Influence of muscular contraction on vascular conductance during exercise above versus below critical power

Hammer, Shane M.; Hammond, Stephen T.; Parr, Shannon K.; Alexander, Andrew M.; Turpin, Vanessa-Rose G.; White, Zachary; Didier, Kaylin D.; Smith, Joshua R.; Barstow, Thomas J.; Ade, Carl J.

doi:10.1016/j.resp.2021.103718

Cited by 10 publications

(16 citation statements)

References 63 publications

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“…However, during exercise slightly above CF, end-exercise brachial artery blood flow demonstrated a plateau, being no different from the blood flow values obtained during exercise at CF [79]. These findings were subsequently extended to large muscle mass, whole-body exercise by the same authors [80]. Specifically, leg blood flow and limb vascular conductance were determined using Doppler ultrasound and calibrated finger plethysmography during exercise above and below CP [80].…”

Section: -6cwrmentioning

confidence: 76%

“…Following subsequent reperfusion, force was able to recover to a level not significantly different from CF determined under free-flowing conditions [78]. These authors also demonstrated that up to and including CF, end-exercise limb blood flow values were linearly related to the constantforce requirements of each task [79,80]. However, during exercise slightly above CF, end-exercise brachial artery blood flow demonstrated a plateau, being no different from the blood flow values obtained during exercise at CF [79].…”

Section: -6cwrmentioning

confidence: 84%

“…These findings were subsequently extended to large muscle mass, whole-body exercise by the same authors [80]. Specifically, leg blood flow and limb vascular conductance were determined using Doppler ultrasound and calibrated finger plethysmography during exercise above and below CP [80]. Post-exercise increases in limb vascular conductance and leg blood flow post-exercise were observed following supra-CP but not sub-CP exercise [80].…”

Section: -6cwrmentioning

confidence: 92%

“…Specifically, leg blood flow and limb vascular conductance were determined using Doppler ultrasound and calibrated finger plethysmography during exercise above and below CP [80]. Post-exercise increases in limb vascular conductance and leg blood flow post-exercise were observed following supra-CP but not sub-CP exercise [80]. The data of Hammer et al [79,80] are in contrast to observations in the running rat [25] and from upright, incremental, large muscle mass exercise in humans [52,81] showing increases in limb blood flow up to VO 2max .…”

Section: -6cwrmentioning

confidence: 99%

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Interaction of Factors Determining Critical Power

Goulding

Marwood

2023

Sports Med

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The physiological determinants of high-intensity exercise tolerance are important for both elite human performance and morbidity, mortality and disease in clinical settings. The asymptote of the hyperbolic relation between external power and time to task failure, critical power, represents the threshold intensity above which systemic and intramuscular metabolic homeostasis can no longer be maintained. After ~ 60 years of research into the phenomenon of critical power, a clear understanding of its physiological determinants has emerged. The purpose of the present review is to critically examine this contemporary evidence in order to explain the physiological underpinnings of critical power. Evidence demonstrating that alterations in convective and diffusive oxygen delivery can impact upon critical power is first addressed. Subsequently, evidence is considered that shows that rates of muscle oxygen utilisation, inferred via the kinetics of pulmonary oxygen consumption, can influence critical power. The data reveal a clear picture that alterations in the rates of flux along every step of the oxygen transport and utilisation pathways influence critical power. It is also clear that critical power is influenced by motor unit recruitment patterns. On this basis, it is proposed that convective and diffusive oxygen delivery act in concert with muscle oxygen utilisation rates to determine the intracellular metabolic milieu and state of fatigue within the myocytes. This interacts with exercising muscle mass and motor unit recruitment patterns to ultimately determine critical power.

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Section: -6cwrmentioning

confidence: 76%

Section: -6cwrmentioning

confidence: 84%

Section: -6cwrmentioning

confidence: 92%

Section: -6cwrmentioning

confidence: 99%

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Interaction of Factors Determining Critical Power

Goulding

Marwood

2023

Sports Med

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“…It not only needs strong leg strength as the support condition, but also needs strong explosive force to improve the initial speed of the ball. 2 Singh J and others believe that core strength is conducive to providing a solid fulcrum for limb movement and building a complete special sports chain, which plays a vital role in the balance ability of the body. The stronger the core muscle group, the better the explosive power and sensitivity of athletes' lower limbs.…”

Section: Introductionmentioning

confidence: 99%

Influence of Strength Training on the Explosive Power of Lower Limbs of Soccer Players

Zhang

2023

Rev Bras Med Esporte

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Introduction The explosive power of the lower limbs is an indispensable index in soccer. Having a good level of explosive power establishes a solid foundation for the performance and the competitive level of soccer players. Objective Promote the conditions to improve the explosive level of soccer players and improve their performance and competitive level. Methods This paper presents the influence of compound strength training on the explosive power of the lower limbs of soccer athletes. Based on 27 young 9-year-old soccer players from Zai Ming Football Club of a sports college as experimental material, the composite training was carried out. Results The growth rates of these rates in the experimental group were 3.3%, 2.3%, 5.0%, 3.6%, 9.2%, 12.1%, 20.5%, 5.7%, 11.9%, 16.9% and 19.5% respectively, while those in the control group were 1.2%, 0.7%, 4.2%, 3.1%, 6.8%, 7.8%, 5.1%, 4.2%, 4.8%, 12.5% and 19.2% respectively. The growth rate of the experimental group was higher than that of the control group and the blank control group. Conclusion Compared with the control group and the neutral control group, the experimental group with compound training has a better training effect on improving the lower limb explosiveness of youth soccer players. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

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