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Bilateral muskelaktivering och effektutveckling: En observation av bilateral rörelse med armergometer
Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
2018 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Bilateral muscle activation and power production (English)
Abstract [sv]

Syfte

Syftet med studien var att observera bilateral effektutveckling, samt muskelaktivering i de

övre extremiteterna. En bilateral övning observerades för att se om skillnader i

muskelaktivering och effektutveckling fanns i dominant respektive icke dominant övre

extremitet, samt diskutera dess implikationer.

Metod

Nio tränade deltagare fick utföra armcykling på en armergometer som modifierats så att

rörelsen blev bilateral. Armcyklingen pågick i cirka åtta minuter med fyra belastningsnivåer

(30W, 60W, 90W, 120W) där 50 RPM eftersträvades. Vid varje belastningsnivå registrerades

effektutveckling och EMG under 30 sekunder. Medelvärdet av effektutvecklingen i dominant

och icke dominant sida jämfördes med ett tvåvägs oberoende ANOVA.

Resultat

Vid effektutvecklingen hos dominant och icke dominant sida av kroppen fanns en statistisk

signifikant skillnad mellan dominant och icke dominant sida F (3, 64) = 4.13, p = .046; med

en medelstor effektstorlek (partial eta squared = .061) p-värdet sattes till .05. Icke dominant

sida utförde mest arbete. Bakre deltoideus aktiverades generellt sett lika mycket i dominant

och icke dominant sida, dock var icke dominant sida mer aktiv. De dominanta

fingerflexorerna hade en större aktivering kontra de icke dominanta.

Slutsatser

Studien fann signifikant skillnad i effektutveckling av dominant och icke dominant sida av de

övre extremiteterna där icke dominant sida gjorde ett större arbete. Muskel EMG visade stora

individuella skillnader hos deltagarna.

Abstract [en]

Objectives

The objective of the study was to observe bilateral power production and muscle activation in

the upper extremities. A bilateral exercise was observed to see if differences in muscle

activation and power production was present in dominant and non-dominant extremities, and

furthermore discuss the implications.

Method

Nine trained participants performed arm cycling on a modified arm ergometer so the

movement became bilateral. During eight minutes of cycling with four levels of intensity

(30W, 60W, 90W, 120W) where 50 RPM was strived for. 30 seconds of power production

and EMG data were recorded for each intensity. A two-way independent ANOVA was

conducted on the mean values of power production of the dominant and the non-dominant

side.

Results

There was a significant difference in the dominant and non-dominant side F (3, 64) = 4.13, p

= .046; with a medium effect size (partial eta squared = .0.61) p value set to .05. The nondominant

side did the majority of the work. The posterior deltoids had a similar muscle

activation, however the non-dominant activated more. The dominant finger flexors activated

more than the non-dominant with large individual differences within the sample group.

Conclusions

This study found significant differences in power production in the dominant and the nondominant

side of the upper extremities. The non-dominant side had a greater power

production. The EMG-data showed great individual differences within muscle activation.

Place, publisher, year, edition, pages
2018.
Keywords [sv]
bilateral, ergometer, EMG, effekt, effektutveckling, paracykling, bilateral, ergometer, EMG, power, power production, paracycling
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:du-28152OAI: oai:DiVA.org:du-28152DiVA, id: diva2:1232419
Available from: 2018-07-11 Created: 2018-07-11

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