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Effect of voluntary teeth clenching and sitting posture on maximal static force of limb muscles
Umeå universitet, Medicinska fakulteten, Institutionen för odontologi. Rehabilitation Research Chair, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
2019 (Engelska)Ingår i: Journal of Sports Medicine and Physical Fitness, ISSN 0022-4707, E-ISSN 1827-1928, Vol. 59, nr 5, s. 774-778Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

BACKGROUND: People clench their teeth to activate facial, neck and abdominal muscles when they need to generate heavy muscle force against large resistance like lifting heavy objects, in order to gain possible ergogenic advantage. These are termed as remote voluntary contractions. Aim of this study was to evaluate the effect of voluntary teeth clenching on maximal voluntary contraction of extensors and flexors of the knee, shoulder and elbow joints of the dominant side during slouch and unsupported upright sitting.

METHODS: One hundred healthy young male adults (mean age 23.3 years) participated in this study. Maximal voluntary contraction was measured using a hand-held dynamometer.

RESULTS: Jaw clenching caused different ergogenic effect during slouch versus unsupported sitting postures. The data revealed that during unsupported upright sitting, the effect of jaw clenching consistently results in larger maximal voluntary contraction of both extensor and flexor muscles of all the three studied joints. However, during slouch sitting, only the maximal voluntary contraction of extensors of elbow and flexors of knee were larger with clenched teeth position.

CONCLUSIONS: Jaw clenching can affect the maximal voluntary contraction of limb muscles which is sitting posture dependent. Jaw clenching can consistently facilitate certain muscles of the upper and lower limbs to generate greater force production during upright sitting.

Ort, förlag, år, upplaga, sidor
Turin: Edizioni Minerva Medica , 2019. Vol. 59, nr 5, s. 774-778
Nyckelord [en]
Posture, Jaw, Muscles
Nationell ämneskategori
Sjukgymnastik
Identifikatorer
URN: urn:nbn:se:umu:diva-158721DOI: 10.23736/S0022-4707.18.08341-XISI: 000463024800007PubMedID: 29619804OAI: oai:DiVA.org:umu-158721DiVA, id: diva2:1316883
Tillgänglig från: 2019-05-21 Skapad: 2019-05-21 Senast uppdaterad: 2019-05-21Bibliografiskt granskad

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Zafar, Hamayun

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