Changes in Running Economy During a 5-km Run in Trained Men and Women Runners

Thomas, David Q.; Fernhall, Bo; Granat, H.

doi:10.1519/00124278-199905000-00011

Cited by 17 publications

(22 citation statements)

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“…Additionally, past research has also demonstrated that walking with BFR increases submaximal VO 2 (Abe et al ., ; Sakamaki‐Sunaga et al ., ), thus suggesting that walking economy is acutely disturbed in response to this type of exercise. Walking economy is defined as the minute steady‐state VO 2 (ml kg −1 min −1 ) at a selected submaximal walking speed and represents the aerobic demand of walking at a given speed (Thomas et al ., ). Importantly, the relationship between the metabolic cost of walking can be described using a quadratic function; as a consequence, walking economy shows a minimum at an intermediate walking speed, often called the ‘optimal walking speed’ (Saibene & Minetti, ).…”

Section: Introductionmentioning

confidence: 97%

Metabolic cost of locomotion during treadmill walking with blood flow restriction

Mendonça

Vaz

Teixeira

et al. 2013

Clin Physio Funct Imaging

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We explored whether interval walking with blood flow restriction (BFR) increases net metabolic cost of locomotion in healthy young men at their optimal walking speed. We also determined whether decreased walking economy resulting from BFR might be accompanied by an increase in ventilation relative to VO2 and VCO2 . Finally, we examined possible relationships between the changes in ratings of perceived exertion (RPE) and those obtained in minute ventilation (VE ) during walking with BFR. Eighteen healthy men (age: 22·5 ± 3·4 years) performed graded treadmill exercise to assess VO2max . In a randomized fashion, participants also performed five bouts of 3-min treadmill exercise with and without BFR at their optimal walking speed. Walking with BFR elicited an overall increase in net VO2 (10·4%) compared with that seen in the non-BFR condition (P<0·05). The participants also demonstrated greater VE and VE /VO2 values while walking with BFR (P<0·05). Conversely, VE /VCO2 was similar between conditions at each walking bout. We found no significant correlation between the changes in VE and RPE induced by walking with BFR (r = 0·38, P>0·05). Our results indicate that (i) BFR decreases net walking economy in healthy young men, even at their optimal walking speed; (ii) heightened ventilatory drive may explain a small proportion of BFR effects on walking economy; and (iii) the ventilatory responses to BFR walking may be largely independent of changes in perceived exertion and are likely matched to the flux of CO2 between muscles and respiratory centres.

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Section: Introductionmentioning

confidence: 97%

Metabolic cost of locomotion during treadmill walking with blood flow restriction

Mendonça

Vaz

Teixeira

et al. 2013

Clin Physio Funct Imaging

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“…6 Taking body mass into consideration, runners with good running economy use less energy and therefore less oxygen than runners with poor running economy at the same velocity. 7 There is a strong association between running economy and distance running performance. [8][9][10] The CKMM gene has been mapped to the q13.2-q13.3 region of chromosome 19.…”

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confidence: 99%

Muscle-specific creatine kinase gene polymorphism and running economy responses to an 18-week 5000-m training programme

Zhou

Hu²,

Liu³

et al. 2006

Br J Sports Med

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Objective: To investigate the association between muscle-specific creatine kinase (CKMM) gene polymorphism and the effects of endurance training on running economy. Methods: 102 biologically unrelated male volunteers from northern China performed a 5000-m running programme, with an intensity of 95-105% ventilatory threshold. The protocol was undertaken three times per week and lasted for 18 weeks. Running economy indexes were determined by making the participants run on a treadmill before and after the protocol, and the A/G polymorphism in the 39 untranslated region of CKMM was detected by polymerase chain reaction-restricted fragment length polymorphism (NcoI restriction enzyme). Results: Three expected genotypes for CKMM-NcoI (AA, AG and GG) were observed in the participants. After training, all running economy indexes declined markedly. Change in steady-state consumption of oxygen, change in steady-state consumption of oxygen by mean body weight, change in steady-state consumption of oxygen by mean lean body weight and change in ventilatory volume in AG groups were larger than those in AA and GG groups. Conclusions: The findings indicate that the CKMM gene polymorphism may contribute to individual running economy responses to endurance training.

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“…An other study found for 60min treadmill running near 80% of VO 2max a shift of about 3% in oxygen uptake [15]. Changes in running economy have been also observed during a 5km run at a constant pace eliciting about 80 − 85% of VO 2max with an average increase in oxygen uptake of 3.3% for men and 2.0% for women [16]. The reason for the increase in oxygen uptake and reduction in running economy is unknown.…”

Section: Introductionmentioning

confidence: 95%

A minimal power model for human running performance

2018

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Models for human running performances of various complexities and underlying principles have been proposed, often combining data from world record performances and bio-energetic facts of human physiology. The purpose of this work is to develop a novel, minimal and universal model for human running performance that employs a relative metabolic power scale. The main component is a self-consistency relation for the time dependent maximal power output. The analytic approach presented here is the first to derive the observed logarithmic scaling between world (and other) record running speeds and times from basic principles of metabolic power supply. Our hypothesis is that various female and male record performances (world, national) and also personal best performances of individual runners for distances from 800m to the marathon are excellently described by this model. Indeed, we confirm this hypothesis with mean errors of (often much) less than 1%. The model defines endurance in a way that demonstrates symmetry between long and short racing events that are separated by a characteristic time scale comparable to the time over which a runner can sustain maximal oxygen uptake. As an application of our model, we derive personalized characteristic race speeds for different durations and distances.

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Changes in Running Economy During a 5-km Run in Trained Men and Women Runners

Cited by 17 publications

References 0 publications

Metabolic cost of locomotion during treadmill walking with blood flow restriction

Metabolic cost of locomotion during treadmill walking with blood flow restriction

Muscle-specific creatine kinase gene polymorphism and running economy responses to an 18-week 5000-m training programme

A minimal power model for human running performance

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