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Comparison of ground reaction force and knee angle between parkour precision landing and traditional landing
Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
2017 (Engelska)Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
Abstract [en]

Background. Parkour is a sport which has developed its own landing technique, precision landing (PL), which has shown to reduce vertical ground reaction forces (vGRF) in comparison to a more traditional landing (TL). However previous studies lacks control for intra group knee flexion between the TL and PL techniques. Aim. The aim of this study was to analyse the biomechanical differences between a parkour precision landing with a traditional landing in four knee flexion groups (Stiff landing (SL), 25-50o, 50-75o and 75-100o), comparing vGRF, time to peak force and average rate of force development (avgRFD) between both landing techniques within each group as well as between the groups. Method. 42 participants were recruited to participate in a single session of a randomized, experimental study. Participants were randomly placed into one of four groups and performed a practice session of the two different landing techniques at the knee flexion angle given. All participants performed 5 approved landings with a TL technique and thereafter 5 approved landing using PL. Results. A significant increase of vGRF was found with TL compared to PL within all groups (p ≤ 0.05). Reduced time to peak force and increased avgRFD was found in TL compared to PL across all groups (p = 0.01) with the exception of 25-50o (p = 0.27 for time to peak force and p = 0.73 for avgRFD). Conclusion. The results of current study shows that PL reduces vGRF, time to peak force and avgRFD compared to TL in recreationally trained individuals. The results varied when compared between knee flexion groups, however results shows that 50-75o seems to be the more optimal range of knee flexion in terms of reducing ground reaction forces.

Ort, förlag, år, upplaga, sidor
2017.
Nationell ämneskategori
Fysiologi
Identifikatorer
URN: urn:nbn:se:hh:diva-35256OAI: oai:DiVA.org:hh-35256DiVA, id: diva2:1152434
Utbildningsprogram
Biomedicin - inriktning fysisk träning
Handledare
Examinatorer
Tillgänglig från: 2017-10-31 Skapad: 2017-10-24 Senast uppdaterad: 2018-01-13Bibliografiskt granskad

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