Study on Immediate Effects of Electrical Stimulation on Pain and Function for Adults with Achilles Tendon Injuries

What this Trial Is About

Researchers are studying patients with Achilles tendinopathy or a history of Achilles tendon rupture to compare the immediate effects of two types of neuromuscular electrical stimulation on pain, function, oxygen use, and tendon movement during a single leg heel rise task. The study also aims to assess Achilles tendon structure and ankle muscle strength in this group. This randomized crossover clinical trial investigates optimal electrical stimulation dosing for rehabilitation in these tendon conditions. Participants will complete two intervention blocks separated by a seven-day break. Block A includes a control without stimulation and electrical stimulation at maximum tolerated intensity causing muscle contraction and discomfort. Block B includes a control with sham stimulation and sensory-level stimulation without visible muscle contraction. Each intervention involves three sets of 10 repetitions of the single leg heel rise task, with assessments immediately after each set. During the trial, researchers will measure pain levels, functional performance, peripheral oxygen extraction, and maximal tendon displacement right after the exercises. Baseline evaluations include Achilles tendon length, thickness, cross-sectional area, neovascularization, elasticity, shear wave velocity, depth, and muscle strength. The study monitors these outcomes to better understand treatment effects in adults aged 18 to 60 with Achilles tendon pain or rupture history.

Immediate Effects of Neuromuscular Electrical Stimulation on Pain and Function in Achilles Tendon Disorders