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Rodríguez-Benítez E, López-García K, Xelhuantzi N, Corona-Quintanilla DL, Castelán F, Martínez-Gómez M. Shift from Pro- to Anti-Inflammatory Phase in Pelvic Floor Muscles at Postpartum Matches Histological Signs of Regeneration in Multiparous Rabbits. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:675. [PMID: 38674321 PMCID: PMC11052351 DOI: 10.3390/medicina60040675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 03/31/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024]
Abstract
Background and Objectives: Pelvic floor muscles (PFM) play a core role in defecation and micturition. Weakening of PFM underlies urogynecological disorders such as pelvic organ prolapse and stress urinary incontinence. Vaginal delivery damages PFM. Muscle trauma implies an inflammatory response mediated by myeloid cells, essential for subsequent recovery. Molecular signaling characterizing the pro-inflammatory phase shifts M1 macrophages to M2 macrophages, which modulate muscle repair. The present study aimed to evaluate histological characteristics and the presence of M1 and M2 macrophages in bulbospongiosus (Bsm) and pubococcygeus muscles (Pcm). Materials and Methods: Muscles from young nulliparous (N) and multiparous rabbits on postpartum days three (M3) and twenty (M20) were excised and histologically processed to measure the myofiber cross-sectional area (CSA) and count the centralized myonuclei in hematoxylin-eosinstained sections. Using immunohistochemistry, M1 and M2 macrophages were estimated in muscle sections. Kruskal-Wallis or one-way ANOVA testing, followed by post hoc tests, were conducted to identify significant differences (p < 0.05). Results: The myofiber CSA of both the Bsm and Pcm of the M3 group were more extensive than those of the N and M20 groups. Centralized myonuclei estimated in sections from both muscles of M20 rabbits were higher than those of N rabbits. Such histological outcomes matched significant increases in HLA-DR immunostaining in M3 rabbits with the CD206 immunostaining in muscle sections from M20 rabbits. Conclusions: A shift from the pro- to anti-inflammatory phase in the bulbospongiosus and pubococcygeus muscles of multiparous rabbits matches with centralized myonuclei, suggesting the ongoing regeneration of muscles.
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Affiliation(s)
- Esteban Rodríguez-Benítez
- Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala 90070, Mexico; (E.R.-B.); (D.L.C.-Q.); (F.C.)
- Doctorado en Ciencias Biológicas, Universidad Autónoma de Tlaxcala, Tlaxcala 90070, Mexico;
| | - Kenia López-García
- Doctorado en Ciencias Biológicas, Universidad Autónoma de Tlaxcala, Tlaxcala 90070, Mexico;
| | - Nicte Xelhuantzi
- Facultad de Ciencias de la Salud, Universidad Autónoma de Tlaxcala, Zacatelco 90750, Mexico;
| | - Dora Luz Corona-Quintanilla
- Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala 90070, Mexico; (E.R.-B.); (D.L.C.-Q.); (F.C.)
| | - Francisco Castelán
- Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala 90070, Mexico; (E.R.-B.); (D.L.C.-Q.); (F.C.)
- Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Carretera Federal Tlaxcala-Puebla km 1.5 s/n, Tlaxcala 90070, Mexico
| | - Margarita Martínez-Gómez
- Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala 90070, Mexico; (E.R.-B.); (D.L.C.-Q.); (F.C.)
- Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Carretera Federal Tlaxcala-Puebla km 1.5 s/n, Tlaxcala 90070, Mexico
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2
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Tsurukami H, Itoigawa Y, Uehara H, Hatae F, Kubota A, Mizuno M, Maezawa K, Takazawa Y, Ishijima M. Stiffness Changes in Shoulder Muscles between Pitchers and Position Players after Throwing Overhead Using Shear Wave Elastography and Throwing Motion Analysis. J Clin Med 2024; 13:2056. [PMID: 38610821 PMCID: PMC11012453 DOI: 10.3390/jcm13072056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/16/2024] [Accepted: 03/30/2024] [Indexed: 04/14/2024] Open
Abstract
Objectives: The objective is to compare stiffness changes around the shoulder muscles between pitchers and position players after throwing overhead using shear wave elastography (SWE) in relation to throwing motion analysis and muscle strength. Methods: A total of 32 male college baseball players (12 pitchers and 20 position players) were observed throwing 20 times, and SWE was performed to evaluate 13 shoulder muscle items-tendons (supraspinatus, infraspinatus, subscapularis, and teres minor), muscles (supraspinatus, infraspinatus [transverse and oblique part], teres minor, lower trapezius, latissimus dorsi, and pectoralis minor), and capsules (posterior and posteroinferior). Motion analysis was used to assess elbow torque, forearm angle, forearm rotation speed, and maximum external rotation angle of the shoulder. Muscle strength was measured using a dynamometer for abduction, internal/external rotation of the shoulder at an abduction of 0°, internal/external rotation of the shoulder at an abduction of 90°, and internal/external rotation of shoulder at a flexion of 90°. Results: In the pitcher group, SWE values for the teres minor muscle and latissimus dorsi muscle increased significantly after throwing. In the position player group, SWE values for the teres minor muscle significantly increased, and SWE values of the pectoralis minor muscle decreased after throwing. In the pitcher group, positive correlations were found between the teres minor muscle and forearm rotation speed and between the latissimus dorsi muscle and forearm angle. No significant difference was found in muscle strength after throwing in any of the groups. Conclusions: Stiffness changes occurred after throwing and were related to the motion analysis, but the regions in which stiffness occurred varied between pitchers and position players.
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Affiliation(s)
- Hironori Tsurukami
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Urayasu 279-0021, Japan; (H.T.); (F.H.); (K.M.)
- Department of Orthopaedic Surgery, Faculty of Medicine, Juntendo University, Hongo, Tokyo 113-0034, Japan; (H.U.); (M.I.)
| | - Yoshiaki Itoigawa
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Urayasu 279-0021, Japan; (H.T.); (F.H.); (K.M.)
- Department of Orthopaedic Surgery, Faculty of Medicine, Juntendo University, Hongo, Tokyo 113-0034, Japan; (H.U.); (M.I.)
| | - Hirohisa Uehara
- Department of Orthopaedic Surgery, Faculty of Medicine, Juntendo University, Hongo, Tokyo 113-0034, Japan; (H.U.); (M.I.)
| | - Fumitoshi Hatae
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Urayasu 279-0021, Japan; (H.T.); (F.H.); (K.M.)
- Department of Orthopaedic Surgery, Faculty of Medicine, Juntendo University, Hongo, Tokyo 113-0034, Japan; (H.U.); (M.I.)
| | - Atsushi Kubota
- Graduate School of Health and Sports Science, Juntendo University, Inzai 270-1695, Japan; (A.K.); (M.M.); (Y.T.)
- Department of Sports Medicine, Faculty of Medicine, Juntendo University, Hongo, Tokyo 113-0034, Japan
| | - Motoki Mizuno
- Graduate School of Health and Sports Science, Juntendo University, Inzai 270-1695, Japan; (A.K.); (M.M.); (Y.T.)
| | - Katsuhiko Maezawa
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Urayasu 279-0021, Japan; (H.T.); (F.H.); (K.M.)
| | - Yuuji Takazawa
- Graduate School of Health and Sports Science, Juntendo University, Inzai 270-1695, Japan; (A.K.); (M.M.); (Y.T.)
- Department of Sports Medicine, Faculty of Medicine, Juntendo University, Hongo, Tokyo 113-0034, Japan
| | - Muneaki Ishijima
- Department of Orthopaedic Surgery, Faculty of Medicine, Juntendo University, Hongo, Tokyo 113-0034, Japan; (H.U.); (M.I.)
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3
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Mitsuya H, Nakazato K, Hakkaku T, Okada T. Hip flexion angle affects longitudinal muscle activity of the rectus femoris in leg extension exercise. Eur J Appl Physiol 2023; 123:1299-1309. [PMID: 36795130 DOI: 10.1007/s00421-023-05156-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 02/08/2023] [Indexed: 02/17/2023]
Abstract
PURPOSE We investigated the effect of the hip flexion angle (HFA) on the longitudinal muscle activity of the rectus femoris (RF) during leg extension exercise (LEE). METHODS We conducted an acute study in a specific population. Nine male bodybuilders performed isotonic LEE using a leg extension machine at three different HFAs: 0°, 40°, and 80°. Participants extended their knees from 90° to 0° at each HFA setting for four sets of ten repetitions at 70% of the one-repetition maximum. The transverse relaxation time (T2) of the RF was measured before and after LEE using magnetic resonance imaging. We analyzed the rate of change in the T2 value in the proximal, middle, and distal regions of the RF. The subjective sensation of muscle contraction of the quadriceps was measured using a numerical rating scale (NRS) and compared with the T2 value which was the objective index. RESULTS At 80°, the T2 value in the middle RF was lower than that in the distal RF (p < 0.05). The T2 values at 0° and 40° HFA were higher than those at 80° HFA in the proximal (p < 0.05, p < 0.01) and middle RF (p < 0.01, p < 0.01). The NRS scores were inconsistent with the objective index. CONCLUSION These results suggest that the 40° HFA is practical for region-specific strengthening of the proximal RF, and subjective sensation alone as an indication of training may not activate the proximal RF. We conclude that activation of each longitudinal section of the RF is possible depending on the hip joint angle.
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Affiliation(s)
- Hiroku Mitsuya
- Graduate School of Health and Sport Science, Nippon Sport Science University, 7-1-1 Fukasawa, Setagaya-ku, Tokyo, Japan.
| | - Koichi Nakazato
- Graduate School of Health and Sport Science, Nippon Sport Science University, 7-1-1 Fukasawa, Setagaya-ku, Tokyo, Japan
| | - Takayoshi Hakkaku
- Graduate School of Health and Sport Science, Nippon Sport Science University, 7-1-1 Fukasawa, Setagaya-ku, Tokyo, Japan
| | - Takashi Okada
- Graduate School of Health and Sport Science, Nippon Sport Science University, 7-1-1 Fukasawa, Setagaya-ku, Tokyo, Japan
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Rai A, Bhati P, Anand P. Exercise induced muscle damage and repeated bout effect: an update for last 10 years and future perspectives. COMPARATIVE EXERCISE PHYSIOLOGY 2022. [DOI: 10.3920/cep220025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Exercise-induced muscle damage (EIMD) and repeated bout effect (RBE) are widely researched across various populations. EIMD is the muscle damage occurring after one bout of unaccustomed exercise while RBE is the attenuation of the same muscle damage in subsequent second bout. RBE seems to have significant implications for exercise prescription. Despite existence of vast literature, there is lack of clarity on the effects of EIMD and RBE in a healthy population. The purpose of this study is to review the literature on EIMD and RBE in healthy participants published during the last 10 years. The search of major databases (including Scopus, Google Scholar and PubMed) was conducted using specific keywords ‘Exercise induced muscle damage’, ‘Repeated bout effect’, ‘Healthy participants’ ‘Pre-conditioning’, ‘Eccentric exercise’. Studies published from 2011 onwards which included EIMD and RBE assessment in healthy participants were included in this review. Database searching revealed a total of 38 studies on EIMD and RBE in healthy participants. Three major themes of papers were identified that focused on EIMD and RBE along with (1) age related differences, (2) sex-based differences, and (3) response in athletes. Findings of this comprehensive review suggests that both EIMD and RBE are age, and sex specific. Delayed onset muscle soreness played a major role in both EIMD and RBE in all the population types. Female participants are less susceptible to EIMD as compared to age-matched male counterparts. Moreover, both EIMD and RBE are more elicited in middle aged and younger adults as compared to children and older adults while the magnitude of RBE turns out to be minimal in trained individuals due to persisting adaptations.
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Affiliation(s)
- A. Rai
- Faculty of Physiotherapy, Shree Guru Gobind Singh Tricentenary University, Gurugram, Haryana, India
| | - P. Bhati
- Faculty of Physiotherapy, Shree Guru Gobind Singh Tricentenary University, Gurugram, Haryana, India
| | - P. Anand
- Faculty of Physiotherapy, Shree Guru Gobind Singh Tricentenary University, Gurugram, Haryana, India
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5
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Ličen U, Kozinc Ž. Using Shear-Wave Elastography to Assess Exercise-Induced Muscle Damage: A Review. SENSORS (BASEL, SWITZERLAND) 2022; 22:7574. [PMID: 36236672 PMCID: PMC9571996 DOI: 10.3390/s22197574] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 09/21/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
Shear-wave elastography is a method that is increasingly used to assess muscle stiffness in clinical practice and human health research. Recently, shear-wave elastography has been suggested and used to assess exercise-induced muscle damage. This review aimed to summarize the current knowledge of the utility of shear-wave elastography for assessment of muscle damage. In general, the literature supports the shear-wave elastography as a promising method for assessment of muscle damage. Increases in shear modulus are reported immediately and up to several days after eccentric exercise, while studies using shear-wave elastography during and after endurance events are showing mixed results. Moreover, it seems that shear modulus increases are related to the decline in voluntary strength loss. We recommend that shear modulus is measured at multiple muscles within a muscle group and preferably at longer muscle lengths. While further studies are needed to confirm this, the disruption of calcium homeostasis seems to be the primary candidate for the underlying mechanism explaining the increases in shear modulus observed after eccentric exercise. It remains to be investigated how well the changes in shear modulus correlate with directly assessed amount of muscle damage (biopsy).
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Affiliation(s)
- Urška Ličen
- Faculty of Health Sciences, University of Primorska, Polje 42, 6310 Izola, Slovenia
| | - Žiga Kozinc
- Faculty of Health Sciences, University of Primorska, Polje 42, 6310 Izola, Slovenia
- Andrej Marušič Institute, University of Primorska, Muzejski trg 2, 6000 Koper, Slovenia
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6
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Kawama R, Yanase K, Hojo T, Wakahara T. Acute changes in passive stiffness of the individual hamstring muscles induced by resistance exercise: effects of contraction mode and range of motion. Eur J Appl Physiol 2022; 122:2071-2083. [PMID: 35699758 DOI: 10.1007/s00421-022-04976-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 05/27/2022] [Indexed: 11/27/2022]
Abstract
PURPOSE Recent studies raise an interesting possibility that resistance exercise also decreases passive muscle stiffness, as does stretching exercise. However, little is known about how program variables of resistance exercise acutely influence muscle stiffness. We aimed to examine the acute changes in passive stiffness of the individual hamstring muscles after resistance exercises using different combinations of contraction modes and ranges of motion (ROMs). METHODS Thirteen healthy young male participants performed three sessions of resistance exercises that comprised stiff-leg deadlift with different contraction modes and exercise ROMs on separate days as follows: (1) eccentric contractions with a wide exercise ROM (EW); (2) eccentric contractions with a narrow exercise ROM (EN); and (3) concentric contractions with a wide exercise ROM (CW). Maximal joint ROM, passive torque, shear modulus of the individual hamstring muscles, and maximal isometric torque of knee flexion were measured before and 3 min, 30 min, and 60 min after completing each session. RESULTS The shear modulus of the semimembranosus was significantly lower at 3 min post-exercise (121.8 ± 16.0 kPa) than at pre-exercise (129.0 ± 18.9 kPa, p = 0.021, r = 0.45) in EW, but not in EN or CW. There were no significant changes in the shear moduli of the biceps femoris long head or the semitendinosus at any timepoint in any exercise protocols. CONCLUSIONS The present results suggest that the combination of eccentric contraction and wide ROM during resistance exercise has the potential to acutely decrease passive stiffness (shear modulus) of a specific muscle.
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Affiliation(s)
- Raki Kawama
- Graduate School of Health and Sports Science, Doshisha University, Kyoto, Japan.,Research Fellow of Japan Society for the Promotion of Science, Tokyo, Japan
| | - Ko Yanase
- Faculty of Health and Sports Science, Doshisha University, Kyoto, Japan.,Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Tatsuya Hojo
- Graduate School of Health and Sports Science, Doshisha University, Kyoto, Japan.,Faculty of Health and Sports Science, Doshisha University, Kyoto, Japan
| | - Taku Wakahara
- Faculty of Health and Sports Science, Doshisha University, Kyoto, Japan. .,Human Performance Laboratory, Waseda University, Saitama, Japan.
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Chalchat E, Siracusa J, Bourrilhon C, Charlot K, Martin V, Garcia-Vicencio S. Muscle Shear Elastic Modulus Provides an Indication of the Protection Conferred by the Repeated Bout Effect. Front Physiol 2022; 13:877485. [PMID: 35574495 PMCID: PMC9098813 DOI: 10.3389/fphys.2022.877485] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 03/08/2022] [Indexed: 11/13/2022] Open
Abstract
Background: The neuromuscular system is able to quickly adapt to exercise-induced muscle damage (EIMD), such that it is less affected by subsequent damaging exercise, a phenomenon known as the repeated bout effect (RBE). The objective was to determine whether the mechanical properties of the quadriceps, as evaluated by shear wave elastography (SWE), were less affected when a second bout of eccentric-biased exercise was performed 2 weeks later. It was hypothesized that the first bout would confer protection against extensive muscle damage through an adaptation of the muscle stiffness before the second bout (i.e., higher muscle stiffness).Methods: Sixteen males performed two identical bouts of downhill walking separated by 2 weeks (45 min at 4.5 km.h−1; gradient: 25%; load: 30% of the body mass). Rectus femoris (RF) and vastus lateralis (VL) resting shear elastic modulus (µ) and EIMD symptoms were measured before and up to 7 days following the exercise bouts. Changes in neuromuscular function was evaluated by maximal voluntary contraction torque, voluntary activation level, evoked mechanical response to single and double (10 and 100 Hz doublets) electrical stimulation. An index of protection (IP) was calculated for EIMD symptoms to assess magnitude the RBE.Results: EIMD symptoms were less affected after the second than the first exercise bout. RF and VL-µ increased (p < 0.001) only after the first exercise. RF µ was elevated up to 2 weeks after the end of the first exercise (p < 0.001) whereas VL µ was only increased up to 24 h. The increase in µ observed 2 weeks after the end of the first exercise was correlated with the IP; i.e., attenuation of alterations in muscle µ, 10 Hz-doublet amplitude and rate of torque development after the second exercise bout (p < 0.05).Conclusion: We showed that muscle µ assessed by SWE was sensitive to the RBE, with a differential effect between VL and RF. The persistent increase in µ was associated with the attenuation of neuromuscular impairments observed after the second bout, suggesting that the increased muscle stiffness could be a “protective” adaptation making muscles more resistant to the mechanical strain associated to eccentric contractions.
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Affiliation(s)
- Emeric Chalchat
- Institut de Recherche Biomédicale des Armées, Unité de Physiologie des Exercices et Activités en Conditions Extrêmes, Département Environnements Opérationnels, Bretigny-Sur-Orge, France
- AME2P, Université Clermont Auvergne, Clermont-Ferrand, France
- *Correspondence: Emeric Chalchat,
| | - Julien Siracusa
- Institut de Recherche Biomédicale des Armées, Unité de Physiologie des Exercices et Activités en Conditions Extrêmes, Département Environnements Opérationnels, Bretigny-Sur-Orge, France
- LBEPS, Univ Evry, IRBA, Université Paris Saclay, Evry, France
| | - Cyprien Bourrilhon
- Institut de Recherche Biomédicale des Armées, Unité de Physiologie des Exercices et Activités en Conditions Extrêmes, Département Environnements Opérationnels, Bretigny-Sur-Orge, France
- LBEPS, Univ Evry, IRBA, Université Paris Saclay, Evry, France
| | - Keyne Charlot
- Institut de Recherche Biomédicale des Armées, Unité de Physiologie des Exercices et Activités en Conditions Extrêmes, Département Environnements Opérationnels, Bretigny-Sur-Orge, France
- LBEPS, Univ Evry, IRBA, Université Paris Saclay, Evry, France
| | - Vincent Martin
- AME2P, Université Clermont Auvergne, Clermont-Ferrand, France
- Institut Universitaire de France (IUF), Paris, France
| | - Sebastian Garcia-Vicencio
- Institut de Recherche Biomédicale des Armées, Unité de Physiologie des Exercices et Activités en Conditions Extrêmes, Département Environnements Opérationnels, Bretigny-Sur-Orge, France
- LBEPS, Univ Evry, IRBA, Université Paris Saclay, Evry, France
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8
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Kasahara K, Yoshida R, Yahata K, Sato S, Murakami Y, Aizawa K, Konrad A, Nakamura M. Comparison of the Acute Effects of Foam Rolling with High and Low Vibration Frequencies on Eccentrically Damaged Muscle. J Sports Sci Med 2022; 21:112-119. [PMID: 35250340 DOI: 10.52082/jssm.2022.112] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 01/13/2022] [Indexed: 12/24/2022]
Abstract
Previous research has shown that vibration foam rolling (VFR) on damaged muscle shows greater improvement in muscle soreness and range of motion (ROM) compared with foam rolling (FR) without vibration. However, the effect of frequency in VFR on muscle soreness and loss of function caused by damaged muscles is unknown. The purpose of this study was to compare the acute effects of 90-s low-frequency (LF)- and high-frequency (HF)-VFR intervention on ROM, muscle soreness, muscle strength, and performance of eccentrically damaged muscle. Study participants were sedentary healthy adult volunteers (n = 28) who performed a bout of eccentric exercise of the knee extensors with the dominant leg and received 90-s LF-VFR or HF-VFR intervention of the quadriceps 48 h after the eccentric exercise. The dependent variables were measured before the eccentric exercise (baseline) and before (pre-intervention) and after VFR intervention (post-intervention) 48 h after the eccentric exercise. The results showed that both LF-VFR and HF-VFR similarly (p < 0.05) improved the knee flexion ROM (11.3 ± 7.2%), muscle soreness at palpation (-37.9 ± 17.2%), and countermovement jump height (12.4 ± 12.9%). It was concluded that it was not necessary to perform VFR with a high frequency to improve muscle soreness and function.
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Affiliation(s)
- Kazuki Kasahara
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan
| | - Riku Yoshida
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Kaoru Yahata
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Shigeru Sato
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan.,Department of Rehabilitation, Matsumura General Hospital 1-1 Kotaroumachi, Taira, Iwaki City, Fukushima, Japan
| | - Yuta Murakami
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan
| | - Kodai Aizawa
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan
| | - Andreas Konrad
- Institute of Human Movement Science, Sport and Health, Graz University, Graz, Austria
| | - Masatoshi Nakamura
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan.,Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
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9
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Oliveria SND, Biduski GM, Moro ARP, Freitas CDLR. Muscle architecture of the vastus lateralis and rectus femoris in the production of knee extensor torque in physically inactive women. MOTRIZ: REVISTA DE EDUCACAO FISICA 2022. [DOI: 10.1590/s1980-657420220006422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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10
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Shoji M, Ema R, Nosaka K, Kanda A, Hirata K, Akagi R. Muscle Damage Indicated by Maximal Voluntary Contraction Strength Changes From Immediately to 1 Day After Eccentric Exercise of the Knee Extensors. Front Physiol 2021; 12:775157. [PMID: 34867482 PMCID: PMC8635727 DOI: 10.3389/fphys.2021.775157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 10/25/2021] [Indexed: 11/13/2022] Open
Abstract
The present study examined if the magnitude of changes in indirect muscle damage markers could be predicted by maximal voluntary isometric contraction (MVIC) torque changes from immediately to 1 day after eccentric exercise. Twenty-eight young men performed 100 maximal isokinetic (60°/s) eccentric contractions of the knee extensors. MVIC torque, potentiated doublet torque, voluntary activation (VA) during MVIC, shear modulus of rectus femoris (RF), vastus medialis and lateralis, and muscle soreness of these muscles were measured before, immediately after, and 1–3 days post-exercise. Based on the recovery rate of the MVIC torque from immediately to 1-day post-exercise, the participants were placed to a recovery group that showed an increase in the MVIC torque (11.3–79.9%, n = 15) or a no-recovery group that showed no recovery (−71.9 to 0%, n = 13). No significant difference in MVIC torque decrease immediately post-exercise was found between the recovery (−33 ± 12%) and no-recovery (−32 ± 9%) groups. At 1–3 days, changes in MVIC torque (−40 to −26% vs. −22 to −12%), potentiated doublet torque (−37 to −22% vs. −20 to −9%), and proximal RF shear modulus (29–34% vs. 8–15%) were greater (p < 0.05) for the no-recovery than recovery group. No significant group differences were found for muscle soreness. The recovery rate of MVIC torque was correlated (p < 0.05) with the change in MVIC torque from baseline to 2 (r = 0.624) or 3 days post-exercise (r = 0.526), or peak change in potentiated doublet torque at 1–3 days post-exercise from baseline (r = 0.691), but not correlated with the changes in other dependent variables. These results suggest that the recovery rate of MVIC torque predicts changes in neuromuscular function but not muscle soreness and stiffness following eccentric exercise of the knee extensors.
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Affiliation(s)
- Mikio Shoji
- Graduate School of Engineering and Science, Shibaura Institute of Technology, Saitama, Japan
| | - Ryoichi Ema
- Faculty of Sport Science, Shizuoka Sangyo University, Iwata-shi, Japan
| | - Kazunori Nosaka
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Akihiro Kanda
- Graduate School of Engineering and Science, Shibaura Institute of Technology, Saitama, Japan.,Mizuno Corporation, Osaka, Japan
| | - Kosuke Hirata
- Faculty of Sport Sciences, Waseda University, Tokorozawa-shi, Japan
| | - Ryota Akagi
- Graduate School of Engineering and Science, Shibaura Institute of Technology, Saitama, Japan.,College of Systems Engineering and Science, Shibaura Institute of Technology, Saitama, Japan
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Ema R, Nosaka K, Kawashima R, Kanda A, Ikeda K, Akagi R. Muscle length influence on rectus femoris damage and protective effect in knee extensor eccentric exercise. Scand J Med Sci Sports 2020; 31:597-609. [PMID: 33249658 PMCID: PMC7986188 DOI: 10.1111/sms.13890] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/31/2020] [Accepted: 11/24/2020] [Indexed: 01/18/2023]
Abstract
This study tested the hypothesis that the magnitude of rectus femoris (RF) damage and the repeated bout effect (RBE) would be greater after knee extensor eccentric exercise performed in a supine (long RF lengths) than a sitting (short RF lengths) position, and the muscle length effects would be more prominent at the proximal than distal RF. Young untrained men were placed to one of the two groups (n = 14 per group). S group performed the knee extensor eccentric exercise in the sitting position for the first bout and the supine position for the second bout, and L group performed the exercise in the supine position for two bouts, with 4 weeks between bouts. Dependent variables included evoked and maximal voluntary isometric contraction (MVC) torque, electromyography (EMG) during MVC, muscle soreness, and shear modulus, which were measured before and 1‐3 days after each exercise bout. After the first bout, L group in comparison with S group showed greater (P < .05) changes in hip flexor MVC torque (average of 1‐3 days post‐exercise: −11.1 ± 9.4% vs −5.0 ± 7.5%), proximal RF EMG (−22.4 ± 16% vs −9.0 ± 21.9%), and proximal RF shear modulus (33.2 ± 22.8% vs 16.9 ± 13.5%). No significant differences between groups were evident for any of other variables after the first bout including knee extensor MVC torque, and for the changes in all variables after the second bout. These results supported the hypothesis that RF damage would be greater for the spine than sitting position especially at the proximal region, but did not support the hypothesis about the RBE.
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Affiliation(s)
- Ryoichi Ema
- School of Management, Shizuoka Sangyo University, Iwata, Japan
| | - Kazunori Nosaka
- School of Medical and Health Sciences, Centre for Exercise and Sports Science Research, Edith Cowan University, Joondalup, WA, Australia
| | - Ryosuke Kawashima
- College of Systems Engineering and Science, Shibaura Institute of Technology, Saitama, Japan
| | - Akihiro Kanda
- Graduate School of Engineering and Science, Shibaura Institute of Technology, Saitama, Japan.,Mizuno Corporation, Osaka, Japan
| | - Koya Ikeda
- College of Systems Engineering and Science, Shibaura Institute of Technology, Saitama, Japan
| | - Ryota Akagi
- College of Systems Engineering and Science, Shibaura Institute of Technology, Saitama, Japan.,Graduate School of Engineering and Science, Shibaura Institute of Technology, Saitama, Japan
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