Sammenligning av fettoksideringen og energiforbruket under intervalltrening og kontinuerlig trening blant godt trente menn
Master thesis
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http://hdl.handle.net/11250/138938Utgivelsesdato
2011Metadata
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Sammendrag
Background: This study was conducted on the basis of the limited literature on fat
metabolism among well-trained men during high-intensive training. Purpose: We have: 1)
quantified the total energy expenditure and the substrate oxidation among well-trained men,
during a high-intensity interval session and a continuous session matched for average
workload, 2) compared the relative fat oxidation during a high-intensity interval session and a
continuous session to the maximal fat oxidation rate identified by the Fatmax protocol of
Achten, Gleeson and Jeukendrup and 3) compared the energy expenditure after a highintensity
interval session and a continuous session, based on EPOC. Methods: Nine welltrained
male runners (VO2max: 68.1 + 3.6 ml.kg-1.min-1) completed preliminary testing
followed by an interval session and a continuous session in randomised order. Blood lactate
(La-) and blood gases were measured. The sessions lasted 48 minutes at a 1.7% incline.
Individual running velocities were calculated corresponding to 40, 65 and 90% of VO2max.
Results: Fat oxidation accounted for 17 + 8% (0.27 + 0.11 g.min-1) of the total energy
expenditure during the interval session. The blood gases stabilized from work bout one to six.
La- rose moderately, but significantly from work bout three to six. Fatmax was located at 65 +
8% of VO2max (0.55 + 0.17 g.min-1). Energy expenditure based on EPOC was higher, but not
significant for the continuous session compared to the interval session. Conclusion: The
subjects oxidized significant amounts of fat during a high-intensity interval session. The
energy expenditure based on EPOC was greater, but non significant after the continuous
session compared to the interval session.
Key words: indirect calorimetry, fat metabolism, energy expenditure, intermittent exercise.
Beskrivelse
Masteroppgave i idrettsvitenskap -Universitetet i Agder 2011