Analysis of the velocity curve in sprint running

Volkov, N. I.; Lapin, V I

doi:10.1249/00005768-197901140-00004

Cited by 60 publications

(65 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Linear regressions between measured and modelled speed values (Fig.·3) were close to the identity line for all 12 subjects (r 2 >0.98; P<0.01), showing the high accuracy of this kind of speed modelling during sprint running (Chelly and Denis, 2001;Henry, 1954;Volkov and Lapin, 1979). Even so, it should be noted that: (i) at the start of the run the centre of mass is behind the start line and (ii) whereas the centre of mass rises at the very onset of the run, the radar device does not; as a consequence, (iii) the initial speed data are slightly biased.…”

Section: Critique Of Methodssupporting

confidence: 53%

“…The two sets of data were essentially identical: t radar = 1.01t cells -0.06; r 2 = 0.99; N=120; P<0.01·, (9) thus confirming a previous validation carried out by Chelly and Denis (2001) on moving objects. The speed-time curves were then fitted by an exponential function (Chelly and Denis, 2001;Henry, 1954;Volkov and Lapin, 1979):…”

Section: Methods and Calculationsmentioning

confidence: 99%

See 1 more Smart Citation

Sprint running: a new energetic approach

Prampero

Fusi

Sepulcri

et al. 2005

Journal of Experimental Biology

321

350

View full text Add to dashboard Cite

show abstract

Section: Critique Of Methodssupporting

confidence: 53%

Section: Methods and Calculationsmentioning

confidence: 99%

Sprint running: a new energetic approach

Prampero

Fusi

Sepulcri

et al. 2005

Journal of Experimental Biology

321

350

View full text Add to dashboard Cite

show abstract

“…We were assured from previous reports that these burst speeds have a well-defined and measurable upper limit (41,50). Although this strategy did not allow us to quantify the metabolic energy released during high-speed running directly, our results indicate that this mechanical limit has a direct influence on performance capabilities throughout the relatively broad range of durations investigated.…”

Section: A Common Basis For High-speed Running Performancementioning

confidence: 77%

Energetics of high-speed running: integrating classical theory and contemporary observations

Weyand¹,

Bundle²

2005

American Journal of Physiology-Regulatory, Integrative and Comp

View full text Add to dashboard Cite

We hypothesized that the anaerobic power and aerobic power outputs during all-out runs of any common duration between 10 and 150 s would be proportional to the maximum anaerobic (Ė an-max) and aerobic powers (Ė aer-max) available to the individual runner. Seventeen runners who differed in Ė an-max and Ė aer-max (5 sprinters, 5 middle-distance runners, and 7 long distance runners) were tested during treadmill running on a 4.6°incline. Ė an-max was estimated from the fastest treadmill speed subjects could attain for eight steps. Ė aer-max was determined from a progressive, discontinuous, treadmill test to failure. Oxygen deficits and rates of uptake were measured to assess the respective anaerobic and aerobic power outputs during 11-16 all-out treadmill runs that elicited failure between 10 and 220 s. We found that, during all-out runs of any common duration, the relative anaerobic and aerobic powers utilized were largely the same for sprint, middle-distance, and long-distance subjects. The similar fractional utilization of the Ė an-max and Ė aer-max available during high-speed running 1) provides empirical values that modify and advance classic theory, 2) allows rates of anaerobic and aerobic energy release to be quantified from individual maxima and run durations, and 3) explains why the high-speed running performances of different event specialists can be accurately predicted (R 2 ϭ 0.97; n ϭ 254) from two direct measurements and the same exponential time constant. anaerobic power; aerobic power; locomotion; metabolism; skeletal muscle A. V. HILL (23,24) provided the original physiological explanation for the characteristic relationship between performance and event duration. Using then record performances from competitive foot racing and swimming, he observed that, as the duration of an all-out effort increases from a few seconds to a few minutes, the speed that can be maintained decreases markedly; however, with increases from a few minutes to a few hours, speed decreases relatively little. Hill attributed the negative exponential relationship between performance and duration to the different sources of metabolic energy in the body that fuel short and long efforts.Although many theoretical analyses in Hill's tradition have since come forth, his original conception of the temporal relationships between sources of metabolic energy and event duration remains largely intact. The steep portion of the speedduration curve that characterizes shorter efforts is attributed to rapid decrements in rates of anaerobic energy release with increments in event duration (31, 32), whereas the relatively flat portion of the curve that characterizes longer efforts is attributed to the relatively constant release of aerobic energy beyond an initial activation period. From a qualitative standpoint, post-Hill models (10, 17-19, 29, 35, 37, 38, 42-44, 51) have been in good agreement with available performance data.Although Hill's general explanations continue to be widely accepted, experimental validation of the ideas he formulat...

show abstract

“…Of particular interest in this respect is the behaviour of the ankle plantarflexors, which undergo significant periods of stretch-shortening during stance (Hennessy and Kilty, 2001;Ishikawa and Komi, 2007;Komi, 1984;Komi, 2000;Kubo et al, 2000;. Greater rates of shortening of the plantarflexors because of reduced ground contact times decrease the power output of these muscles (Cavagna et al, 1971;Miller et al, 2011;Volkov and Lapin, 1979), and may limit their ability to generate the required thrust during terminal stance.…”

Section: Introductionmentioning

confidence: 99%