The<unk>  is a proposed alternative to Kegel exercises. The idea is that by strengthening your sphincter muscles (eye muscle: orbicularis oculi and mouth muscle: orbicularis oris), the contractions would also strengthen the sphincter muscles in the pelvic floor. Evidence to support its use is lacking.
Paula method
Jaeger chart
Maxwell–Fricke equation
Darrow Yannet diagram
Wiggers diagram
Monoyer chart
Alpins method
Ogden tables