| Title |
Relationship between shock attenuation and stride length during running at different velocities
|
|---|---|
| Published in |
European Journal of Applied Physiology, June 2002
|
| DOI | 10.1007/s00421-002-0646-9 |
| Pubmed ID | |
| Authors |
John A. Mercer, Jason Vance, Alan Hreljac, Joseph Hamill |
| Abstract |
The purpose of the study was to investigate the characteristics of shock attenuation during high-speed running. Maximal running speed was identified for each subject [n = 8 males, 25 (SD 4.6) years; 80 (8.9) kg; 1.79 (0.06) m] as the highest speed that could be sustained for about 20 s on a treadmill. During testing, light-weight accelerometers were securely mounted to the surface of the distal antero-medial aspect of the leg and frontal aspect of the forehead. Subjects completed running conditions of 50, 60, 70, 80, 90, and 100% of their maximal speeds with each condition lasting about 20 s. Stride length, stride frequency, leg and head peak impact acceleration were recorded from the acceleration profiles. Shock attenuation was analyzed by extracting specific sections of the acceleration profiles and calculating the ratio of head to leg power spectral densities across the 10-20 Hz frequency range. Both stride length and stride frequency increased across speeds (P < 0.05) and were correlated with running speed (stride length r = 0.92, stride frequency r = 0.89). Shock attenuation increased about 20% per m x s(-1) across speeds (P< 0.05), which was similar to the 17% increase in stride length per m x s(-1). Additionally, shock attenuation was correlated with stride length (r = 0.71) but only moderately correlated with stride frequency (r = 0.40) across speeds. It was concluded that shock attenuation increased linearly with running speed and running kinematic changes were characterized primarily by stride length changes. Furthermore, the change in shock attenuation was due to increased leg not head peak impact acceleration across running speeds. |
X Demographics
The data shown below were collected from the profiles of 2 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United Kingdom | 1 | 50% |
| United States | 1 | 50% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 1 | 50% |
| Members of the public | 1 | 50% |
Mendeley readers
The data shown below were compiled from readership statistics for 235 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Germany | 2 | <1% |
| Belgium | 2 | <1% |
| Chile | 1 | <1% |
| Italy | 1 | <1% |
| Australia | 1 | <1% |
| Netherlands | 1 | <1% |
| Slovenia | 1 | <1% |
| South Africa | 1 | <1% |
| Spain | 1 | <1% |
| Other | 1 | <1% |
| Unknown | 223 | 95% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 45 | 19% |
| Student > Ph. D. Student | 43 | 18% |
| Researcher | 31 | 13% |
| Student > Bachelor | 15 | 6% |
| Student > Doctoral Student | 14 | 6% |
| Other | 54 | 23% |
| Unknown | 33 | 14% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 100 | 43% |
| Medicine and Dentistry | 25 | 11% |
| Engineering | 25 | 11% |
| Agricultural and Biological Sciences | 10 | 4% |
| Nursing and Health Professions | 10 | 4% |
| Other | 20 | 9% |
| Unknown | 45 | 19% |
Attention Score in Context
This research output has an Altmetric Attention Score of 7. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 30 July 2019.
All research outputs
#4,836,164
of 25,374,647 outputs
Outputs from European Journal of Applied Physiology
#1,328
of 4,345 outputs
Outputs of similar age
#16,583
of 126,037 outputs
Outputs of similar age from European Journal of Applied Physiology
#3
of 15 outputs
Altmetric has tracked 25,374,647 research outputs across all sources so far. Compared to these this one has done well and is in the 79th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 4,345 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 14.6. This one has gotten more attention than average, scoring higher than 68% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 126,037 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 86% of its contemporaries.
We're also able to compare this research output to 15 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 80% of its contemporaries.