Pelvic floor muscle activity patterns in women with and without stress urinary incontinence while running - 29/11/20
Highlights |
• | Women without urinary incontinence and those with stress urinary incontinence showed specific differences in power spectra shifts of pelvic floor muscles while running. |
• | Women showed differences in pre- and post-initial contact activation behavior of pelvic floor muscles. |
• | The study found muscular preparation and adaptation a few milliseconds before initial contact during running. |
Abstract |
Background |
High-impact activities are often related to urine leakage in women, so deeper insight into continence mechanisms of pelvic floor muscles (PFMs) while running is needed. Therefore, simultaneous information about the intensity of PFM muscle activity and fibre recruitment behavior at each time point of the gait cycle can help in understanding PFM activity patterns.
Objective |
We aimed to analyse spectral changes of the pre- and post-initial contact phase during running at 3 different speeds and to compare women with stress urinary continence (SUI) to those without SUI by using a wavelet approach.
Methods |
PFM electromyography (EMG) was recorded during 7, 11 and 15km/h treadmill running and analysed with Morse wavelets. The relative distribution of power was extracted during 6 time intervals of 30ms, from 30ms before to 150ms after initial contact.
Results |
We included 28 women without SUI (mean [SD] age 38.9 [10.3] years) and 21 with SUI (mean age 46.1 [9.9] years). The groups did not differ in power spectra for each time interval. However, we found significantly less EMG intensity in the lower frequency bands but more intensity in the higher frequency bands in the pre-initial contact phase than at post-initial contact.
Conclusion |
Morse wavelets could be used to extract differences between pre- and post-initial contact activation behavior of PFMs during different running speeds as well as spectral changes toward high or low frequencies. This information sheds light on specific differences in involuntary reflexive activation patterns while running. Muscular preparation and adaptation a few milliseconds before initial contact could be helpful.
Le texte complet de cet article est disponible en PDF.Keywords : Activation analysis, Electromyography, Wavelet analysis, Motor unit recruitment, Jogging
Plan
Vol 63 - N° 6
P. 495-499 - novembre 2020 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.