Acute Physiological Response of Lumbar Intervertebral Discs to High-load Deadlift Exercise

Yanagisawa, Osamu; Oshikawa, Tomoki; Matsunaga, Naoto; Adachi, Gen; Kaneoka, Koji

doi:10.2463/mrms.mp.2020-0052

Cited by 5 publications

(4 citation statements)

References 20 publications

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“…A similar trend was observed in humas after 5 days of dry immersion simulating microgravity in space 75 . After deadlifting exercise changes in MD of the NP between −2.8% and −6.5% were detected in the lumbar IVDs 76 …”

Section: Musculoskeletal Applications Of Quantitative Diffusionsupporting

confidence: 78%

“…ADC, apparent diffusion coefficient; IVD, intervertebral disc (Reprinted Fig. 3 from reference 76 under a CC‐BY‐NC‐ND license, https://creativecommons.org/licenses/by‐nc‐nd/4.0/. )…”

Section: Musculoskeletal Applications Of Quantitative Diffusionmentioning

confidence: 99%

“…75 After deadlifting exercise changes in MD of the NP between À2.8% and À6.5% were detected in the lumbar IVDs. 76…”

Section: Skeletal Musclementioning

confidence: 99%

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Applications of Diffusion‐Weighted MRI to the Musculoskeletal System

Raya

Duarte

Wang

et al. 2023

Magnetic Resonance Imaging

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Diffusion‐weighted imaging (DWI) is an established MRI technique that can investigate tissue microstructure at the scale of a few micrometers. Musculoskeletal tissues typically have a highly ordered structure to fulfill their functions and therefore represent an optimal application of DWI. Even more since disruption of tissue organization affects its biomechanical properties and may indicate irreversible damage. The application of DWI to the musculoskeletal system faces application‐specific challenges on data acquisition including susceptibility effects, the low T2 relaxation time of most musculoskeletal tissues (2–70 msec) and the need for sub‐millimetric resolution. Thus, musculoskeletal applications have been an area of development of new DWI methods. In this review, we provide an overview of the technical aspects of DWI acquisition including diffusion‐weighting, MRI pulse sequences and different diffusion regimes to study tissue microstructure. For each tissue type (growth plate, articular cartilage, muscle, bone marrow, intervertebral discs, ligaments, tendons, menisci, and synovium), the rationale for the use of DWI and clinical studies in support of its use as a biomarker are presented. The review describes studies showing that DTI of the growth plate has predictive value for child growth and that DTI of articular cartilage has potential to predict the radiographic progression of joint damage in early stages of osteoarthritis. DTI has been used extensively in skeletal muscle where it has shown potential to detect microstructural and functional changes in a wide range of muscle pathologies. DWI of bone marrow showed to be a valuable tool for the diagnosis of benign and malignant acute vertebral fractures and bone metastases. DTI and diffusion kurtosis have been investigated as markers of early intervertebral disc degeneration and lower back pain. Finally, promising new applications of DTI to anterior cruciate ligament grafts and synovium are presented. The review ends with an overview of the use of DWI in clinical routine.Evidence Level5Technical EfficacyStage 3

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Section: Musculoskeletal Applications Of Quantitative Diffusionsupporting

confidence: 78%

Section: Musculoskeletal Applications Of Quantitative Diffusionmentioning

confidence: 99%

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Applications of Diffusion‐Weighted MRI to the Musculoskeletal System

Raya

Duarte

Wang

et al. 2023

Magnetic Resonance Imaging

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“…Such heavy and dynamic lifting tasks need further investigation in the tactical population as the spinal loads experienced during these tasks appear to exceed the existing evidence concerning the threshold of injury for spinal segments. Even if not causing acute injury, chronic exposure to such high‐spinal loads can lead to micro fractures, degenerative and pathoanatomical changes that ultimately could result in low‐back pain 40–42 . Therefore, in the absence of data related to alterations in muscle parameters (e.g., moment arms, areas and wrapping mechanism) with strengthening exercises, the threshold of spinal injuries in tactical population, as well as lack of evidence concerning the long‐term effects of chronic exposure to heavy deadlift, broad application of a screening tools like the ACFT may unnecessarily put some service members at a higher risk of low‐back injury or LBP.…”

Section: Discussionmentioning

confidence: 99%

Trunk muscle forces and spinal loads during heavy deadlift: Effects of personalization, muscle wrapping, muscle lever arm, and lumbopelvic rhythm

Ramirez

Ghezelbash

Shirazi‐Adl

et al. 2023

Numer Methods Biomed Eng

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Heavy deadlift is used as a physical fitness screening tool in the U.S. Army. Despite the relevance of such a screening tool to military tasks performed by Service Members, the biomechanical impact of heavy deadlift and its risk of lowback injury remain unknown. A kinematics-driven musculoskeletal model of spine was implemented to investigate biomechanics of the lower back in a volunteer (23 years old, height of 1.82 m, and body mass of 98.8 kg) during a 68 kg deadlift. In search of protective mechanisms, effects of model personalization and variations in trunk musculature and lumbopelvic rhythm were also investigated. The net moment, compression and shear forces at the L5-S1 reached peaks of 684 Nm, 17.2 and 4.2 kN, respectively. Geometrical personalization and changes in lumbopelvic rhythm had the least effects on predictions while increases in muscle moment arms (40%) had the largest effects that caused, respectively, 32% and 36% decrease in the maximum compressive and shearing forces. Initiating wrapping of back muscles at farther distances from the spine had opposing effects on spinal loads; peak compression at the L5-S1 decreased by 12% whereas shear increased by 19%. Despite mechanisms considered, spinal loads during heavy deadlift exceed the existing evidence concerning the threshold of injury for spinal segments, suggesting the vulnerability to injury. Chronic exposure to such high-spinal loads may lead to (micro) fractures, degeneration, pathoanatomical changes and finally low-back pain.

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