Contraction fatigue, strength adaptations, and discomfort during conventional versus wide-pulse, high-frequency, neuromuscular electrical stimulation: a systematic review.

Neuromuscular electrical stimulation (NMES) can be delivered in a conventional form (CONV) and using relatively wide-pulses and high-frequencies (WPHF). WPHF is proposed to reduce contraction fatigability and generate larger contractions with less discomfort than CONV; however, there are no systematic reviews to guide the selection of NMES types. This systematic review compared the effects of CONV versus WPHF on contraction fatigability, strength adaptations, and perceived discomfort in clinical and non-clinical populations.