1
|
Asayama A, Yagi M, Taniguchi M, Hirono T, Kato T, Hayashi R, Ichihashi N. Effect of soft tissue tension around the knee joint on medio-lateral patellar position. J Biomech 2024; 168:112137. [PMID: 38710152 DOI: 10.1016/j.jbiomech.2024.112137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 04/28/2024] [Accepted: 05/03/2024] [Indexed: 05/08/2024]
Abstract
Patellofemoral pain (PFP) is one of the most common sports injuries of the knee joint and has a high persistence and recurrence rate. Medio-lateral patellar position in the knee extension position during contraction is associated with PFP. However, soft tissue tension that most influences the medio-lateral patellar position in the knee extension position during contraction in vivo is unclear. We aimed to clarify the relationship between medio-lateral patellar position and soft tissue tension around the knee joint. Twelve patients with PFP and 20 healthy participants were included. Medio-lateral patellar position and tension of the rectus femoris, vastus lateralis (VL), vastus medialis, iliotibial band (ITB), lateral patellofemoral ligament, and medial patellofemoral ligament were measured during contraction and rest. The tensions of the VL and ITB during contraction and the medio-lateral patellar position at rest were significantly associated with medio-lateral patellar position during contraction (β = 0.449, 0.354, and 0.393, respectively). In addition, the tension of ITB was significantly associated with the medio-lateral patellar position at rest (β = 0.646). These relationships were not affected by the presence of PFP. These findings suggest that the patellar position during contraction became more lateral as the tension in the VL and ITB increased, regardless of the presence of PFP. These results may facilitate the prevention and treatment of PFP.
Collapse
Affiliation(s)
- Akihiro Asayama
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan; Department of Rehabilitation, Japanese Red Cross Nagahama Hospital, Japan
| | - Masahide Yagi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan.
| | - Masashi Taniguchi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan
| | - Tetsuya Hirono
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan; Research Fellow of the Japan Society for the Promotion of Science Kojimachi Business Center Building, Japan
| | - Takehiro Kato
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan
| | - Remi Hayashi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan
| | - Noriaki Ichihashi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan
| |
Collapse
|
2
|
Asayama A, Taniguchi M, Yagi M, Fukumoto Y, Hirono T, Yamagata M, Nakai R, Ichihashi N. Reliability and validity of quantitative ultrasound for evaluating patellar alignment: A pilot study. J Orthop Sci 2024; 29:602-608. [PMID: 36898946 DOI: 10.1016/j.jos.2023.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 02/15/2023] [Accepted: 02/26/2023] [Indexed: 03/12/2023]
Abstract
BACKGROUND Patellar malalignment is a risk factor of patellofemoral pain. Evaluation of the patellar alignment have mostly used magnetic resonance imaging (MRI). Ultrasound (US) is a non-invasive instrument that can quickly evaluate patellar alignment. However, the method for evaluating patellar alignment via US has not been established. This study aimed to investigate the reliability and validity of evaluating patellar alignment via US. METHODS The sixteen right knees were imaged via US and MRI. US images were obtained at two sites of the knee to measure US-tilt as the index of patellar tilt. Using a single US image, we measured US-lateral distance and US-angle as the index of patellar shift. All US images were obtained three times each by two observers to evaluate reliabilities. Lateral patellar angle (LPA), as the indicators of patellar tilt, and lateral patella distance (LPD) and bisect offset (BO), as the indicators of patellar shift, were measured via MRI. RESULTS US measurements provided high intra- (within-day and between days) and interobserver reliabilities with exception of interobserver reliability of US-lateral distance. Pearson correlation coefficient indicated that US-tilt is significantly positively correlated with LPA (r = 0.79), and US-angle is significantly positively correlated with LPD (r = 0.71) and BO (r = 0.63). CONCLUSION Evaluating patellar alignment via US showed high reliabilities. US-tilt and US-angle showed moderate to strong correlation with MRI indices of patellar tilt and shift via MRI, respectively. US methods are useful for evaluating accurate and objective indices of patellar alignment.
Collapse
Affiliation(s)
- Akihiro Asayama
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.
| | - Masashi Taniguchi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Masahide Yagi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Yoshihiro Fukumoto
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan; Department of Physical Medicine and Rehabilitation, Kansai Medical University, 2-5-1 Shinmachi, Hirakata, Osaka, 573-1010, Japan
| | - Tetsuya Hirono
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan; Research Fellow of Japan Society for the Promotion of Science Kojimachi Business Center Building, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo, 102-0083, Japan
| | - Momoko Yamagata
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan; Research Fellow of Japan Society for the Promotion of Science Kojimachi Business Center Building, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo, 102-0083, Japan; Faculty of Human Development, Graduate School of Human Development and Environment, Kobe University, 3-11 Tsurukabuto, Nada-ku, Kobe, Hyogo, 657-0011, Japan
| | - Ryusuke Nakai
- Kokoro Research Center, Kyoto University, 46 Shimoadachi-cho, Yoshida Sakyo-ku, Kyoto, 606-8507, Japan
| | - Noriaki Ichihashi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| |
Collapse
|
3
|
Taniguchi M, Asayama A, Yagi M, Fukumoto Y, Hirono T, Yamagata M, Nakai R, Kobayashi M, Ichihashi N. Examination of knee extensor and valgus moment arms of the patellar tendon in older individuals with and without knee osteoarthritis. Clin Biomech (Bristol, Avon) 2024; 113:106212. [PMID: 38387145 DOI: 10.1016/j.clinbiomech.2024.106212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/23/2024] [Accepted: 02/19/2024] [Indexed: 02/24/2024]
Abstract
BACKGROUND Joint moment arm is a major element that determines joint torque. This study aimed to investigate factors associated with knee extensor and valgus moment arms of the patellar tendon in older individuals with and without knee osteoarthritis. METHODS Thirty-six participants with knee osteoarthritis (mean age, 78.1 ± 6.0 years) and 43 healthy controls (mean age, 73.0 ± 6.3 years) were analyzed. Magnetic resonance images (MRI) from the knee joint and thigh were acquired using a 3.0 T MRI scanner. The three-dimensional moment arm was defined as the distance between the contact point of the tibiofemoral joint and the patellar tendon line. The three-dimensional moment arm was decomposed into sagittal and coronal components, which were calculated as knee extensor and valgus moment arms, respectively. Quadriceps muscle volume, epicondylar width, bisect offset, Insall-Salvati ratio, and Kellgren-Lawrence grade were assessed. Multiple regression analyses were performed in the healthy control and knee osteoarthritis groups, with knee extensor and valgus moment arms as dependent variables. FINDINGS Knee extensor moment arm was significantly associated with epicondylar width and the Insall-Salvati ratio in the healthy control group and with Kellgren-Lawrence grade, epicondylar width, and quadriceps muscle volume in the knee osteoarthritis group. Valgus knee moment arm was significantly associated with bisect offset in both the groups. INTERPRETATION Knee size, osteoarthritis severity, and quadriceps muscle volume affect the knee extensor moment arm in knee osteoarthritis, whereas lateral patellar displacement affects the valgus knee moment arms in older individuals with and without knee osteoarthritis.
Collapse
Affiliation(s)
- Masashi Taniguchi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Akihiro Asayama
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan; Department of Rehabilitation, Japanese Red Cross Nagahama Hospital, 14-7 Miyamae-cho, Nagahama, Shiga 526-8585, Japan
| | - Masahide Yagi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Yoshihiro Fukumoto
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan; Faculty of Rehabilitation, Kansai Medical University, 18-89 Uyamahigashicho, Hirakata, Osaka 573-1136, Japan
| | - Tetsuya Hirono
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Momoko Yamagata
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan; Faculty of Rehabilitation, Kansai Medical University, 18-89 Uyamahigashicho, Hirakata, Osaka 573-1136, Japan
| | - Ryusuke Nakai
- Kyoto University Institute for the Future of Human Society, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Masashi Kobayashi
- Kobayashi Orthopaedic Clinic, 50-35 Kuzetakada-cho, Minami-ku, Kyoto 601-8211, Japan
| | - Noriaki Ichihashi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| |
Collapse
|
4
|
Taniguchi M, Fukumoto Y, Yagi M, Hirono T, Yamagata M, Asayama A, Okada S, Nakai R, Kobayashi M, Ichihashi N. A higher intramuscular fat in vastus medialis is associated with functional disabilities and symptoms in early stage of knee osteoarthritis: a case-control study. Arthritis Res Ther 2023; 25:61. [PMID: 37060080 PMCID: PMC10103393 DOI: 10.1186/s13075-023-03048-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 04/07/2023] [Indexed: 04/16/2023] Open
Abstract
BACKGROUND The characteristics of muscle degeneration in individual quadriceps in early knee osteoarthritis (OA) and the association of muscle quantity and quality on knee dysfunction remain unclear. This study aimed to clarify the characteristics of muscle degeneration in individual quadriceps muscles in early knee OA and elucidate the association of muscle volume and intramuscular adipose tissue (intraMAT) with knee dysfunction, including functional disabilities, symptoms, and joint morphology. METHODS Fifty participants were categorized into early knee OA and healthy control groups. 3.0 T magnetic resonance imaging (MRI) using T1-weighted and Dixon methods and 3D SPACE in the thigh muscle and knee joint regions was performed. Quadriceps muscle volume, intraMAT, and whole-organ MRI score (WORMS) were assessed. The Knee Society Score (KSS) was used to evaluate functional disabilities and knee symptoms. Univariate analysis of variance was conducted with covariates to clarify the differences in muscle volume and intraMAT between the two groups. Multiple linear regression analyses were performed using the KSS function and symptom subcategories and WORMS as dependent variables and muscle volume, intraMAT, and the presence of early knee OA as independent variables, such as potential confounders. RESULTS The quadriceps intraMAT, especially in the vastus medialis (VM), was significantly higher in patients with early knee OA than in healthy controls. The VM intraMAT, not muscle volume, was significantly associated with KSS function [B = - 3.47; 95% confidence interval [CI], - 5.24 to - 1.71; p < 0.001] and symptom scores [B = - 0.63; 95% CI, - 1.09 to - 0.17; p = 0.008], but not with WORMS. CONCLUSION These findings suggest that higher VM intraMAT is characteristic of quadriceps muscle degeneration in early knee OA and its increase is associated with functional disabilities and symptoms.
Collapse
Affiliation(s)
- Masashi Taniguchi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53-Kawahara-Cho, Shogoin, Sakyo-Ku, Kyoto, 606-8507, Japan.
| | - Yoshihiro Fukumoto
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53-Kawahara-Cho, Shogoin, Sakyo-Ku, Kyoto, 606-8507, Japan
- Faculty of Rehabilitation, Kansai Medical University, Hirakata, Japan
| | - Masahide Yagi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53-Kawahara-Cho, Shogoin, Sakyo-Ku, Kyoto, 606-8507, Japan
| | - Tetsuya Hirono
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53-Kawahara-Cho, Shogoin, Sakyo-Ku, Kyoto, 606-8507, Japan
- School of Health and Sport Science, Chukyo University, Aichi, Japan
- Research Fellow of Japan Society for the Promotion of Science, Tokyo, Japan
| | - Momoko Yamagata
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53-Kawahara-Cho, Shogoin, Sakyo-Ku, Kyoto, 606-8507, Japan
- Faculty of Rehabilitation, Kansai Medical University, Hirakata, Japan
| | - Akihiro Asayama
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53-Kawahara-Cho, Shogoin, Sakyo-Ku, Kyoto, 606-8507, Japan
- Department of Rehabilitation, Japanese Red Cross Nagahama Hospital, Shiga, Japan
| | - Shogo Okada
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53-Kawahara-Cho, Shogoin, Sakyo-Ku, Kyoto, 606-8507, Japan
| | - Ryusuke Nakai
- Kyoto University Institute for the Future of Human Society, Kyoto, Japan
| | | | - Noriaki Ichihashi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53-Kawahara-Cho, Shogoin, Sakyo-Ku, Kyoto, 606-8507, Japan
| |
Collapse
|
5
|
Yagi M, Taniguchi M, Tateuchi H, Yamagata M, Hirono T, Asayama A, Umehara J, Nojiri S, Kobayashi M, Ichihashi N. Properties of the iliotibial band and their relationships with gait parameters among patients with knee osteoarthritis. J Orthop Res 2022; 41:1177-1185. [PMID: 36222472 DOI: 10.1002/jor.25466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 09/27/2022] [Accepted: 10/08/2022] [Indexed: 02/04/2023]
Abstract
This study aimed to determine the thickness and stiffness of the iliotibial band (ITB) in patients with knee osteoarthritis (KOA) and to identify the gait parameters that are associated with ITB properties. Eighteen female patients with radiographically diagnosed medial KOA and knee pain (age: 69.7 ± 5.9 years, body mass index: 23.0 ± 3.1 kg/m2 ) and 22 age-matched female individuals without knee pain (age: 69.1 ± 7.0 years, body mass index: 21.6 ± 3.6 kg/m2 ) were included. Shear wave elastography images were obtained at the height of the proximal pole of the patella with the participants in the supine position, and the ITB thickness and shear wave velocity, which is a surrogate measure of stiffness, were calculated. In patients with KOA, the knee and hip joint angles and moments during walking were calculated using a motion analysis system. The shear wave velocity was significantly higher in patients with KOA than in asymptomatic adults (11.3 ± 1.0 vs. 10.0 ± 1.8 m/s, respectively; p = 0.010); however, the thickness did not differ between them (2.1 ± 0.3 vs. 2.0 ± 0.3 mm, respectively; p = 0.705). The time-integral value of the knee adduction moment (β = 0.507, p = 0.032) and maximum value of the hip flexion moment (β = 0.498, p = 0.036) were associated with the shear wave velocity. Meanwhile, no parameters were associated with the thickness. The ITB was stiffer in patients with KOA than in asymptomatic adults; such a stiffer ITB was associated with greater knee adduction and hip flexion moments during walking. Clinical Significance: Greater mechanical loading was associated with a stiffer ITB in patients with KOA.
Collapse
Affiliation(s)
- Masahide Yagi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Masashi Taniguchi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Hiroshige Tateuchi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Momoko Yamagata
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan.,Faculty of Rehabilitation, Kansai Medical University, Hirakata, Osaka, Japan
| | - Tetsuya Hirono
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan.,Research Fellow of Japan Society for the Promotion of Science, Kojimachi Business Center Building, Chiyoda-ku, Tokyo, Japan.,School of Health and Sport Science, Chukyo University, Toyota, Aichi, Japan
| | - Akihiro Asayama
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Jun Umehara
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan.,Faculty of Rehabilitation, Kansai Medical University, Hirakata, Osaka, Japan
| | - Shusuke Nojiri
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | | | - Noriaki Ichihashi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| |
Collapse
|
6
|
Yamagata M, Tateuchi H, Asayama A, Ichihashi N. Influence of lower-limb muscle inactivation on medial and lateral knee contact forces during walking. Med Eng Phys 2022; 108:103889. [DOI: 10.1016/j.medengphy.2022.103889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 07/27/2022] [Accepted: 09/01/2022] [Indexed: 10/14/2022]
|
7
|
Asayama A, Tateuchi H, Yamagata M, Ichihashi N. Influence of stance width and toe direction on medial knee contact force during bodyweight squats. J Biomech 2021; 129:110824. [PMID: 34717162 DOI: 10.1016/j.jbiomech.2021.110824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 10/13/2021] [Accepted: 10/15/2021] [Indexed: 10/20/2022]
Abstract
Squats are frequently performed to strengthen the quadriceps (Quad) and gluteus maximus (GM) in sports and clinical fields. Since the squat itself produces a large knee contact force, clarifying the relationship between the squat techniques and the knee contact force is important. However, the influence of different squat techniques on the medial knee contact force (KCFmed), which would result in knee disease, remains unclear. This study aimed to investigate the influence of various squat techniques on KCFmed during bodyweight squats. Since muscle strengthening by the squat is inevitable, we additionally aimed to explore the effect of a different squat technique on the quadriceps (Quad) and gluteus maximus (GM) forces. Twelve healthy adults performed squats with different stance widths (narrow stance, NS; middle stance, MS; and wide stance, WS) and different toe directions (0° of forefoot abduction - NEUT and 30°forefoot abduction - OUT). The KCFmed, Quad force, and GM force were computed using a musculoskeletal model with marker trajectories and ground reaction forces. The KCFmed in NS was significantly larger than that in MS and WS, and KCFmed in OUT was significantly larger than that in NEUT. The Quad force in OUT was significantly larger than that in the NEUT, and the GM force significantly became larger as the stance width became narrower. These findings suggest that squats in MS and NEUT may be suitable for reducing KCFmed while maintaining the Quad and GM forces.
Collapse
Affiliation(s)
- Akihiro Asayama
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan.
| | - Hiroshige Tateuchi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan
| | - Momoko Yamagata
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan; Department of Human Development, Graduate School of Human Development and Environment, Kobe University, Japan; Research Fellow of Japan Society for the Promotion of Science Kojimachi Business Center Building, Japan
| | - Noriaki Ichihashi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan
| |
Collapse
|
8
|
Abstract
This study aimed to determine the effects of simulated hip muscle weakness on changes in hip joint forces during deep squat motion. Ten healthy individuals performed squat motion at three different positions (0° foot angle [N-squat], 10° toe-in [IN-squat], and 30° toe-out [OUT-squat]). A scaled musculoskeletal model for each participant was used to calculate the muscle and hip joint forces. For each hip muscle, models of full strength, mild muscle weakness (15% decrease), and severe muscle weakness (30% decrease) were created. The muscles affecting the hip joint forces were identified, and the rate of change in the joint forces was compared among the three squat conditions. The anterior hip joint force was increased in the muscle weakness models of the inferior gluteus maximus (iGlutMax) and iGlutMax+deep external rotator (ExtRot) muscles. With 30% muscle weakness of these muscles, statistically significant differences in the rate of increase in the anterior joint force were observed in the following order: IN-squat (iGlutMax, 29.5%; iGlutMax+ExtRot, 41.4%), N-squat (iGlutMax, 18.3%; iGlutMax+ExtRot, 27.8%), and OUT-squat (iGlutMax, 5.6%; iGlutMax+ExtRot, 9.3%). OUT-squat may be recommended to minimize the increase in hip joint forces if accompanied by hip muscle weakness.
Collapse
Affiliation(s)
- Hiroshige Tateuchi
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Momoko Yamagata
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Graduate School of Human Development and Environment, Kobe University, Hyogo, Japan.,Japan Society for the Promotion of Science, Japan
| | - Akihiro Asayama
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Noriaki Ichihashi
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| |
Collapse
|
9
|
Asayama A, Tateuchi H, Ota M, Motomura Y, Yanase K, Komamura T, Ichihashi N. Differences in shear elastic modulus of the latissimus dorsi muscle during stretching among varied trunk positions. J Biomech 2021; 118:110324. [PMID: 33618168 DOI: 10.1016/j.jbiomech.2021.110324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 11/25/2020] [Accepted: 01/31/2021] [Indexed: 11/29/2022]
Abstract
The latissimus dorsi (LD) can be divided into the upper, middle, and lower parts, but the effective stretching positions for each part are unknown. In this study, we aimed to investigate effective trunk positions for stretching of the LD. A total of 14 healthy males participated in this study. The following seven trunk positions were chosen as the LD stretching positions; upright of the trunk (Baseline), flexion of the trunk (Flex), contralateral bending of the trunk (LB), contralateral rotation of the trunk (Rot), flexion and contralateral bending of the trunk (Flex + LB), flexion and contralateral rotation of the trunk (Flex + Rot), and contralateral bending and contralateral rotation of the trunk (LB + Rot). Maximal elevation of the upper limb was passively added to all positions. The shear elastic modulus, used as the index of muscle elongation, was measured at the four parts (upper, middle, lower, distal parts) of the LD. The shear elastic moduli showed obviously high values in Rot and LB + Rot at the upper, middle, and distal parts, and also in LB, Rot, and LB + Rot at the lower part. These findings suggest that contralateral trunk rotation, or a combination of contralateral trunk bending and rotation are effective trunk positions for stretching all parts of the LD. Contralateral trunk bending was also effective for stretching the lower part of the LD.
Collapse
Affiliation(s)
- Akihiro Asayama
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan.
| | - Hiroshige Tateuchi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan
| | - Megumi Ota
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan
| | - Yoshiki Motomura
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan
| | - Ko Yanase
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan
| | | | - Noriaki Ichihashi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan
| |
Collapse
|