Context: There are numerous studies on the benefits of dry needling (DN) for pain relief. No studies exist examining the effects of DN on hamstring flexibility. Objective: To determine the immediate effects of DN on hamstring flexibility in healthy subjects with shortened hamstrings. Design: A single-blinded, pretest–posttest clinical pilot study. Setting: A university physiotherapy clinic. Subjects: A total of 15 healthy subjects (female = 11; age = 23.26 [4.3] y) with shortened hamstrings participated in this study. Intervention: Subjects received a single session of DN. Three locations on the hamstring muscle group were needled, each for 1 minute. Main Outcome Measures: The active knee extension test, muscle compliance, passive peak torque, and stretch tolerance were measured at baseline, immediately, and 15 minutes after DN. Results: There were statistically significant improvements in all outcome measures immediately after DN and at the 15-minute follow-up. The effect sizes for all outcome measures were large (Cohen’s d ≥ 0.8). No serious adverse events were observed with DN. Conclusions: This is the first study that demonstrates the beneficial effects of DN on hamstring flexibility, muscle compliance, and stretch tolerance without added stretching. The beneficial effects of DN should encourage clinicians to use DN as a novel strategy for increasing muscle flexibility.
Noureddin Nakhostin Ansari, Parisa Alaei, Soofia Naghdi, Zahra Fakhari, Shiva Komesh and Jan Dommerholt
Noureddin Nakhostin Ansari, Soofia Naghdi, Hadi Karimi-Zarchi, Zahra Fakhari and Scott Hasson
Whole-body vibration (WBV) is a type of weight-bearing exercise used in the field of sport and rehabilitation. There is no study on the effects of WBV on muscle recovery after a fatiguing activity.
To determine the effects of a single WBV session on lower-extremity fatigue.
Randomized controlled pilot study.
University Physiotherapy Clinic.
A total of 13 healthy young men volunteered to participate in this study. Subjects were randomly assigned into the WBV group (n = 7, mean age: 21 y) or control group (CG; n = 6, mean age: 20 y).
Subjects in the WBV group participated in a single-session WBV (30 Hz, amplitude 4 mm, 2 min) after lower-extremity fatigue.
Main Outcome Measures:
Peak force of quadriceps muscle, single leg hop test, and Y-test were measured before inducing muscle fatigue (T0), immediately after completing the fatigue protocol (T1), after WBV (T2), and 15 min following the application of WBV (T3). The same method was applied in the CG while the WBV machine was turned off.
Repeated-measure ANOVA revealed no significant differences between groups in any of the outcomes.
The findings indicated that WBV was not effective in the recovery of lower-extremity fatigue in healthy young men.