Can EMS Build Muscle? Realistic Results After 8–12 Weeks

EMS builds muscle the same way any strength training does: by giving muscles a challenge they have to adapt to. The electrical impulses add extra contraction on top of the movement you're already doing.

During an EMS session, impulses trigger contractions while you squat, lunge or hold a plank. More muscle fibers get recruited on each rep than with the movement alone.

Muscle responds to load and to load that increases over time, often called progressive overload. With weights, you add pounds. With EMS, your coach raises intensity gradually as your body gets used to it.

Whole-body suits work several large muscle groups at once — legs, glutes, core, back, chest and arms — which is why a short session can cover a lot of ground.

Studies show whole-body EMS produces significant gains in muscle mass and strength in adults who aren't athletes. The evidence is strongest in untrained and older people.

A meta-analysis of 16 studies with 897 non-athletes found an effect on muscle mass of SMD 1.23 (95% CI 0.71–1.76), with leg extension strength at SMD 0.98 and trunk extension strength at SMD 1.08, according to Kemmler et al. in Frontiers in Physiology (2021). In plain English, those are large effects compared with control groups.

A 16-week trial in 48 untrained men compared EMS with high-intensity resistance training. Lean body mass and leg-extensor strength increased in both groups, with no significant difference between them, according to Kemmler et al. in eCAM (2016).

A 54-week trial in 76 women aged 75 ± 4 found appendicular skeletal muscle mass rose 0.4% with EMS while it fell 1.5% in the control group (p = 0.009). Trunk extensor strength rose 10.1% versus a 1.6% drop (p = 0.001), according to Kemmler et al. in AGE (2014).

After 8–12 weeks of EMS, most people should expect to feel stronger and more coordinated before they see big visual changes. The first couple of months are a build-up phase by design.

The international WB-EMS guideline rules out high intensity during the first 8–10 weeks, and allows Borg CR10 effort levels of 7–8 only after 8–10 sessions of regular training, according to Kemmler et al. in Frontiers in Physiology (2023). So the early weeks are about conditioning, not maximum effort.

Percentage gains in research are modest. In the year-long trial of older women, for example, muscle mass rose 0.4% while the control group lost 1.5%, according to Kemmler et al. in AGE (2014). Keeping muscle you would otherwise lose is a real win, even if it doesn't look dramatic in the mirror. Results vary.

If you want to know how to build up intensity sensibly, read how to progress EMS safely.

EMS is not better than lifting weights; in one trial EMS was comparable. The main advantage of EMS is time efficiency and low joint load.

Lifting lets you add heavier and heavier loads over years, and the research behind traditional strength training goes back decades. EMS suits people who are short on time or whose joints don't love heavy barbells.

Many people combine both: EMS as a weekly strength session, plus walking, swimming or the occasional gym workout. For more context, see what EMS research shows.

Building muscle also takes enough protein, recovery and consistency. EMS provides the stimulus; your habits decide whether the muscle actually grows.

• Protein: spread protein across your meals rather than saving it all for dinner.
• Recovery: muscles adapt between sessions, not during them. Leave rest time between hard workouts.
• Frequency: adults need at least 2 days a week of muscle-strengthening activity working all major muscle groups, according to the CDC (2023).
• Sleep and consistency: showing up week after week matters more than any single session.

Muscle also helps with body composition as you age — here's why muscle matters for belly fat after 40.

Tampa Bay golfers, parents and snowbirds use EMS for strength because a short, coached session fits their routines. Each group has its own reason.

Golfers want leg, glute and trunk strength for rotation and for walking 18 holes in the heat. Busy professionals in Countryside and Palm Harbor like that 20 minutes can fit into a lunch break. Snowbirds use the winter season in Florida to keep their muscle and strength up instead of losing ground.

Pulse tracks muscle progress with a 3D body scan at your first visit and rescans over time. That way you compare real body composition, not just how your jeans fit.

Your first 3D body scan is free, along with your first session. From there, you can build strength with coached EMS in 20-minute sessions, private or small group, with your coach adjusting intensity as you progress. When it comes to packages, ask the studio about packages — your first session is free.

"EMS has helped me gain more muscle than ever before in my life" — Liz M., Google review. Results vary.