Does Whole Body EMS Improve Strength and Balance

Whole-body electromyostimulation, usually shortened to WB-EMS, applies electrical impulses to several large muscle groups while a person performs guided movements. The impulses trigger muscle contractions in addition to voluntary effort. This mechanism makes WB-EMS a plausible strength-training tool, but it does not guarantee that every physical skill improves. Balance is a good example: stronger muscles can support stability, yet balance also depends on vision, sensation, coordination, reaction time, and task-specific practice.

What researchers tested

A randomized trial in South Korea enrolled 24 young women and compared the same low-intensity resistance program with and without an active WB-EMS suit. Participants trained for 20 minutes, three times per week, for six weeks. Twenty-three participants completed the study. Researchers measured knee muscle function, body composition, cardiopulmonary responses, and postural sway on a soft surface.

The balance result is easy to overstate. The WB-EMS group improved from its own baseline, but the study did not demonstrate a clear advantage over exercise alone in the between-group analysis. The trial was also small and lasted only six weeks.

A second trial adds useful context

A separate ten-week randomized study included 34 sedentary postmenopausal women. Both groups performed aerobic and resistance training, while one group added WB-EMS. Leg strength improved by an estimated 8.68 repetitions in the WB-EMS group versus 5.44 repetitions in the exercise-only group, with a significant group-by-time interaction. However, neither right-leg nor left-leg balance showed a significant WB-EMS advantage. The researchers concluded that WB-EMS favored dynamic leg strength and some other fitness measures, but not balance.

What the evidence supports

These studies support a measured conclusion: supervised WB-EMS used with exercise can contribute to strength development. They do not establish that WB-EMS reliably improves balance. A balance goal should still include balance-specific practice, such as controlled single-leg work, changes of direction, or exercises that challenge coordination at an appropriate level.

Practical takeaway

Use strength-focused language when describing the research. A defensible summary is that WB-EMS can add a muscle stimulus during guided exercise and may support gains in lower-body strength. Avoid promising corrected muscle imbalances or improved balance unless a specific product and protocol have been tested for those outcomes.

References

Park HK, Na SM, Choi SL, Seon JK, Do WH. Physiological Effect of Exercise Training with Whole Body Electric Muscle Stimulation Suit on Strength and Balance in Young Women. Chonnam Med J. 2021;57(1):76-86. doi:10.4068/cmj.2021.57.1.76. Source

Pano-Rodriguez A, Beltran-Garrido JV, Hernandez-Gonzalez V, Reverter-Masia J. Effects of Whole-Body Electromyostimulation on Physical Fitness in Postmenopausal Women. Int J Environ Res Public Health. 2020;17(4):1482. Source