Vibration Therapy in Management of Delayed Onset Muscle Soreness (DOMS).

Svært interessant studie på hvordan vibrasjon (percussor) hjelper mot smerte og stølhet. Den snakker mest om whole-body-vibration, som f.eks. på en Vibroplate. Men de fleste fysiologiske effektene gjelder også for lokal vibrasjon som gis av en Percussor. 

http://www.ncbi.nlm.nih.gov/pubmed/25121012

Hele studien her: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4127040/

Abstract

Both athletic and nonathletic population when subjected to any unaccustomed or unfamiliar exercise will experience pain 24-72 hours postexercise. This exercise especially eccentric in nature caused primarily by muscle damage is known as delayed-onset muscle soreness (DOMS). This damage is characterized by muscular pain, decreased muscle force production, reduce range of motion and discomfort experienced. DOMS is due to microscopic muscle fiber tears. The presence of DOMS increases risk of injury. A reduced range of motion may lead to the incapability to efficiently absorb the shock that affect physical activity. Alterations to mechanical motion may increase strain placed on soft tissue structures. Reduced force output may signal compensatory recruitment of muscles, thus leading to unaccustomed stress on musculature. Differences in strength ratios may also cause excessive strain on unaccustomed musculature. A range of interventions aimed at decreasing symptoms of DOMS have been proposed. Although voluminous research has been done in this regard, there is little consensus among the practitioners regarding the most effective way of treating DOMS. Mechanical oscillatory motion provided by vibration therapy. Vibration could represent an effective exercise intervention for enhancing neuromuscular performance in athletes. Vibration has shown effectiveness in flexibility and explosive power. Vibration can apply either local area or whole body vibration. Vibration therapy improves muscular strength, power development, kinesthetic awareness, decreased muscle sore, increased range of motion, and increased blood flow under the skin. VT was effective for reduction of DOMS and regaining full ROM. Application of whole body vibration therapy in postexercise demonstrates less pressure pain threshold, muscle soreness along with less reduction maximal isometric and isokinetic voluntary strength and lower creatine kinase levels in the blood.

 

Cutaneous Receptors Responses: The sensation of pressure and touch is masked during vibration [20], and also postvibration [21]. Some cutaneous mechanoreceptor afferents get aroused for many minutes postvibration [21] and this may be the physiological reason for the tingling sensation often experienced postvibration. On the basis of gate control hypothesis [22] we can infer that vibration strongly impacts affrents discharge from fast adapting mechanoreceptors and muscle spindles and hence become an effective pain reliever.

Pain Perception Responses: Vibration can be used as transcutaneous electrical nerve stimulation (TENS) [23] to reduce the perception of pain [7]. Passive vibration has reduced pain in 70% of patients with acute and chronic musculoskeletal pain [24] and passive 80 Hz vibration has been shown to reduce pain caused by muscle pressure [25]. More recent evidence suggests that pain perception in DOMS depends partly on fast myelinated afferent fibres, which are distinct from those that convey most other types of pain [26].

Lundeberg et al., concluded that vibration relieved pain by activating the large diameter fibres while suppressing the transmission activity in small diameter fibres [24,28].

Vibration therapy leads to increase of skin temperature and blood flow [30].

 

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