PMID- 26701120
OWN - NLM
STAT- MEDLINE
DCOM- 20161007
LR  - 20161230
IS  - 1715-5320 (Electronic)
IS  - 1715-5312 (Linking)
VI  - 41
IP  - 1
DP  - 2016 Jan
TI  - The interrelationship between muscle oxygenation, muscle activation, and 
      pulmonary oxygen uptake to incremental ramp exercise: influence of aerobic 
      fitness.
PG  - 55-62
LID - 10.1139/apnm-2015-0261 [doi]
AB  - We investigated whether muscle and ventilatory responses to incremental ramp 
      exercise would be influenced by aerobic fitness status by means of a 
      cross-sectional study with a large subject population. Sixty-four male students 
      (age: 21.2 +/- 3.2 years) with a heterogeneous peak oxygen uptake (51.9 +/- 6.3 
      mL.min(-1).kg(-1), range 39.7-66.2 mL.min(-1).kg(-1)) performed an incremental 
      ramp cycle test (20-35 W.min(-1)) to exhaustion. Breath-by-breath gas exchange 
      was recorded, and muscle activation and oxygenation were measured with surface 
      electromyography and near-infrared spectroscopy, respectively. The integrated 
      electromyography (iEMG), mean power frequency (MPF), deoxygenated [hemoglobin and 
      myoglobin] (deoxy[Hb+Mb]), and total[Hb+Mb] responses were set out as functions 
      of work rate and fitted with a double linear function. The respiratory 
      compensation point (RCP) was compared and correlated with the breakpoints (BPs) 
      (as percentage of peak oxygen uptake) in muscle activation and oxygenation. The 
      BP in total[Hb+Mb] (83.2% +/- 3.0% peak oxygen uptake) preceded (P < 0.001) the BP 
      in iEMG (86.7% +/- 4.0% peak oxygen uptake) and MPF (86.3% +/- 4.1% peak oxygen 
      uptake), which in turn preceded (P < 0.01) the BP in deoxy[Hb+Mb] (88.2% +/- 4.5% 
      peak oxygen uptake) and RCP (87.4% +/- 4.5% peak oxygen uptake). Furthermore, the 
      peak oxygen uptake was significantly (P < 0.001) positively correlated to the BPs 
      and RCP, indicating that the BPs in total[Hb+Mb] (r = 0.66; P < 0.001), 
      deoxy[Hb+Mb] (r = 0.76; P < 0.001), iEMG (r = 0.61; P < 0.001), MPF (r = 0.63; P 
      < 0.001), and RCP (r = 0.75; P < 0.001) occurred at a higher percentage of peak 
      oxygen uptake in subjects with a higher peak oxygen uptake. In this study a close 
      relationship between muscle oxygenation, activation, and pulmonary oxygen uptake 
      was found, occurring in a cascade of events. In subjects with a higher aerobic 
      fitness level this cascade occurred at a higher relative intensity.
FAU - Boone, Jan
AU  - Boone J
AD  - a Department of Movement and Sport Sciences, Ghent University, Ghent, Belgium.
AD  - b Center of Sports Medicine, Ghent University Hospital, Ghent, Belgium.
FAU - Barstow, Thomas J
AU  - Barstow TJ
AD  - c Department of Kinesiology, Kansas State University, Manhattan, KS 66506, USA.
FAU - Celie, Bert
AU  - Celie B
AD  - a Department of Movement and Sport Sciences, Ghent University, Ghent, Belgium.
FAU - Prieur, Fabrice
AU  - Prieur F
AD  - d Laboratoire CIAMS, Equipe MHAPS, Universite Paris Sud-Universite d'Orleans, 
      Orleans, France.
FAU - Bourgois, Jan
AU  - Bourgois J
AD  - a Department of Movement and Sport Sciences, Ghent University, Ghent, Belgium.
AD  - b Center of Sports Medicine, Ghent University Hospital, Ghent, Belgium.
LA  - eng
PT  - Journal Article
DEP - 20151006
PL  - Canada
TA  - Appl Physiol Nutr Metab
JT  - Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition 
      et metabolisme
JID - 101264333
RN  - 0 (Hemoglobins)
RN  - 0 (Myoglobin)
RN  - S88TT14065 (Oxygen)
SB  - IM
MH  - Adolescent
MH  - Body Mass Index
MH  - Cross-Sectional Studies
MH  - Electromyography
MH  - Exercise/*physiology
MH  - Hemoglobins/metabolism
MH  - Humans
MH  - Male
MH  - Muscle, Skeletal/*metabolism
MH  - Myoglobin/metabolism
MH  - Oxygen/*metabolism
MH  - *Oxygen Consumption
MH  - *Physical Fitness
MH  - Spectroscopy, Near-Infrared
MH  - Young Adult
OTO - NOTNLM
OT  - V̇O2 de crete
OT  - V̇O2 pulmonaire
OT  - V̇O2peak
OT  - activation musculaire
OT  - critical power
OT  - muscle activation
OT  - muscle oxygenation
OT  - oxygenation musculaire
OT  - point de compensation respiratoire
OT  - puissance critique
OT  - pulmonary V̇O2
OT  - respiratory compensation point
EDAT- 2015/12/25 06:00
MHDA- 2016/10/08 06:00
CRDT- 2015/12/25 06:00
PHST- 2015/12/25 06:00 [entrez]
PHST- 2015/12/25 06:00 [pubmed]
PHST- 2016/10/08 06:00 [medline]
AID - 10.1139/apnm-2015-0261 [doi]
PST - ppublish
SO  - Appl Physiol Nutr Metab. 2016 Jan;41(1):55-62. doi: 10.1139/apnm-2015-0261. Epub 
      2015 Oct 6.