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Patients whose muscular contraction occurs below the resting muscular length, as with overactive pelvic floor muscle (OPFM), experience muscular weakness and early time-to-fatigue.[sup.15] To accommodate its supportive function, the PFM has a higher percentage of slow-fibres to maintain its tone and contraction, except during voiding and defecation.
Commercial broadcasters are far less enthusiastic about the need for OPFM. "Low-power would benefit a very small number of Americans," Wharton says.