 
      different from days 2 and 6. In-between meal consumption accounted for 
      30.5%-34.3% of total energy intake. Fluid consumption was adequate to compensate 
      for the losses.(ABSTRACT TRUNCATED AT 250 WORDS)
FAU - Brouns, F
AU  - Brouns F
AD  - Department of Human Biology, University of Limburg, Maastricht, The Netherlands.
FAU - Saris, W H
AU  - Saris WH
FAU - Stroecken, J
AU  - Stroecken J
FAU - Beckers, E
AU  - Beckers E
FAU - Thijssen, R
AU  - Thijssen R
FAU - Rehrer, N J
AU  - Rehrer NJ
FAU - ten Hoor, F
AU  - ten Hoor F
LA  - eng
PT  - Journal Article
PT  - Review
PL  - Germany
TA  - Int J Sports Med
JT  - International journal of sports medicine
JID - 8008349
SB  - IM
MH  - Adult
MH  - *Bicycling
MH  - *Drinking
MH  - *Eating
MH  - *Energy Metabolism
MH  - Humans
MH  - Male
MH  - *Sports
RF  - 41
EDAT- 1989/05/01 00:00
MHDA- 1989/05/01 00:01
CRDT- 1989/05/01 00:00
PHST- 1989/05/01 00:00 [pubmed]
PHST- 1989/05/01 00:01 [medline]
PHST- 1989/05/01 00:00 [entrez]
AID - 10.1055/s-2007-1024952 [doi]
PST - ppublish
SO  - Int J Sports Med. 1989 May;10 Suppl 1:S32-40. doi: 10.1055/s-2007-1024952.