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Investigating Force-Velocity and Acc...

Stockdale, Robert Alexander,

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Investigating Force-Velocity and Acceleration-Speed Profiling in Elite Football /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Investigating Force-Velocity and Acceleration-Speed Profiling in Elite Football // Robert Alexander Stockdale.
作者:	Stockdale, Robert Alexander,
面頁冊數:	1 electronic resource (87 pages)
附註:	Source: Masters Abstracts International, Volume: 86-07.
Contained By:	Masters Abstracts International86-07.
標題:	Mechanical properties. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31824953
ISBN:	9798302373373

Investigating Force-Velocity and Acceleration-Speed Profiling in Elite Football /
Stockdale, Robert Alexander,

Investigating Force-Velocity and Acceleration-Speed Profiling in Elite Football /Robert Alexander Stockdale. - 1 electronic resource (87 pages)

Source: Masters Abstracts International, Volume: 86-07.

1.1 ObjectivesForce-velocity profiling is becoming more common in elite football environments, to assess sprint acceleration performance and mitigate hamstring muscle injury (HMI) risk. Accelerationspeed profiling has recently been introduced as an alternative to force-velocity profiling, but there is limited research exploring the interchangeability of the two approaches. It is critical that profiling methods are valid and reliable to assess and monitor elite football players' individual force-velocity or acceleration-speed profiles, to help practitioners orient training and rehabilitation programmes, indicate and mitigate injury risk, and improve sprint acceleration and overall football performance. The aim of the project is to investigate force-velocity and acceleration-speed profiles in elite football, including an examination of the validity and reliability of current profiling devices, to provide insight into elite footballers' sprint mechanical capabilities and anecdotal evidence pertaining to prospective HMI risk within this population.1.2 MethodsTwenty-nine elite youth football players from the academy of an English Premier League team volunteered to participate (mean ± SD: age 18.04 ± 1.35 years). Study 1 consisted of an initial 40-m maximal sprint testing protocol conducted utilising a combination of the MySprint app and force-velocity profile calculation spreadsheet, alongside global positioning system (GPS) monitoring. This was followed several months later by a 30-m maximal sprint testing protocol, simultaneously measured using the radar device, MySprint app, and GPS. The radar device (Stalker ATS Pro II; Applied Concepts, Plano, TX, USA) measured instantaneous velocity at a sampling rate of 46.875 Hz and was placed on a tripod 10-m behind the athletes. An iPhone XR (Apple Inc., Cupertino, CA, USA) recorded maximal sprints using the built-in standard HD video function (1080p at 60 frames per second), with videos subsequently imported into the MySprint app (Pedro Jiménez-Reyes., 2016, version 2.0.1). Testing protocols were conducted at the start of team training sessions, both corresponding to 4-days prior to match-day (MD4). Study 2 assessed distance-induced variation in force-velocity profiles derived from GPS data of the 30 and 40-m maximal sprint tests. Study 3 comprised of deriving accelerationspeed profiles in-situ from the GPS data collected during the remainder of the training session after the 30-m maximal sprint testing protocol, and from the competitive game played the following weekend. The training session used for GPS data collection consisted of a mediumsided game lasting 45-minutes (8 vs. 8 + 2 GKs). Study 4 involved post-analysis of acceleration-speed profiles and anecdotal evidence pertaining to prospective HMI risk using quadrant charts. The maximal sprint testing, training session, and competitive game were performed on natural grass open-field and were recorded for each athlete utilising 10-Hz GPS units (APEX Pro, STATSports, Northern Ireland).1.3 Results1.3.1 Study 1 - Validity and reliability of force-velocity profiling techniquesThere was no significant difference in F0 or Vmaxwhen the MySprint analysis procedure was repeated by the same tester for the 30-m maximal sprint testing protocol (for F0 or Vmax,p > 0.05, RMSE and CV: 0.19 N/Kg and 2.9%, 0.07 m/s and 0.54%, ICC = 0.832 and ICC = 0.976).

English

ISBN: 9798302373373Subjects--Topical Terms:

3549505
Mechanical properties.

Investigating Force-Velocity and Acceleration-Speed Profiling in Elite Football /
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