Differences in the Elastic Modulus of the Lumbar Muscles between Female University Athletes with and Without Low Back Pain

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

doi:10.2139/ssrn.4239718

Cited by 1 publication

(8 citation statements)

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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]…”

Section: Methodsmentioning

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]…”

Section: Methodsmentioning

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]…”

Section: Methodsmentioning

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: Methodsmentioning

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]…”

Section: Methodsmentioning

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: Methodsmentioning

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]…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

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]…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations