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Effect of progressive muscular relaxation exercises versus transcutaneous electrical nerve stimulation on tension headache: a comparative study
Kumar S, Raje A
Hong Kong Physiotherapy Journal 2014 Dec;32(2):86-91
clinical trial
5/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: Yes; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

Tension-type headache (TTH) is most frequent among all types of headaches. According to the International Headache Classification Subcommittee of the International Headache Society (2004), TTH occurs in 30 to 78% of the population. Progressive muscular relaxation exercises have been shown to reduce TTH, and home-based relaxation programmes can result in significant improvement in headaches. Transcutaneous electrical nerve stimulation (TENS) is a method of electrical stimulation that primarily aims to provide a degree of symptomatic pain relief by exciting sensory nerves and stimulating either the pain gate mechanisms or the opioid systems. The objective of this study was to compare between the effects of progressive muscular relaxation exercises and TENS on pain intensity and stress in people with TTH. Thirty patients with TTH were allocated to either group A or group B. Group A practised progressive muscular relaxation exercise, whereas group B received TENS. In the latter group, TENS electrodes were placed bilaterally either on the head at the site of pain or on the occiput. The treatment was carried out for 15 minutes a day, for 7 days. Patients were assessed for pain intensity (visual analogue scale) and level of stress (Lakaev Academic Stress Response Scale) before and after the intervention period. The results showed that progressive muscular relaxation exercises were effective in reducing pain as well as stress (p < 0.001). TENS, by contrast, reduced stress significantly (p < 0.001), but not pain (p = 0.233). Between-group analysis revealed that there was no statistically significant difference in reduction of pain between the two groups (p = 0.595), but the amount of stress reduction in group A (p = 0.002) was significantly more than that in group B. In conclusion, progressive muscular relaxation exercises were more effective in reducing stress level than TENS in patients with TTH. The effect on pain reduction was similar between the two treatment methods.

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