Background: the sector of electro therapy grows rapidly recently; high tone power therapy (HTT) may be a new modality in this field with a primary aim directing towards its effect on the cellular metabolism. This work aimed to check the effect of high tone power therapy on functional ability and pain in diabetic patients with lumbar radiculopathy. Methodology: sixty diabetic patients type ΙΙ were randomly classified into two groups equally in number (control & study groups): group B (control) received selected designed program of therapy for 12 sessions every other day for four weeks, each session for 45 minutes while group A (study) received high tone power therapy plus the same program of physiotherapy as control group for 12 sessions every other day, for four weeks, each session lasted for 1 hour and 45 minutes, one hour for HTT and 45 min for selected designed physiotherapy program. Patients were assessed neurophysiologically by: (H-Reflex latency and amplitude study) by electromyography device,Oswestry Disability Index (ODI) was used to assess functional outcome and Visual analogue scale (VAS) for pain intensity. Results: This study revealed that neurophysiological measures were improved significantly in study group in relation to control group (P= 0.005, 0.036). Oswestry Disability Index (Functional outcome) was improved significantly in both groups with higher improvement results for study group (P= 0.000) and pa(P= 0.000) in was improved in both groups with significant improvement in study group when compared to control group. Conclusion: HTT can be included as a valuable, effective and non-invasive method for enhancing neurophysiological measures, functional abilities and pain of diabetic patients with lumbar radiculopathy.

High tone power therapy; Neurophysiological measures: H-Reflex latency and amplitude; Functional abilities; Diabetic patients with lumbar radiculopathy.