PMID- 23436623
OWN - NLM
STAT- MEDLINE
DCOM- 20140331
LR  - 20191112
IS  - 1543-2742 (Electronic)
IS  - 1526-484X (Linking)
VI  - 23
IP  - 4
DP  - 2013 Aug
TI  - The impact of making weight on physiological and cognitive processes in elite 
      jockeys.
PG  - 399-408
AB  - PURPOSE: To examine the impact of making weight on aerobic work capacity and 
      cognitive processes in a group of professional jockeys. METHODS: Nine male 
      jockeys and 9 age-, gender-, and BMI-matched controls were recruited to take part 
      in two experimental trials, conducted 48 hr apart. The jockeys were asked to 
      reduce their body mass by 4% in the 48 hr between trials, and controls maintained 
      usual dietary and physical activity habits between trials. Aerobic work capacity 
      was assessed by performance during an incremental cycle ergometer test. Motor 
      response, decision making, executive function, and working memory were assessed 
      using a computerized cognitive test battery. RESULTS: The jockey group 
      significantly reduced their body mass by 3.6 +/- 0.9% (p < .01). Mean urine 
      specific gravity (Usg) readings increased from 1.019 +/- 0.004-1.028 +/- 0.005 (p < 
      .01) following this reduction in body mass. Peak work capacity was significantly 
      reduced between trials in the jockey group (213 +/- 27 vs. 186 +/- 23 W, p < .01), 
      although VO2peak (46.4 +/- 3.7 vs. 47.2 +/- 6.3 ml.kg.min-1) remained unchanged. No 
      changes were identified for any cognitive variable in the jockey group between 
      trials. CONCLUSION: Simulation of race day preparation, by allocating a weight 
      that is 4% below baseline body mass caused all jockeys to report for repeat 
      testing in a dehydrated state, and a reduction in aerobic work capacity, both of 
      which may impact on racing performance.
FAU - Dolan, Eimear
AU  - Dolan E
AD  - School of Health Sciences, Robert Gordon University, Aberdeen, UK.
FAU - Cullen, SarahJane
AU  - Cullen S
FAU - McGoldrick, Adrian
AU  - McGoldrick A
FAU - Warrington, Giles D
AU  - Warrington GD
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130220
PL  - United States
TA  - Int J Sport Nutr Exerc Metab
JT  - International journal of sport nutrition and exercise metabolism
JID - 100939812
SB  - IM
MH  - Adolescent
MH  - Adult
MH  - Athletic Performance
MH  - Body Composition
MH  - Body Mass Index
MH  - *Body Weight
MH  - Case-Control Studies
MH  - Cognition/*physiology
MH  - Dehydration/*physiopathology
MH  - Diet
MH  - Ergometry
MH  - Humans
MH  - Male
MH  - Oxygen Consumption
MH  - Physical Exertion/*physiology
MH  - Sports/*physiology
MH  - Sports Nutritional Physiological Phenomena
MH  - Surveys and Questionnaires
MH  - Young Adult
EDAT- 2013/02/26 06:00
MHDA- 2014/04/01 06:00
CRDT- 2013/02/26 06:00
PHST- 2013/02/26 06:00 [entrez]
PHST- 2013/02/26 06:00 [pubmed]
PHST- 2014/04/01 06:00 [medline]
AID - 2012-0256 [pii]
AID - 10.1123/ijsnem.23.4.399 [doi]
PST - ppublish
SO  - Int J Sport Nutr Exerc Metab. 2013 Aug;23(4):399-408. doi: 
      10.1123/ijsnem.23.4.399. Epub 2013 Feb 20.