Influence of thigh activation on the $$\dot{V}$$ V ˙ O2 slow component in boys and men | Zendy

Brynmor C. Breese | Zendy; Alan R. Barker | Zendy; Neil Armstrong | Zendy; Jonathan Fulford | Zendy; Craig A. Williams | Zendy

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Influence of thigh activation on the $$\dot{V}$$ V ˙ O2 slow component in boys and men

Author(s) -

Brynmor C. Breese,

Alan R. Barker,

Neil Armstrong,

Jonathan Fulford,

Craig A. Williams

Publication year - 2014

Publication title -

european journal of applied physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.05

H-Index - 133

eISSN - 1439-6327

pISSN - 1439-6319

DOI - 10.1007/s00421-014-2941-7

Subject(s) - human physiology , component (thermodynamics) , sports medicine , medicine , physical therapy , physics , thermodynamics

During constant work rate exercise above the lactate threshold (LT), the initial rapid phase of pulmonary oxygen uptake (VO₂) kinetics is supplemented by an additional VO₂ slow component (VO₂Sc) which reduces the efficiency of muscular work. The VO₂Sc amplitude has been shown to increase with maturation but the mechanisms are poorly understood. We utilized the transverse relaxation time (T₂) of muscle protons from magnetic resonance imaging (MRI) to test the hypothesis that a lower VO₂ slow component (VO₂Sc) amplitude in children would be associated with a reduced muscle recruitment compared to adults.

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