Oxygen uptake kinetics: an underappreciated determinant of exercise performance.

@article{Jones2009OxygenUK,
  title={Oxygen uptake kinetics: an underappreciated determinant of exercise performance.},
  author={Andrew M. Jones and Mark Burnley},
  journal={International journal of sports physiology and performance},
  year={2009},
  volume={4 4},
  pages={
          524-32
        }
}
The rate at which VO(2) adjusts to the new energy demand following the onset of exercise strongly influences the magnitude of the "O(2) deficit" incurred and thus the extent to which muscle and systemic homeostasis is perturbed. Moreover, during continuous high-intensity exercise, there is a progressive loss of muscle contractile efficiency, which is reflected in a "slow component" increase in VO(2). The factors that dictate the characteristics of these fast and slow phases of the dynamic… 

Figures from this paper

Oxygen uptake kinetics.

Greater understanding of VO2 kinetics control and, in particular, its relation to the plasticity of the O2-transport/utilization system is considered important for improving the human condition, not just in athletic populations, but crucially for patients suffering from pathologically slowed VO2Kinetics as well as the burgeoning elderly population.

Oxygen uptake kinetics and energy system’s contribution around maximal lactate steady state swimming intensity

It is suggested that well-trained endurance swimmers with a fast TD and τp values may be able to adjust faster the physiological requirements to minimize the amplitude of the slow component appearance, parameter associated with the fatigue delay and increase in exhaustion time during performance, however, these fast adjustments were not able to control the progressive fatigue occurred slightly above MLSS.

Muscle fiber recruitment and the slow component of O2 uptake: constant work rate vs. all-out sprint exercise.

The considerable reduction in muscle efficiency in the all-out test in the face of a progressively falling integrated EMG indicates that progressive fiber recruitment is not requisite for development of the Vo(2) slow component during voluntary exercise in humans.

Tolerance to high-intensity intermittent running exercise: do oxygen uptake kinetics really matter?

While V�’O2max and vV˙ O2max are likely determinant for HIT tolerance, the importance of V˙O 2 kinetics as assessed in this study appears limited in the present population.

Inspiratory muscle training enhances pulmonary O(2) uptake kinetics and high-intensity exercise tolerance in humans.

Four weeks of IMT, which reduced inspiratory muscle fatigue, resulted in a reduced Vo(2) slow-component amplitude and an improved exercise tolerance during severe- and maximal-intensity exercise, indicating that the enhanced exercise tolerance observed after IMT might be related, at least in part, to improved Vo( 2) dynamics, presumably as a consequence of increased blood flow to the exercising limbs.

The effects of intensity on V̇O2 kinetics during incremental free swimming.

  • K. de JesusA. Sousa R. Fernandes
  • Environmental Science, Biology
    Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme
  • 2015
Oxygen uptake kinetics whilst swimming at different intensities offers relevant information regarding cardiorespiratory and metabolic stress that might be useful for appropriate performance diagnosis and training prescription.

Oxygen uptake kinetics at moderate and extreme swimming intensities

Both intensities were well described by double-exponential fittings, and there were significant differences between them in terms of amplitude and time constant.

Exercise modality effect on oxygen uptake off‐transient kinetics at maximal oxygen uptake intensity

The mechanical differences between exercise modes had a potential effect and contributed to distinct amplitude of the fast component and time constant in the V̇O2 off‐kinetic patterns at 100% of V̧O2max intensity.

Dietary nitrate supplementation enhances muscle contractile efficiency during knee-extensor exercise in humans.

The reduced O(2) cost of exercise following dietary NO(3)(-) supplementation appears to be due to a reduced ATP cost of muscle force production.
...

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