Differences in the elastic modulus of the lumbar muscles between female athletes with and without low back pain

Miyamori, Takayuki; Saito, Taiki; Aoyagi, Masashi; Nozu, Shojiro; Masui, Yuki; Ishihara, Yoshihiko; Shimasaki, Yu; Yoshimura, Masafumi

doi:10.1016/j.clinbiomech.2023.105968

Cited by 2 publications

(8 citation statements)

References 31 publications

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“…The intervention region was defined as increased stiffness in this region in participants with LBP and history of LBP, irrespective of pain location, as reported in our previous study. [18] Indiba activ HCR801 (INDIBA, Barcelona, Spain) operating at a frequency of 448 kHz was used for CRMF intervention (Fig. 2).…”

Section: Interventionsmentioning

confidence: 99%

“…Back muscle stiffness was evaluated using shear wave ultrasound imaging equipment (Applio300; Canon Medical Systems, Tochigi, Japan), based on a previous study. [18] The shear elastic moduli of the right multifidus and erector spinae were evaluated in 2 positions: the rest position, in which the participants were placed in the prone position on the bed, and the stretch position, in which the participants sat on a chair with their trunks flexed at a 35° angle. These 2 positions were selected because the shear elastic modulus of the muscle can change when it is stretched.…”

Section: Measurementmentioning

confidence: 99%

“…In each position, the participants were asked to relax as much as possible while the pillow and cushion were placed on the head and abdomen, respectively, to reduce the muscle activity of the lower back. [18] Identification of the multifidus and erector spinae was performed using the B-mode of SWE and a linear array ultrasound probe (PLT-705BT, Cannon Medical Systems, Tochigi, Japan) with frequency ranging between 4.0 MHz and 14.0 MHz. The stiffness of the right multifidus was measured 2 cm lateral to the middle region between the L4 and L5 spinous processes, and that of the right erector spinae was measured 7 cm lateral to the L3 spinous process (iliocostalis lumborum).…”

Section: Measurementmentioning

confidence: 99%

“…The stiffness of the right multifidus was measured 2 cm lateral to the middle region between the L4 and L5 spinous processes, and that of the right erector spinae was measured 7 cm lateral to the L3 spinous process (iliocostalis lumborum). [18,19] The details of the measurements are described in our previous study. [18] The reliability and validity of assessing lumbar muscle stiffness have been established.…”

Section: Measurementmentioning

confidence: 99%

“…[18,19] The details of the measurements are described in our previous study. [18] The reliability and validity of assessing lumbar muscle stiffness have been established. [9,18,20,21] To measure the shear elastic modulus, 3 circular regions of interest (ROIs) with a diameter of 10 mm were set within the SWS box (20 mm × 20 mm), with 1 placed at the top center of the box and the others at the bottom.…”

Section: Measurementmentioning

confidence: 99%

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Effects of high-frequency hyperthermia on the elastic modulus of the lumbar muscle in female athletes with low back pain: A randomized crossover trial

Miyamori,

Aoyagi,

Saito

et al. 2024

Medicine

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Objective: To investigate the effects of capacitive and resistive monopolar radiofrequency (CRMF) on the shear elastic modulus of the multifidus and erector spinae muscles in female athletes with low back pain (LBP) and a history of LBP. Design: Randomized crossover trial. Setting: Academic institution. Participants: Twenty female university athletes with LBP or a history of LBP were included. Interventions: All participants received CRMF, hotpack, and sham (CRMF without power) in a random order on the right side of the lumbar region. More than 2 days were allocated between the experiments to eliminate any residual effects. Main outcome measures: The shear elastic moduli of the right multifidus and erector spinae were evaluated in the prone (rest) position while sitting with 35° trunk flexion (stretched) using shear wave ultrasound imaging equipment. The moduli were measured before, immediately after, and 30 minutes after the intervention. Results: Repeated-measures 2-way analysis of variance and post hoc analysis showed that the moduli of the CRMF group were significantly lower than those of the sham group in the stretched position immediately after intervention (P = .045). This difference diminished 30 minutes after the intervention (P = .920). Conclusions: CRMF can be used to reduce the shear elastic modulus of the multifidus muscle in the short term. Further studies are warranted to determine how to provide longer effects. Trial registration: None.

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Section: Interventionsmentioning

confidence: 99%

Section: Measurementmentioning

confidence: 99%

Section: Measurementmentioning

confidence: 99%

Section: Measurementmentioning

confidence: 99%

Section: Measurementmentioning

confidence: 99%

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Effects of high-frequency hyperthermia on the elastic modulus of the lumbar muscle in female athletes with low back pain: A randomized crossover trial

Miyamori,

Aoyagi,

Saito

et al. 2024

Medicine

Self Cite

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Changes of trunk muscle stiffness in individuals with low back pain: a systematic review with meta-analysis

Vatovec,

Voglar

2024

BMC Musculoskelet Disord

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Background Low back pain (LBP) is one of the most common musculoskeletal conditions. People with LBP often display changes of neuromuscular control and trunk mechanical properties, including trunk stiffness. Although a few individual studies have examined back muscle stiffness in individuals with LBP, a synthesis of the evidence appears to be lacking. Therefore, the aim of this systematic review with meta-analysis was to synthesize and evaluate the available literature investigating back muscle stiffness in association with LBP. Methods We conducted a systematic review of the literature according to the PRISMA guidelines. We searched Pubmed, Scopus, Web of Science and ScienceDirect for studies, that compared back muscle stiffness, measured either by ultrasound-based elastography or myotonometry, between individuals with and without LBP. Pooled data of the included studies were presented descriptively. Additionally, we performed two meta-analyses to calculate the standardized mean difference between the two groups for resting stiffness of the multifidus and erector spinae muscle. For both meta-analyses, the random effect model was used and the weight of individual studies was calculated using the inverse-variance method. The quality of the included studies was assessed using the Joanna Briggs Institute Critical Appraisal Checklist for Analytical Cross-Sectional studies. Furthermore, the certainty of evidence was evaluated using the GRADE approach. Results Nine studies were included in our systematic review. Our results suggest that individuals with LBP have higher stiffness of the multifidus (SMD = 0.48, 95% CI: 0.15 – 0.81, p < 0.01; I2 = 48 %, p = 0.11) and erector spinae at rest (SMD = 0.37, 95% CI: 0.11 – 0.62, p < 0.01; I2 = 39 %, p = 0.14) compared to asymptomatic controls. On the other hand, the evidence regarding muscle stiffness during submaximal contractions is somewhat contradictory. Conclusions Based on the findings of this systematic review we conclude that people with LBP may have higher back muscle stiffness compared to asymptomatic controls. Addressing muscle stiffness might represent an important goal of LBP treatment. Nevertheless, our findings should be interpreted with extreme caution due to a limited quality of evidence, small number of included studies and differences in measurement methodology.

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Differences in the elastic modulus of the lumbar muscles between female athletes with and without low back pain

Cited by 2 publications

References 31 publications

Effects of high-frequency hyperthermia on the elastic modulus of the lumbar muscle in female athletes with low back pain: A randomized crossover trial

Effects of high-frequency hyperthermia on the elastic modulus of the lumbar muscle in female athletes with low back pain: A randomized crossover trial

Changes of trunk muscle stiffness in individuals with low back pain: a systematic review with meta-analysis

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