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Non-Invasive Electro-Muscular Stimulation for Muscle Strength and Toning

Clinical report utilizes novel electrodes to stimulate the arm muscles more than voluntary exercise alone.

By Emilee Green | Jan 25, 2024

Nkem Ugonabo, MD, MPHWausau, WI (January 25, 2024) – The demand for noninvasive body contouring procedures continues to rise as patients seek effective ways to tone and sculpt while avoiding liposuction-associated downtime and adverse effects. This study utilizes novel electrodes to stimulate the arm muscles more than voluntary exercise alone, highlighting its role in arm toning and strengthening.

The study, led by Anne M. Chapas, MD, is titled “Prospective study to assess the efficacy and safety of a noninvasive electro-muscular stimulation for improvement of muscle strength and muscle toning of the extremities.”  The clinical report, published in Lasers in Surgery and Medicine (LSM), the official journal of the American Society for Laser Medicine and Surgery, Inc. (ASLMS), was selected as the January 2024 Editor’s Choice.

“Our work is the first prospective study to date, demonstrating the safety and efficacy of a novel electrical muscle stimulation-based system for arm strengthening and toning and leading to its FDA approval for this indication,” Chapas said. “As such, it offers patients an effective treatment modality for arm toning, with continued sustained improvement beyond the treatment period.”

Forty-five subjects were enrolled and underwent four treatments over the course of two weeks. Maximum biceps muscle strength increased by an average of 34% and 48%, 30 and 90 days after the last treatment, respectively. Additionally, maximum triceps muscle strength increased by an average of 24% and 27%, 30 and 90 days after treatment, respectively. The study protocol was very well tolerated overall, with no significant adverse events or safety concerns.

Dr. Chapas is the Founder and Medical Director of UnionDerm, a state-of-the-art center for medical and cosmetic skin treatments that implements her philosophy that for patient safety and the best results, medical dermatologic procedures should be performed only by board-certified dermatologists with specific training and experience in these procedures. Dr. Chapas is certified by the American Board of Dermatology, and she is a Fellow of the American Society for Laser Medicine & Surgery, the American Academy of Dermatology, the American College of Mohs Surgery, and the American Society of Dermatologic Surgery. She is also a Clinical Instructor of Dermatology at the Mount Sinai Medical Center.

Editor’s Choice is an exclusive article published in LSM, the official journal of ASLMS. View the complete manuscript.

The American Society for Laser Medicine and Surgery, Inc. (ASLMS) is the largest multidisciplinary professional organization dedicated to the development and application of lasers and related technology for health care applications. ASLMS promotes excellence in patient care by advancing biomedical application of lasers and other related technologies worldwide. ASLMS membership includes physicians, surgeons, nurses, and allied health professionals representing multiple specialties, physicists involved in product development, biomedical engineers, biologists, industry representatives and manufacturers. For more information, visit


The American Society for Laser Medicine and Surgery, Inc. is the world’s largest scientific organization dedicated to promoting research, education and high standards of clinical care in the field of medical laser applications. It provides a forum for the exchange of scientific information and participation in communicating the latest developments in laser medicine and surgery to clinicians, research investigators, government and regulatory agencies, and the public.

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