PMID- 11072770
OWN - NLM
STAT- MEDLINE
DCOM- 20010531
LR  - 20131121
IS  - 1439-6319 (Print)
IS  - 1439-6319 (Linking)
VI  - 83
IP  - 1
DP  - 2000 Sep
TI  - The effects of 3000-m swimming on subsequent 3-h cycling performance: 
      implications for ultraendurance triathletes.
PG  - 28-33
AB  - The purpose of this study was to examine the physiological effects of 3000-m 
      swimming on subsequent 3-h cycling time trial performance in ultraendurance 
      triathletes. Eight highly trained ultraendurance triathletes [mean (SEM) age 34 
      (2) years, body fat 12.5 (0.8)%, maximum oxygen consumption 63.2 (2.1) ml x 
      kg(-1) x min(-1)] completed two randomly assigned trials 1 week apart. The 
      swim/bike trial (SB) involved 3000 m of swimming [min:s 52:28 (1:48)] immediately 
      followed by a 3-h cycling performance at a self-selected time-trial pace. The 
      control trial (CON) consisted of an identical 3-h cycling time trial but without 
      prior swimming. Subjects consumed an 8% carbohydrate (CHO)/electrolyte beverage 
      during both trials at the rate of 60 g CHO x h(-1) and 1 l x h(-1). No 
      significant differences were evident between CON and SB on the dependent measures 
      (CON vs. SB): power output [W, 222 (14) W vs. 212 (13) W], heart rate [fc, 147 
      (5) beats x min(-1) vs. 143 (4) beats min(-1); %fcmax 80.0 (1.6)% vs. 78.4 
      (1.5)%], oxygen uptake [3.10 (0.12) l x min(-1) vs. 2.97 (0.15) l x min(-1)], 
      minute ventilation [82.5 (4.4) l x min(-1) vs. 77.3 (3.7) l x min(-1)], rating of 
      perceived exertion [14.6 (0.4) vs. 14.0 (0.1)], blood lactate [6.1 (0.5) mmol x 
      l(-1) vs. 4.8 (0.5) mmol x l(-1)], and blood glucose [5.0 (0.2) mmol x l(-1) vs. 
      5.3 (0.1) mmol x l(-1); all non-significant at the P>0.05 level]. However, the 
      CON respiratory exchange ratio was significantly greater than for SB [0.91 (0.01) 
      vs. 0.89 (0.01); P<0.05], suggesting that the SB trial required a greater 
      reliance on lipid as a fuel substrate. Hence, the main finding in the present 
      study was that 3000 m of swimming had no significant performance effect (in terms 
      of W) on subsequent 3-h cycling performance in ultraendurance triathletes.
FAU - Laursen, P B
AU  - Laursen PB
AD  - J.M. Buchanan Exercise Science Laboratory, School of Human Kinetics, University 
      of British Columbia, Vancouver, Canada.
FAU - Rhodes, E C
AU  - Rhodes EC
FAU - Langill, R H
AU  - Langill RH
LA  - eng
PT  - Clinical Trial
PT  - Journal Article
PT  - Randomized Controlled Trial
PL  - Germany
TA  - Eur J Appl Physiol
JT  - European journal of applied physiology
JID - 100954790
RN  - 0 (Blood Glucose)
RN  - 0 (Carbohydrates)
RN  - 0 (Electrolytes)
RN  - 33X04XA5AT (Lactic Acid)
SB  - IM
MH  - Adult
MH  - Beverages
MH  - Bicycling/*physiology
MH  - Blood Glucose/metabolism
MH  - Carbohydrates/administration & dosage
MH  - Electrolytes/administration & dosage
MH  - Heart Rate
MH  - Humans
MH  - Lactic Acid/blood
MH  - Male
MH  - Oxygen Consumption
MH  - Physical Endurance/*physiology
MH  - Respiration
MH  - Swimming/*physiology
EDAT- 2000/11/10 11:00
MHDA- 2001/06/02 10:01
CRDT- 2000/11/10 11:00
PHST- 2000/11/10 11:00 [pubmed]
PHST- 2001/06/02 10:01 [medline]
PHST- 2000/11/10 11:00 [entrez]
AID - 10.1007/s004210000229 [doi]
PST - ppublish
SO  - Eur J Appl Physiol. 2000 Sep;83(1):28-33. doi: 10.1007/s004210000229.