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Slagens påverkan på accelerationer hos huvudet vid lågintensiv sparring hos tävlande ungdomsboxare
Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
2020 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Head impact accelerations during low intensity sparring among competitive teen boxers (English)
Abstract [sv]

SyfteSyftet med studien är att undersöka translationella accelerationer och rotationsaccelerationer hos huvudet vid lätt sparring hos manliga ungdomsboxare samt hur dessa påverkas av slagens acceleration, hastighet, slagteknik, träffområde och blockerande guard.MetodUrvalet baserades på fyra manliga ungdomsboxare tillhörande viktklass -60 kg och -77 kg. Tandskyddssensorer (Hybrid Mouthguard, Prevent Biometrics, USA) och handledsaccelerometrar (Corner Wearables Ltd. U.K.) användes för att mäta accelerationer i huvudet respektive slaghastighet och slagacceleration. Testupplägget bestod av 15 minuter individuell uppvärmning och två ronder a’ 3 minuter per rond på 50 % intensitetsnivå. Pearsons korrelationstest har använts för att undersöka samband och independent-samples t-test har använts för att mäta skillnader.ResultatEtt starkt positivt samband uppmättes mellan translationell acceleration och rotationsacceleration (r = 0,75; p < 0,001) hos huvudet. Inget signifikant samband upptäcktes mellan träff med/utan blockerande guard gällande translationella accelerationer (t = -0,09; p = 0,93) eller rotationsaccelerationer (t = -0,80; p = 0,43) hos huvudet.SlutsatserInget signifikant samband upptäcktes mellan uppmätt slaghastighet och translationella accelerationer hos huvudet eller mellan slaghastighet och rotationsaccelerationer hos huvudet. Ett starkt signifikant samband mellan translationella accelerationer och rotationsaccelerationer hos huvudet. Kollisionerna kännetecknades av de kinematiska egenskaperna som indikerar potentiella skaderisker. Det krävs mätningar i större omfattning för att undersöka de potentiella effekterna av upprepade subkonkusiva slag, då samtliga kollisioner låg under de tidigare uppsatta gränsvärderna för milda hjärnskador.

Abstract [en]

PurposeThe purpose of this study was to examine the translational and rotational accelerations from head impacts during low intensity sparring bouts among competitive teen boxers and how they are affected by punch velocity, acceleration, punch type, impact locations and a defending guard.MethodsFour male competitive teen boxers in the -60 kg and -77 kg weight classes participated in the study. Mouthguard accelerometers (Hybrid Mouthguard, Prevent Biometrics, USA) and wrist accelerometers (Corner Wearables Ltd. U.K.) were equipped to measure the accelerations to the head as well as the punch velocity and punch accelerations. The test battery included 15 minutes of individually chosen warm-ups and two sparring rounds at three minutes each at an intensity of 50 %. Pearson’s correlation test was used to examine the relationships between variables and independent-samples t-test was used to compare means.ResultsA strong correlation was found between translational acceleration and rotational acceleration (r = 0,750) (p < 0,001). No significant relationship was found between the translational and rotational accelerations of a clean punch to the head and a punch to the guard (t = -0,09, p = 0,93 (t = -0,80, p = 0,43).ConclusionsNo significant relationship between punch velocity and translational accelerations or between punch velocity and rotational accelerations of punches to the head. This result emphasizes the need of defensive movements to further avoid the risks of punches to the head. There was a strong correlation between translational accelerations and rotational acceleration. The kinematic properties of the head impacts could indicate potential injuries to the head during sparring even at lower intensities. Even though none of the impacts surpassed the 25 % probability threshold for brain injury, more extensive research is needed to evaluate the potential risks of sub concussive impacts.

Place, publisher, year, edition, pages
2020.
Keywords [en]
Boxing, sparring, head injuries, guard
Keywords [sv]
Boxning, skaderisker, sparring, guard
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:du-36498OAI: oai:DiVA.org:du-36498DiVA, id: diva2:1546782
Available from: 2021-04-23 Created: 2021-04-23 Last updated: 2025-10-09

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Citation style
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