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| Effects of spray and stretch on postneedling soreness and sensitivity after dry needling of a latent myofascial trigger point |
| Martin-Pintado-Zugasti A, Rodriguez-Fernandez AL, Garcia-Muro F, Lopez-Lopez A, Mayoral O, Mesa-Jimenez JA, Fernandez-Carnero J |
| Archives of Physical Medicine and Rehabilitation 2014 Oct;95(10):1925-1932 |
| clinical trial |
| 5/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: Yes; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: No. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed* |
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OBJECTIVE: To investigate (1) the effect of spray and stretch (SS) versus control on reducing post-needling soreness of one latent myofascial trigger point (MTrP) and (2) if higher levels of psychological distress are associated with increased post-needling pain intensity. DESIGN: A 72-hour follow-up, single-blind randomized controlled trial. SETTING: University community. PARTICIPANTS: Healthy volunteers (n = 70: 40 men, 30 women) aged 18 to 36 years (mean +/- SD 21 +/- 4 y) with latent MTrP in one upper trapezius muscle. INTERVENTION: All subjects received a dry needling application over the upper trapezius muscle. Then, participants were randomly divided into two groups: an intervention group, which received SS over the needled trapezius muscle, and a control group that did not receive any intervention. MAIN OUTCOME MEASURES: Visual analog scale (VAS; at post-needling, post-treatment, 6, 12, 24, 48 and 72 hours), pressure pain threshold (PPT; at pre-needling, post-needling, 24 and 48 hours). Psychological distress was evaluated by the Symptom Checklist-90-Revised. RESULTS: Repeated measures analysis of variance (ANOVA) demonstrated a significant interaction between group and time (F[3,204.8] = 3.19, p < 0.05, eta-p2 = 0.04) for changes in post-needling soreness. Between-group differences were only significant immediately after intervention (p = 0.002) and there were no differences found between groups after 6 hours of the intervention (p > 0.05). Repeated measures of covariance (ANCOVA) showed that none of the psychological covariates affected these results. Somatization, anxiety, interpersonal sensitivity and hostility were significantly correlated (p < 0.05) with post-needling pain intensity. Repeated measures ANOVA did not show a significant effect of SS on mechanical hiperalgesia (F[2.6,175] = 1.9, p = 0.131, eta-p2 = 0.02). CONCLUSIONS: The SS had a short-term (less than 6 hours) effect reducing post-needling soreness of a latent MTrP. PPT did not significantly change after SS. Psychological factors are related to post-needling pain.
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