**1. Introduction**

In 1948, Dr. Kegel [1] developed an intravaginal device, a perineometer, for assessing pelvic floor muscle strength. A pressure vaginal probe was connected to a manometer to measure the intravaginal pressure induced by the contraction of the pelvic floor muscles in mmHg. Since then, pressure probes of various shapes and technical properties have been developed [2, 3]. One type of instrument used under standard conditions with a well-guided protocol is very useful for both objectifying the diagnostics and assessing the effect of therapy [4].

The pelvic floor performs two types of activities - tonic and phasic [5, 6], as confirmed by the Deindl study [7]. According to Frawley [3], manometric measurement is one of the most widespread and the advantage is that it allows the measurement of muscle contraction both when lying and standing. This advantage is that incontinence occurs especially in upright positions and therefore examination in these positions will give us information with a higher informative value. It appears that the resting pressure measurement (tonic pressure) is not as reliable in standing (ICC 0.29) and sitting position as in lying (ICC 0.77). Measurement of the pressure of phasic compression of pelvic floor muscle shows good ICC confidence of 0.91 to 0.95 in all body positions [3].

Junginger et al. [8] controlled the decline of the uterine throat and the descent of pelvic organs while increasing intraabdominal pressure, which was prevented by joint activity of the pelvic floor muscles and the transversus abdominis muscles. Iacobellis et al. also conducted a detailed study of the risk of organ descent by MR [9]. Comparing the lying and sitting situation, the difference proved to be statistically significant. This suggests that examination in lying position can underestimate the existing descent of organs.

Bø et al. [10] also ask the question whether a usual manometric examination of the pelvic floor in a lying position is sufficient or whether it is more appropriate to perform examination in a standing position. For standing persons, it has been proved that the pressure increase during will-induced contraction and dwell time have not changed, only the minimum value (tonic contraction) when standing has increased.

The pelvic floor is given responsibility for the continence of urine, stool and the supporting function of the pelvic organs. The connection between the function of the pelvic floor and respiration is rarely considered. Therefore, we wanted to contribute to the knowledge of these connections. In addition, we were interested in the difference in the functional context in the position of the body in a standing and lying position. We performed the measurements even after a minute-long run, which triggered the spontaneous deep breathing process.
