No changes during pregnancy in the net cost of cycling exercise.
Eur J Clin Nutr
; 48(7): 513-21, 1994 Jul.
Article
in En
| MEDLINE
| ID: mdl-7956994
OBJECTIVE: To investigate whether work efficiency improves during pregnancy. DESIGN: Longitudinal; energy expenditure measurements (ventilated hood system) before the onset of pregnancy and in weeks 13, 24 and 35 of gestation. SUBJECTS: Healthy Dutch women (n = 26), recruited with advertisements in local newspapers and posters displayed in public buildings. MAIN OUTCOME MEASURES: Resting metabolic rate (RMR); metabolic rate during cycling at workloads of 30, 45, 60 and 75 W (CMRgross); post-cycling metabolic rate (PCMRgross); net energy costs of cycling (CMRnet = CMRgross - RMR); net recovery costs after cycling exercise (PCMRnet = PCMRgross - RMR). RESULTS: RMR, CMRgross and PCMRgross increased during pregnancy; under all conditions, metabolic rates were 0.9 kJ/min higher at 35 weeks gestation than before pregnancy (P < 0.05). CMRnet and PCMRnet showed no significant change during gestation. CONCLUSIONS: Changes in metabolic rate during cycling exercise suggest that pregnancy does not induce an improvement of work efficiency.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Pregnancy
/
Energy Metabolism
/
Exercise Test
/
Physical Exertion
Type of study:
Health_economic_evaluation
/
Observational_studies
Limits:
Adult
/
Female
/
Humans
Language:
En
Journal:
Eur J Clin Nutr
Journal subject:
CIENCIAS DA NUTRICAO
Year:
1994
Document type:
Article
Affiliation country:
Netherlands
Country of publication:
United kingdom