Electromyographic Evaluation of Abdominal-Muscle Function With and Without Concomitant Pelvic-Floor-Muscle Contraction

Context:Coactivation of abdominal and pelvic-floor muscles (PFM) is an issue considered by researchers recently. Electromyography (EMG) studies have shown that the abdominal-muscle activity is a normal response to PFM activity, and increase in EMG activity of the PFM concomitant with abdominal-muscle contraction was also reported.Objective:The purpose of this study was to compare the changes in EMG activity of the deep abdominal muscles during abdominal-muscle contraction (abdominal hollowing and bracing) with and without concomitant PFM contraction in healthy and low-back-pain (LBP) subjects.Design:A 2 × 2 repeated-measures design.Setting:Laboratory.Participants:30 subjects (15 with LBP, 15 without LBP).Main Outcome Measures:Peak rectified EMG of abdominal muscles.Results:No difference in EMG of abdominal muscles with and without concomitant PFM contraction in abdominal hollowing (P = .84) and abdominal bracing (P = .53). No difference in EMG signal of abdominal muscles with and without PFM contraction between LBP and healthy subjects in both abdominal hollowing (P = .88) and abdominal bracing (P = .98) maneuvers.Conclusion:Adding PFM contraction had no significant effect on abdominal-muscle contraction in subjects with and without LBP.

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Postural Sensorimotor Control on Anorectal Pressures and Pelvic Floor Muscle Tone and Strength: Effects of a Single 5P® LOGSURF Session. A Cross-Sectional Preliminary Study

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18073708 ◽

2021 ◽

Vol 18 (7) ◽

pp. 3708

Author(s):

Laura Fuentes-Aparicio ◽

Beatriz Arranz-Martín ◽

Beatriz Navarro-Brazález ◽

Javier Bailón-Cerezo ◽

Beatriz Sánchez-Sánchez ◽

...

Keyword(s):

Pelvic Floor ◽

Outcome Measures ◽

Muscle Tone ◽

Pelvic Floor Muscle ◽

Pelvic Floor Dysfunction ◽

Functional Condition ◽

Abdominal Muscle ◽

Medium Effect ◽

Abdominal Muscles ◽

Cross Sectional

Pelvic floor dysfunction (PFD) is a functional condition present most frequently in women. Despite pelvic floor muscle training being considered by the International Continence Society (ICS) as the first-line treatment in uncomplicated urinary incontinence, other more comprehensive postural methods as 5P® LOGSURF have emerged. This preliminary cross-sectional study explores the effects of a single 5P® LOGSURF session on pelvic floor muscle (PFM) tone and strength (MVC), resting anal tone, intrarectal pressure, and deep abdominal muscles activation. Thirty women were included (11 without PFD and 19 with PFD). Primary outcome measures were PFM tone, PFM MVC and resting anal tone and secondary measures outcomes were intrarectal pressure and deep abdominal activation. All outcome measures were collected before, throughout and after a single 30′ 5P® LOGSURF session. The findings from this study suggest that PFM tone (PFD group: p = 0.09, d = 0.72; non-PFD group: p = 0.003, d = 0.49) and PFM MVC (PFD group: p = 0.016; non-PFD group: p = 0.005) decreased in both groups after a single 5P® LOGSURF session, with a medium effect size for women with PFD. Contrarily, deep abdominal muscle MVC increased (PFD group: p < 0.001; non-PFD group: p = 0.03). Intrarectal pressure and resting anal tone decreased in both groups throughout the session. These results suggest that 5P® LOGSURF method may be interesting if is performed by women with mild symptoms of PFD or healthy women to achieve a decrease in PFM tone in women who manifested pain to intracavitary techniques or practices. Further research with higher sample sizes and long-term are necessary for generalizing.

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EMG Changes of the ECU Muscle with Exposure to Repetitive Ulnar Deviation

Proceedings of the Human Factors and Ergonomics Society Annual Meeting ◽

10.1177/154193120204601317 ◽

2002 ◽

Vol 46 (13) ◽

pp. 1086-1089

Author(s):

Kirsty J. Bennie ◽

Vincent M. Ciriello ◽

Peter W. Johnson ◽

Jack Tigh Dennerlein

Keyword(s):

Repeated Measures ◽

Early Stage ◽

Work Conditions ◽

Emg Activity ◽

Median Frequency ◽

Repetitive Work ◽

Ulnar Deviation ◽

Repeated Measures Design ◽

Emg Signal ◽

And Control

Our objective was to quantify changes in muscle EMG activity due to repetitive work. Using a repeated measures design, 13 females participated in 3 conditions, each lasting two eight-hour days: a control inactive condition, and two repetitive work conditions with ulnar deviation tasks at 20 and 25 repetitions per minute. EMG of the extensor carpi ulnaris muscle (ECU) was recorded during voluntary isometric contractions (20% and 60% MVC) eight times throughout the work and control days. The amplitude of the EMG signal was lower on workdays compared to the control days. Initial median frequency of the EMG signal showed no change between the control and workdays; however, the decline of the median frequency with respect to time over the course of each isometric contraction was steeper during workdays compared to control days. These changes suggest that the muscles are in an early stage of fatigue when working for an eight-hour workday.

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Effect of Humeral-Elevation Angle on Electromyographic Activity in the Serratus Anterior During the Push-Up-Plus Exercise

Journal of Sport Rehabilitation ◽

10.1123/jsr.2015-0090 ◽

2017 ◽

Vol 26 (1) ◽

pp. 57-64 ◽

Cited By ~ 6

Author(s):

Ui-jae Hwang ◽

Oh-yun Kwon ◽

In-cheol Jeon ◽

Si-hyun Kim ◽

Jong-hyuck Weon

Keyword(s):

Outcome Measures ◽

Muscle Activity ◽

Repeated Measures ◽

Elevation Angle ◽

Emg Activity ◽

Electromyographic Activity ◽

Serratus Anterior ◽

Repeated Measures Design ◽

Activity Ratios ◽

Push Up

Context:The push-up-plus (PP) exercise has been recommended for strengthening of the serratus anterior (SA). Previous studies have investigated the effect of different stability properties of the base of support to adjust the difficulty level of SA muscle-strengthening exercises in the PP position. However, the optimal humeral-elevation angle (HEA) for selective activation and maximum contraction of the SA during PP has not been investigated.Objectives:To assess the effects of HEA during PP on electromyographic (EMG) activity in the SA, upper trapezius (UT), and pectoralis major (PM) and on the UT:SA and PM:SA activity ratios.Design:Comparative, repeated-measures design.Setting:University research laboratory.Participants:29 healthy men.Main Outcome Measures:The subjects performed PP at 3 different HEAs (60°, 90°, and 120°); EMG activity in the SA, UT, and PM was measured, and the UT:SA and PM:SA activity ratios were calculated. Differences in muscle activity and ratios between the 60°, 90°, and 120° HEAs were assessed using 1-way repeated-measures analysis of variance; the Bonferroni correction was applied.Results:SA muscle activity was significantly increased, in order of magnitude, at the 120°, 90°, and 60° HEAs. UT:SA and PM:SA activity ratios were significantly greater during performance of the PP at an HEA of 60° than at HEAs of 120° and 90°.Conclusion:The results suggest that an HEA of 120° should be used during performance of the PP because it produces greater SA activation than HEAs of 60° and 90°.

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Cryotherapy Does Not Affect Peroneal Reaction Following Sudden Inversion

Journal of Sport Rehabilitation ◽

10.1123/jsr.16.4.285 ◽

2007 ◽

Vol 16 (4) ◽

pp. 285-294 ◽

Cited By ~ 9

Author(s):

Christine L. Berg ◽

Joseph M. Hart ◽

Riann Palmieri-Smith ◽

Kevin M. Cross ◽

Christopher D. Ingersoll

Keyword(s):

Ankle Joint ◽

Outcome Measures ◽

Repeated Measures ◽

Treatment Time ◽

Post Treatment ◽

Emg Activity ◽

Root Mean Square Amplitude ◽

Lateral Ankle ◽

Repeated Measures Design ◽

And Control

Context:If ankle joint cryotherapy impairs the ability of the ankle musculature to counteract potentially injurious forces, the ankle is left vulnerable to injury.Objective:To compare peroneal reaction to sudden inversion following ankle joint cryotherapy.Design:Repeated measures design with independent variables, treatment (cryotherapy and control), and time (baseline, immediately post treatment, 15 minutes post treatment, and 30 minutes post treatment).Setting:University research laboratory.Patients or Other Participants:Twenty-seven healthy volunteers.Intervention(s):An ice bag was secured to the lateral ankle joint for 20 minutes.Main Outcome Measures:The onset and average root mean square amplitude of EMG activity in the peroneal muscles was calculated following the release of a trap door mechanism causing inversion.Results:There was no statistically significant change from baseline for peroneal reaction time or average peroneal muscle activity at any post treatment time.Conclusions:Cryotherapy does not affect peroneal muscle reaction following sudden inversion perturbation.

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The response of the abdominal muscles to pelvic floor muscle contraction in women with and without stress urinary incontinence using ultrasound imaging

Neurourology and Urodynamics ◽

10.1002/nau.20959 ◽

2010 ◽

Vol 30 (1) ◽

pp. 117-120 ◽

Cited By ~ 15

Author(s):

Amir Massoud Arab ◽

Mahshid Chehrehrazi

Keyword(s):

Urinary Incontinence ◽

Stress Urinary Incontinence ◽

Pelvic Floor ◽

Muscle Contraction ◽

Ultrasound Imaging ◽

Pelvic Floor Muscle ◽

Abdominal Muscles ◽

Pelvic Floor Muscle Contraction

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An electromyographic study of abdominal muscle activity in children with spastic cerebral palsy

South African Journal of Physiotherapy ◽

10.4102/sajp.v73i1.341 ◽

2017 ◽

Vol 73 (1) ◽

Cited By ~ 1

Author(s):

Saviour Adjenti ◽

Graham Louw ◽

Jennifer Jelsma ◽

Marianne Unger

Keyword(s):

Cerebral Palsy ◽

Muscle Activity ◽

Repeated Measures ◽

Rank Order ◽

Abdominal Muscle ◽

Emg Activity ◽

Spastic Cerebral Palsy ◽

Abdominal Muscles ◽

Neuromuscular Activity ◽

Inadequate Knowledge

Background: Inadequate knowledge in the recruitment patterns of abdominal muscles in individuals with spastic-type cerebral palsy (STCP).Objectives: To determine whether there is any difference between the neuromuscular activity (activation pattern) of the abdominal muscles in children with STCP and those of their typically developing (TD) peers.Method: The NORAXAN® electromyography (EMG) was used to monitor the neuromuscular activity in abdominal muscles of individuals with STCP (n = 63), and the results were compared with the findings from age-matched TD individuals (n = 82).Results: EMG frequencies were recorded during rest and during active states and compared using repeated measures ANOVA. Spearman’s rank order correlation was used to explore relationships between age, body mass index and abdominal muscle activity. With the exception of the rectus abdominis (RA) muscle, the pattern of neuromuscular activity in children with STCP differs significantly from that of their TD peers. Three of the muscles – external oblique abdominis (EO), internal oblique abdominis (IO) and RA – in both groups showed significant changes (p < 0.001) in the frequency of EMG activity between the resting and active states. An elevated EMG activity at rest in the EO and IO was recorded in the STCP group, whereas the RA during resting and active stages showed similar results to TD individuals.Conclusion: The findings from this study suggest that the RA could be targeted during rehabilitation regimens; however, the force generated by this muscle may not be sufficient for the maintenance of trunk stability without optimal support from the EO and IO muscles.

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