
Why Don't EMS Diets Help You Lose Weight?

EMS (Electrical Muscle Stimulation) is a method that contracts muscles and stimulates them by applying electrical current.
In spas and exercise equipment, we often see claims that EMS can build muscle without strength training, increase basal metabolism, create a weight-loss-prone constitution, and enable dieting - but how true is this?
However, many people report:
• I'm using EMS for dieting but not losing weight at all...
• I'm applying EMS to my belly and upper arms but the fat isn't reducing...
• The spa recommended EMS to increase my basal metabolism but I'm not losing weight...
It's a fact that many people using EMS for dieting are not losing weight.
As you know, to lose weight efficiently through dieting, the fundamental principle is to prioritize increasing basal metabolism, which accounts for 70% of the body's energy expenditure.
To increase basal metabolism, you must increase muscle mass. This is because muscle tissue is what burns fat in the body.
In other words, efficient weight loss dieting requires increasing muscle mass.
Since "Diet = Increase Muscle," people reach "Muscle = EMS" as a way to increase muscle without exercise or strength training.
From a muscle physiology perspective, of the two types of muscle fibers - slow-twitch (red) fibers and fast-twitch (white) fibers - EMS only activates slow-twitch (red) fibers.
Unfortunately, slow-twitch (red) fibers are not the type that increase muscle mass, so EMS doesn't actually increase muscle or raise basal metabolism. This means losing weight through EMS dieting is fundamentally impossible.
Moreover, even the slow-twitch (red) fibers that are irrelevant to dieting cannot be effectively stimulated by consumer-grade EMS devices. True EMS equipment is difficult to obtain outside of research facilities and university hospitals and costs hundreds of thousands of dollars.
Even with such rare EMS equipment, it's only used for rehabilitation purposes to provide minimum muscle stimulation for patients with lower limb paralysis who cannot move at all.
Therefore, realistically, the logic that regular EMS increases muscle mass, raises basal metabolism, and enables dieting doesn't hold up, making EMS an ineffective weight loss method.
I, personal trainer Toshiaki Ozeki, sincerely hope to help as many people as possible.
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