Trunk muscle activity during trunk stabilizing exercise with isometric hip rotation using electromyography and ultrasound

Nakai, Yuki; Kawada, Masayuki; Miyazaki, Takasuke; Kiyama, Ryoji

doi:10.1016/j.jelekin.2019.102357

Cited by 16 publications

(16 citation statements)

References 34 publications

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“…This is because growth- oriented body development shows large health significances in the ideal improvement of muscle functions and the stabilization of body balance ( Schoenfeld, 2010 ). Although this study found inadequate morphological changes and trunk musculatures of athletes who engage in unilateral exercise after CBT, the balance of this study showed the positive results found in previous studies ( Nakai et al, 2019 ; van Dulmen et al, 1997 ). These findings are somewhat in line with researches that reported improvements in body balance and muscle functions and body alignment of the athletes who engage in unilateral exercises.…”

Section: Discussionsupporting

confidence: 50%

Effects of core balance training on Cobb angle, isokinetic torque, and balance in unilateral handed athletes

2020

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This study aimed to provide fundamental data of core balance training (CBT) on Cobb angle and isokinetic torque and balance in unilateral exercised athletes. Forty-eight subjects were divided by control group (CON; n= 16), non-CBT exercised group in unilateral handed athletes (NEG, n= 16), and CBT exercised group in unilateral handed athletes (EG, n= 16), respectively. Although the group by time interaction in the Cobb angle and in the isokinetic torque were not significantly changed in the EG, the balance of the EG showed significantly improved. As conclusions, these results informed that the 16-week CBT would provide a positive effect on the balance except for the Cobb angle and the isokinetic torque.

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Section: Discussionsupporting

confidence: 50%

Effects of core balance training on Cobb angle, isokinetic torque, and balance in unilateral handed athletes

2020

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“…The electrodes were placed above and below the rib margin for EO, this was at the lower margin of the eighth rib; 2 cm inferomedial to the superior anterior iliac spine for IO; approximately 3 cm outside the umbilicus for RA [ 24 ]; on the midpoint of the line connecting the ililac crest and the greater trochanter of the femur for GMed [ 25 , 26 ]; and approximately 4 fingerbreadths distal to the pubic tubercle over the bulk of the adductor muscles for ADD [ 27 ]. The method used for measuring IO activity in this study was previously validated and compared with muscle thickness estimated by ultrasound imaging [ 20 ]. EMG signals were collected for muscle activity using Telemyo DTS system (Noraxon Inc., Scottsdale, AZ, USA).…”

Section: Methodsmentioning

confidence: 99%

“…In addition, GMed and ADD were activated to oppose the external rotation and abduction forces of the right hip joint caused by the pressure applied by the left hand, in this exercise. We reported that in the supine position and 90° knee flexion, participants activated the internal oblique muscles and maintained a neutral position against unilateral hip abduction and abduction loads [ 20 ]. We assumed that if participants exerted pressure on the contralateral lower limbs with their contralateral upper limbs, they would gain activity in the hip adduction and internal rotation muscles as well as in the oblique muscles.…”

Section: Methodsmentioning

confidence: 99%

“…Half-kneeling is an anti-gravity position and has previously been used as a test for core stability [ 19 ]. In previous studies, trunk stabilizing exercises with unilateral isometric hip rotation in the supine position effectively activated ipsilateral internal obliques (IO) [ 20 ], while unilateral dumbbell lifting in the sitting position increased contralateral external obliques (EO) muscle activity [ 21 ]. These findings suggest that the load on the unilateral limb effectively promotes activity of the oblique muscles to counter the rotational moment acting on the trunk.…”

Section: Introductionmentioning

confidence: 99%

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A self-oblique exercise that activates the coordinated activity of abdominal and hip muscles–A pilot study

et al. 2021

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The importance of an interaction between trunk stability muscles and hip muscle function has been suggested. However, reported exercises rarely act on the trunk and hip muscles simultaneously. Here, we devised an abdominal oblique and hip muscle exercise, the Self-oblique exercise (SOE). We examined whether SOE activated abdominal and hip muscles in the supine and half-kneeling positions, compared with abdominal crunch (AC) and plank exercises; and whether participants could modulate the exercise load. Participants were 20 healthy males with some sports experience such as football and baseball on average 10.5 ± 4.0 years. Participants applied self-pressure to their right thighs using the contralateral upper limb with 40% or 70% of the maximum force in Supine SOE and Half- kneeling SOE. The following abdominal and hip muscles were measured using surface electromyography: bilateral external obliques (EO), bilateral internal obliques (IO), right rectus abdominis, right gluteus medius (GMed), and right adductor longus (ADD). All evaluated muscle groups showed significant differences between exercises (p < 0.001). Supine SOE-70% showed 80.4% maximal voluntary contraction (MVC) for left EO (p < 0.017), 61.4% MVC for right IO (p < 0.027), 24.3% MVC for GMed (p < 0.002), and 42.4% MVC for ADD (p < 0.004); these were significantly greatest among all exercises. Muscle activity during Supine SOE-70% was greater than that during Supine SOE-40%. Similarly, Half-kneeling SOE-40% promoted abdominal and hip muscle exertion, and showed more significant activity in GMed (p < 0.006) and ADD (p < 0.001) than AC and plank. SOE could activate abdominal and hip muscles depends on the pressure applied by upper limb. Also, SOE allows participants to modulate the exercise load in a self-controlled step by step manner. Modulation of the exercise load is difficult in AC or plank compared to SOE, and AC or plank cannot obtain simultaneous oblique and hip muscle activity. SOE could be practiced anywhere, in various positions, without any tools.

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“…The relationship between muscle activity and muscle thickness has been investigated by obtaining ultrasound images of various muscles, such as the lumbar multifidus, tibialis anterior, and biceps muscles 2) . In particular, there are many studies on the lower trunk muscle 3,4) , and it has been reported that the increase in muscle activity demonstrated by electromyography is related to muscle thickness in low level contraction of the lumbar multifidus 5) . However, changes in muscle thickness and MCSA involve several factors, including extensibility of muscle and fascia, muscle contraction pattern, neural factors, and muscle extracellular tissue.…”

Section: Introductionmentioning

confidence: 99%

Morphological changes in the long axis of the lower leg muscles during isometric contraction in the sitting position

et al. 2020

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[Purpose] To compare the changes in the muscle cross-sectional area (MCSA) along the long axis of the lower leg muscles at rest and during ankle plantar flexors isometric contraction and to obtain basic information regarding the movement of lower leg muscles during ankle plantar flexors contraction. [Participants and Methods] Sixteen healthy young female participants (20.9 ± 1.2 years) were asked to sit with their ankles in a neutral ankle position. Images were obtained at rest and during isometric contraction of the ankle plantar flexors using gravity magnetic resonance imaging. The MCSAs of the triceps surae and tibialis anterior were measured. [Results] The middle region of the soleus muscle had a lower MCSA on contraction than at rest. In addition, the medial head of the gastrocnemius had a lower MCSA on contraction than at rest in the distal quarter. Moreover, the tibialis anterior had a lower MCSA at rest than on contraction in the middle region. [Conclusion] The area to be used as an indicator and the movement to be induced differ depending on the muscle during isometric contraction of the triceps surae.

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Trunk muscle activity during trunk stabilizing exercise with isometric hip rotation using electromyography and ultrasound

Cited by 16 publications

References 34 publications

Effects of core balance training on Cobb angle, isokinetic torque, and balance in unilateral handed athletes

Effects of core balance training on Cobb angle, isokinetic torque, and balance in unilateral handed athletes

A self-oblique exercise that activates the coordinated activity of abdominal and hip muscles–A pilot study

Morphological changes in the long axis of the lower leg muscles during isometric contraction in the sitting position

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