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Do posture and straining influence urinary-flow parameters in normal women?

A M Devreese¹, G Nuyens, F Staes

¹Department of Physiotherapy, K.U. Leuven, 3000 Leuven, Belgium.

Neurourology and Urodynamics

|December 22, 1999

Summary

Forward bending is the best position for comfortable urination, promoting pelvic floor relaxation. Straining during urination increases flow rate but reduces voiding time.

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Area of Science:

Urology
Physiology

Background:

Urinary flow dynamics are influenced by posture and voiding behaviors.
Understanding optimal voiding positions can improve bladder emptying and comfort.

Purpose of the Study:

To investigate the impact of pelvic posture and straining on urinary flow parameters in healthy women.
To identify the most favorable position for relaxed and efficient urination.

Main Methods:

21 healthy women underwent uroflowmetry in five randomized positions: anteversion, anteversion with straining, retroversion, retroversion with straining, and forward bending.
Urinary flow parameters including volume, peak flow, and total time were analyzed.
Voiding curve morphology was assessed for irregularities.

Main Results:

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No significant differences in peak flow, total time, or mean flow were observed between anteversion, retroversion, and forward bending without straining.
Straining significantly increased peak and mean flow rates but decreased total voiding time across all positions.
Voided volumes were lowest in anteversion, and irregularities were least frequent in the forward-bending position.

Conclusions:

The forward-bending position is recommended for urination to facilitate pelvic floor muscle relaxation.
While straining enhances flow rate, it may compromise complete voiding and increase voiding time.