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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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A COMPARISON BETWEEN VENTILATION AND HEART RATE AS INDICATOR OF OXYGEN UPTAKE DURING DIFFERENT INTENSITIES OF EXERCISE |
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Steven Gastinger1  ,
Anthony Sorel1, Guillaume Nicolas1, Arlette Gratas-Delamarche1
and Jacques Prioux2 |
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1M2S Laboratory, Physiology and Biomechanics, UFR APS University of Rennes 2, 35044 Rennes Cedex, France 2ENS - Cachan, Antenne de Bretagne, Campus de Ker-Lann, 35170 Bruz Cedex, France. |
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© Journal of Sports Science and Medicine (2010) 9, 110 - 118 |
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| ABSTRACT | |||
| The aim of this study is to compare the relation between ventilation
(VE) and oxygen uptake (VO2) [VO2=ƒ(VE)]
and between heart rate (HR) and VO2 [VO2=ƒ(HR)].
Each one of the subjects performed three types of activities of different
intensities (walking without load, walking with load and intermittent work).
VO2, VE, and HR were measured continuously by using indirect
calorimetry and an electrocardiogram. Linear regressions and coefficients
of determination (r²) were calculated to compare the relation VO2
=ƒ(VE) and VO2 =ƒ(HR)
for two different regroupings: by session duration (r²session) and by subject
(r²subject). Results showed that r²session of the relation VO2
=ƒ(VE) were significantly higher than those of
the relation VO2 =ƒ(HR) for steady state
activities (walking with or without load during 3 or 6 min, p < 0.01)
and for activities without oxygen consumption steady state (walking with
or without load during 1 min, p < 0.01 and intermittent work, p <
0.05). VE is more strongly correlated with VO2 than with HR.
This is a very promising approach to develop a new method to estimate energy
expenditure.
Key words: Physical activities, light to moderate intensities, steady state activities, non-steady state activities. |
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