Scientists in Rome and Cardiff reviewed 24 randomised trials of EMS added to real effort, known as NMES+.
They measured strength, power, jumps and, in five papers, muscle mass over 2 to 12 weeks.
Every EMS (NMES+) group rose from baseline. Ten trials beat ordinary training. Soccer players gained force and thicker type II fibres. Squat, jump, sprint and sit-to-stand scores also climbed. Older adults, active women and people after knee surgery appeared too.
The review followed PRISMA rules and ran in the peer-reviewed European Journal of Sport Science. That is why EMS may aid soccer first, then other strength sports and more user groups.
The full post has the trial-by-trial numbers.
https://oriems.fit/blogs/research-digest/ems-sports-training-strength-review