Appl. Physiol. Nutr. Metab. Downloaded from www.nrcresearchpress.com by University of Otago on 11/04/15 For personal use only. This Just-IN manuscript is the accepted manuscript prior to copy editing and page composition. It may differ from the final official version of record.
Page 1 of 28
1
THE INTERRELATIONSHIP BETWEEN MUSCLE OXYGENATION, MUSCLE
2
ACTIVATION AND PULMONARY VO2 TO INCREMENTAL RAMP EXERCISE:
3
INFLUENCE OF AEROBIC FITNESS
4
Jan Boone1,2, Thomas J. Barstow3, Bert Celie1, Fabrice Prieur4, Jan Bourgois1,2
5
AFFILIATIONS
6
1
Department of Movement and Sport Sciences, Ghent University, Ghent, Belgium
7
2
Center of Sports Medicine, Ghent University Hospital, Ghent, Belgium
8
3
Kansas State University, Kansas, USA
9
4
Laboratoire CIAMS, Equipe MHAPS, Université Paris Sud-Université d’Orléans, Orléans,
10
France
11 12
CORRESPONDING AUTHOR:
13
Jan Boone
14
Watersportlaan 2
15
9000 Ghent
16
Belgium
17
Tel: +32 9 332 37 43
18
Fax: +32 9 264 64 84
19
[email protected]
20
21
22
23
1
Appl. Physiol. Nutr. Metab. Downloaded from www.nrcresearchpress.com by University of Otago on 11/04/15 For personal use only. This Just-IN manuscript is the accepted manuscript prior to copy editing and page composition. It may differ from the final official version of record.
Page 2 of 28
24
ABSTRACT
25
We investigated whether muscle and ventilatory responses to incremental ramp exercise
26
would be influenced by aerobic fitness status by means of a cross-sectional study with a large
27
subject population. Sixty-four male students (age: 21.2±3.2years) with a heterogeneous
28
VO2peak (51.9±6.3ml.min-1.kg-1, range 39.7-66.2ml.min-1.kg-1) performed an incremental
29
ramp cycle test (20-35Watt.min-1) to exhaustion. Breath-by-breath gas exchange was
30
recorded, and
31
electromyography (sEMG) and near-infrared spectroscopy (NIRS), respectively. The
32
integrated EMG (iEMG), Mean Power Frequency (MPF), deoxy[Hb+Mb] and total[Hb+Mb]
33
responses were set out as functions of work rate (W) and fitted with a double linear function.
34
The respiratory compensation point (RCP) was compared and correlated to the breakpoints
35
(BPs) (as %VO2peak) in muscle activation and oxygenation. The BP in total[Hb+Mb]
36
(83.2±3.0%VO2peak) preceded (P
Page 1 of 28
1
THE INTERRELATIONSHIP BETWEEN MUSCLE OXYGENATION, MUSCLE
2
ACTIVATION AND PULMONARY VO2 TO INCREMENTAL RAMP EXERCISE:
3
INFLUENCE OF AEROBIC FITNESS
4
Jan Boone1,2, Thomas J. Barstow3, Bert Celie1, Fabrice Prieur4, Jan Bourgois1,2
5
AFFILIATIONS
6
1
Department of Movement and Sport Sciences, Ghent University, Ghent, Belgium
7
2
Center of Sports Medicine, Ghent University Hospital, Ghent, Belgium
8
3
Kansas State University, Kansas, USA
9
4
Laboratoire CIAMS, Equipe MHAPS, Université Paris Sud-Université d’Orléans, Orléans,
10
France
11 12
CORRESPONDING AUTHOR:
13
Jan Boone
14
Watersportlaan 2
15
9000 Ghent
16
Belgium
17
Tel: +32 9 332 37 43
18
Fax: +32 9 264 64 84
19
[email protected]
20
21
22
23
1
Appl. Physiol. Nutr. Metab. Downloaded from www.nrcresearchpress.com by University of Otago on 11/04/15 For personal use only. This Just-IN manuscript is the accepted manuscript prior to copy editing and page composition. It may differ from the final official version of record.
Page 2 of 28
24
ABSTRACT
25
We investigated whether muscle and ventilatory responses to incremental ramp exercise
26
would be influenced by aerobic fitness status by means of a cross-sectional study with a large
27
subject population. Sixty-four male students (age: 21.2±3.2years) with a heterogeneous
28
VO2peak (51.9±6.3ml.min-1.kg-1, range 39.7-66.2ml.min-1.kg-1) performed an incremental
29
ramp cycle test (20-35Watt.min-1) to exhaustion. Breath-by-breath gas exchange was
30
recorded, and
31
electromyography (sEMG) and near-infrared spectroscopy (NIRS), respectively. The
32
integrated EMG (iEMG), Mean Power Frequency (MPF), deoxy[Hb+Mb] and total[Hb+Mb]
33
responses were set out as functions of work rate (W) and fitted with a double linear function.
34
The respiratory compensation point (RCP) was compared and correlated to the breakpoints
35
(BPs) (as %VO2peak) in muscle activation and oxygenation. The BP in total[Hb+Mb]
36
(83.2±3.0%VO2peak) preceded (P
