Back to Search
Start Over
Oxygen uptake dynamics during high-intensity exercise in children and adults
- Source :
- Armon, Y; Cooper, DM; Flores, R; Zanconato, S; & Barstow, TJ. (1991). Oxygen uptake dynamics during high-intensity exercise in children and adults.. Journal of applied physiology (Bethesda, Md. : 1985), 70(2), 841-848. doi: 10.1152/jappl.1991.70.2.841. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/24d96392
- Publication Year :
- 1991
- Publisher :
- eScholarship, University of California, 1991.
-
Abstract
- We hypothesized that the O2 uptake (Vo2) response to high-intensity exercise would be different in children than in adults. To test this hypothesis, 22 children (6-12 yr old) and 7 adults (27-40 yr old) performed 6 min of constant-work-rate cycle-ergometer exercise. Sixteen children performed a single test above their anaerobic threshold (AT). In a separate protocol, six children and all adults exercised at low and high intensity. Low-intensity exercise corresponded to the work rate at 80% of each subject's AT. High-intensity exercise (above the AT) was determined first by calculating the difference in work rate between the AT and the maximal Vo2 (delta). Twenty-five, 50, and 75% of this difference were added to the work rate at the subject's AT, and these work rates were referred to as 25% delta, 50% delta, and 75% delta. For exercise at 50% delta and 75% delta, Vo2 increased throughout exercise (O2 drift, linear regression slope of Vo2 as a function of time from 3 to 6 min) in all the adults, and the magnitude of the drift was correlated with increasing work rates in the above-AT range (r = 0.91, P less than 0.0001). In contrast, no O2 drift was observed in over half of the children during above-AT exercise. The O2 drifts were much higher in adults (1.76 +/- 0.63 ml O2.kg-1.min-2 at 75% delta) than in children (0.20 +/- 0.42, P less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)
- Subjects :
- Delta
Adult
Male
Physiology
Physical exercise
OXYGEN DRIFT
Work rate
Models, Biological
Medical and Health Sciences
Single test
DEVELOPMENT
Animal science
Oxygen Consumption
Physiology (medical)
Medicine
Humans
Anaerobiosis
Exercise physiology
Child
Exercise
ANAEROBIC THRESHOLD
business.industry
Pulmonary Gas Exchange
High intensity
Age Factors
Biological Sciences
Oxygen uptake
OXYGEN COST
GAS EXCHANGE
GROWTH
Female
business
Anaerobic exercise
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Armon, Y; Cooper, DM; Flores, R; Zanconato, S; & Barstow, TJ. (1991). Oxygen uptake dynamics during high-intensity exercise in children and adults.. Journal of applied physiology (Bethesda, Md. : 1985), 70(2), 841-848. doi: 10.1152/jappl.1991.70.2.841. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/24d96392
- Accession number :
- edsair.doi.dedup.....1e3a556c1e08ed061f019264bcb8c442