Use of Neuromuscular Electrical Stimulation for Abdominal and Quadriceps Muscle Strengthening: A Randomized Controlled Trial

BACKGROUND Radiographic imaging has demonstrated muscle hypertrophy after treatment with noninvasive body contouring devices that target skeletal muscles. OBJECTIVE This pilot study sought to evaluate whether increased muscle mass translated to improved functional strength and endurance. METHODS A prospective, single-center, randomized open-label controlled study included 26 subjects randomized into 3 groups: 2 treatment groups and 1 control group. Both treatment groups received 4 neuromuscular electrical stimulation (NMES) treatments over a 2-week period. Muscle performance testing was conducted at baseline and 2-week and 4-week posttreatment. Anthropometric measurements were assessed at baseline and at 4-week posttreatment. Study participants completed subject satisfaction surveys and a personal experience assessment. RESULTS Treatment with NMES resulted in statistically significant improvements in abdominal and quadriceps strength and endurance from baseline through 4-week posttreatment. Mean waist circumference decreased and quadriceps circumference increased, both nonsignificantly. Subject satisfaction regarding abdominal and quadriceps strength was reported as "satisfied or very satisfied" in 89% and 92% at 4-week and 8-week posttreatment, respectively. CONCLUSION Treatment of the abdomen and quadriceps with NMES leads to significant improvements in muscular strength and endurance.