Trunk Muscle Activity During Wheelchair Ramp Ascent and the Influence of a Geared Wheel on the Demands of Postural Control

Background: Abdominal Hypopressive Training (AHT) provides postural improvement, and enhances deep trunk muscle activation. However, until recently, there was a lack of scientific literature supporting these statements. The major purpose of this study was to investigate the effect of AHT on posture control and deep trunk muscle function. Methods: 125 female participants aged 18–60 were randomly allocated to the Experimental Group (EG), consisting of two sessions of 30 min per week for 8 weeks of AHT, or the Control Group (CG), who did not receive any treatment. Postural control was measured with a stabilometric platform to assess the static balance and the activation of deep trunk muscles (specifically the Transverse Abdominal muscle (TrA)), which was measured by real-time ultrasound imaging. Results: The groups were homogeneous at baseline. Statistical differences were identified between both groups after intervention in the Surface of the Center of Pressure (CoP) Open-Eyes (S-OE) (p = 0.001, Cohen’s d = 0.60) and the Velocity of CoP under both conditions; Open-Eyes (V-OE) (p = 0.001, Cohen´s d = 0.63) and Close-Eyes (V-CE) (p = 0.016, Cohen´s d = 0.016), with the EG achieving substantial improvements. Likewise, there were statistically significant differences between measurements over time for the EG on S-OE (p < 0.001, Cohen´s d = 0.99); V-OE (p = 0.038, Cohen´s d = 0.27); V-CE (p = 0.006, Cohen´s d = 0.39), anteroposterior movements of CoP with Open-Eyes (RMSY-OE) (p = 0.038, Cohen´s d = 0.60) and activity of TrA under contraction conditions (p < 0.001, Cohen´s d = 0.53). Conclusions: The application of eight weeks of AHT leads to positive outcomes in posture control, as well as an improvement in the deep trunk muscle contraction in the female population.

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Intra-abdominal pressure and trunk muscle activity during lifting

Clinical Biomechanics ◽

10.1016/0268-0033(86)90131-2 ◽

1986 ◽

Vol 1 (2) ◽

pp. 117

Keyword(s):

Muscle Activity ◽

Trunk Muscle ◽

Abdominal Pressure

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Distributed moment histogram: A neurophysiology based method of agonist and antagonist trunk muscle activity prediction

Journal of Biomechanics ◽

10.1016/s0021-9290(96)80010-8 ◽

1996 ◽

Vol 29 (12) ◽

pp. 1587-1596 ◽

Cited By ~ 19

Author(s):

Ulrich Raschke ◽

Bernard J. Martin ◽

Don B. Chaffin

Keyword(s):

Muscle Activity ◽

Trunk Muscle ◽

Activity Prediction ◽

Agonist And Antagonist

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The application of parallel robotics to investigate the effect of lumbar bracing on trunk muscle activity

Applied Bionics and Biomechanics ◽

10.1080/11762322.2010.512433 ◽

2010 ◽

Vol 7 (4) ◽

pp. 243-251

Author(s):

Gregory N. Kawchuk ◽

Narasimha G. Prasad ◽

Jonathan Glass ◽

Carolyn Knight ◽

Serena Third ◽

...

Keyword(s):

Muscle Activity ◽

Trunk Muscle ◽

Parallel Robotics

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Trunk muscle activity during dynamic exercises on land and in water for participants with and without chronic low back pain

Physiotherapy ◽

10.1016/j.physio.2017.11.158 ◽

2017 ◽

Vol 103 ◽

pp. e6-e7

Author(s):

L. Linton ◽

S. Valentine ◽

S. Coleman ◽

K. Kaliarntas ◽

S. Psycharakis

Keyword(s):

Low Back Pain ◽

Back Pain ◽

Chronic Low Back Pain ◽

Muscle Activity ◽

Trunk Muscle ◽

Low Back

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Hip and Trunk Muscle Activity and Mechanics During Walking With and Without Unilateral Weight

Journal of Applied Biomechanics ◽

10.1123/jab.2020-0273 ◽

2021 ◽

pp. 1-8

Author(s):

Kerri A. Graber ◽

Kari L. Loverro ◽

Mark Baldwin ◽

Erika Nelson-Wong ◽

Joshua Tanor ◽

...

Keyword(s):

Muscle Activity ◽

Therapeutic Option ◽

Frontal Plane ◽

Estimating Equation ◽

Trunk Muscle ◽

Lower Extremity Injury ◽

Generalized Estimating Equation ◽

Functional Activities ◽

Strengthening Exercises ◽

Hip Abductor

Pelvic drop is caused by decreased hip abductor muscle activity and is associated with lower-extremity injury. Hip abductor strengthening exercises are well established; however, no standard method exists to increase hip abductor activity during functional activities. The purpose of this research was to study the effects of walking with a unilateral weight. A total of 26 healthy adults walked on an instrumented treadmill with and without handheld weight (15%–20% body weight). Muscle activity, kinematic, and kinetic data were collected using surface electromyography, motion capture, and force plates, respectively. Average hip and trunk muscle activity, hip, pelvic, and trunk angles, and peak internal hip moments during stance were compared for each side (contralateral/ipsilateral to the weight) between conditions (unweighted/weighted) using a generalized linear model with generalized estimating equation correction. Interactions between condition and side were observed for muscle activity, frontal plane pelvic and trunk angles, and frontal plane hip moments (P ≤ .003). Compared with the unweighted condition, the weighted condition had higher hip abductor activity contralateral to the weight (P < .001), while no change was found ipsilateral to the weight (P ≥ .790). Similar changes were found for kinematic and kinetic variables. Walking with a unilateral weight may be a therapeutic option to increase functional hip abductor activity.

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