1. A Randomized Trial on the Effect of Bone Tissue on Vibration-induced Muscle Strength Gain and Vibration-induced Reflex Muscle Activity
- Author
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Kerem Gün, Muharrem Cidem, Suat Hayri Küçük, Demirhan Diracoglu, Murat Özkaya, Aysel Yildiz, Murat Uludag, Safak Sahir Karamehmetoglu, and Ilhan Karacan
- Subjects
medicine.medical_specialty ,electromyography ,Bone mineral density,electromyography,muscle training,sclerostin,tonic vibration reflex ,lcsh:Medicine ,Electromyography ,sclerostin ,Bone tissue ,tonic vibration reflex ,chemistry.chemical_compound ,Health Care Sciences and Services ,Internal medicine ,medicine ,Bone mineral density ,Tonic vibration reflex ,muscle training ,Sağlık Bilimleri ve Hizmetleri ,Semitendinosus muscle ,Femoral neck ,Bone mineral ,medicine.diagnostic_test ,business.industry ,lcsh:R ,General Medicine ,Anatomy ,medicine.anatomical_structure ,chemistry ,Cardiology ,Reflex ,Sclerostin ,Original Article ,business - Abstract
Background: Whole-body vibration (WBV) induces reflex muscle activity and leads to increased muscle strength. However, little is known about the physiological mechanisms underlying the effects of whole-body vibration on muscular performance. Tonic vibration reflex is the most commonly cited mechanism to explain the effects of whole-body vibration on muscular performance, although there is no conclusive evidence that tonic vibration reflex occurs. The bone myoregulation reflex is another neurological mechanism used to explain the effects of vibration on muscular performance. Bone myoregulation reflex is defined as a reflex mechanism in which osteocytes exposed to cyclic mechanical loading induce muscle activity. Aims: The aim of this study was to assess whether bone tissue affected vibration-induced reflex muscle activity and vibration-induced muscle strength gain. Study Design: A prospective, randomised, controlled, double-blind, parallel-group clinical trial. Methods: Thirty-four participants were randomised into two groups. High-magnitude whole-body vibration was applied in the exercise group, whereas low-magnitude whole-body vibration exercises were applied in the control group throughout 20 sessions. Hip bone mineral density, isokinetic muscle strength, and plasma sclerostin levels were measured. The surface electromyography data were processed to obtain the Root Mean Squares, which were normalised by maximal voluntarily contraction. Results: In the exercise group, muscle strength increased in the right and left knee flexors (23.9%, p=0.004 and 27.5%, p
- Published
- 2014