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Tanaka S, Inaoka PT, Madokoro S, Yamazaki T. Development of Connective Tissue Area Increases by Initial Impact With High-Intensity Exercise After Reloading in Rat Soleus Muscle. Am J Phys Med Rehabil 2023; 102:588-596. [PMID: 36730065 DOI: 10.1097/phm.0000000000002156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE The aim of the study is to clarify whether high-intensity exercise in atrophied skeletal muscle after reloading (1) increases the injury and promotes the development of the muscle connective tissue area in the soleus muscle and (2) delays muscle strength recovery. DESIGN Rats had their hindlimbs suspended for 14 days followed by hindlimb reloading and squat exercise of 30% or 70%-one-repetition maximum exercise until 14 days of reloading. The influences of reloading and exercise in muscles were examined by histological and immunofluorescence analyses based on the exercise load. RESULTS Seventy percent-one-repetition maximum exercise increased the extramyofiber area more than the control group and the central nuclear fiber number than the other groups after 7 days of reloading. Seventy percent-one-repetition maximum exercise resulted in a larger muscle connective tissue area than the control and reload groups after 14 days of reloading. Myogenin and M2-type macrophages after 7 days of reloading increased by reloading but were not increased by the exercise load. CONCLUSIONS Seventy percent-one-repetition maximum exercise to atrophied muscle increased injury early in postreloading and increased the muscle connective tissue area after 14 days of reloading, but evidence that it delays muscle strength recovery was lacking. Therefore, muscle connective tissue area induced by high-intensity exercise after reloading seems to be associated with initial exercise damage but not with repetition over 14 days.
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Affiliation(s)
- Shoji Tanaka
- From the Department of Rehabilitation, Faculty Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
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Tanaka S, Madokoro S, Inaoka PT, Yamazaki T. Blood lipid profile changes in type 2 diabetic rats after tail suspension and reloading. Lipids Health Dis 2021; 20:84. [PMID: 34334135 PMCID: PMC8327430 DOI: 10.1186/s12944-021-01511-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 07/22/2021] [Indexed: 11/10/2022] Open
Abstract
Purpose The effects of the tail suspension and reloading on the protein and lipid metabolism in muscle and blood in type 2 diabetes mellitus (T2DM) are unclear. This study evaluated the hypothesis that skeletal muscle catabolism is greater in T2DM than in non-diabetes mellitus (non-DM) rats and that the activity-dependent changes in the intramuscular lipid accumulation and blood lipid profile are poorer in T2DM than in non-DM rats. Methods T2DM and non-DM rats were suspended for two weeks followed by reloading for two weeks. The muscle and blood were then examined. Results In contrast to our hypothesis, there was no marked difference between the T2DM and non-DM groups in terms of the skeletal muscle catabolism and activity-dependent changes in intramuscular lipid accumulation. However, the blood lipid profile increased in the T2DM group compared to the non-DM group. One interesting finding in this study was the decrease in non-high-density lipoprotein (non-HDL) cholesterol levels after one week of reloading followed by a significant increase in the non-HDL cholesterol levels after two weeks of reloading in the T2DM group. Conclusion These results suggest that a dramatic increase in activity after a period of inactivity may rapidly improve the blood lipid profile in T2DM rats. Supplementary Information The online version contains supplementary material available at 10.1186/s12944-021-01511-y.
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Affiliation(s)
- Shoji Tanaka
- Department of Rehabilitation, Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 920-0942, Japan.
| | - Sachiko Madokoro
- Department of Rehabilitation, Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 920-0942, Japan
| | - Pleiades Tiharu Inaoka
- Department of Rehabilitation, Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 920-0942, Japan
| | - Toshiaki Yamazaki
- Department of Rehabilitation, Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 920-0942, Japan
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Zongxing L, Xiangwen W, Shengxian Y. The effect of sitting position changes from pedaling rehabilitation on muscle activity. Comput Methods Biomech Biomed Engin 2020; 24:260-269. [PMID: 32969744 DOI: 10.1080/10255842.2020.1823377] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Sports injuries or traffic accidents make the individuals bedridden for a long duration, easily causing the disuse of lower limb muscles. Exercise rehabilitation is an effective method to improve muscle activity; however, currently, exercise therapy mainly relies on the experience of rehabilitation physicians for determining the rehabilitation parameters. In this paper, we establish a human-machine coupling system model for disuse atrophy of lower limb muscles. We analyze the influence of sitting position on pedaling rehabilitation. The relationship between the sitting position and muscle effect of lower limb muscle is calculated. We optimized the parameters to analyze muscle force and activity distribution in the muscle group during different sitting positions, and the rehabilitation risk area and the invalid area were identified from the distribution map, which helps quantify the maximal exercise of muscles without causing secondary muscle damage. The mapping relationship between sitting position and muscle force was established in this study. Further, muscle activity mapping is performed for overall assessment. Muscle activity assessment considered the training intensity of small muscles and avoids secondary injury of small muscle. The corresponding designated sitting posture improved the intensity of muscle training and shortened the rehabilitation cycle. Systematic distribution areas for different rehabilitation effects in pedal exercises are presented and provide the sitting position distribution areas for patients in the early, middle, and late stages. The proposed model provides theoretical guidance for rehabilitation physicians.
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Affiliation(s)
- Lu Zongxing
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian, China
| | - Wei Xiangwen
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian, China
| | - You Shengxian
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian, China
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Fu S, Yin L, Lin X, Lu J, Wang X. Effects of Cyclic Mechanical Stretch on the Proliferation of L6 Myoblasts and Its Mechanisms: PI3K/Akt and MAPK Signal Pathways Regulated by IGF-1 Receptor. Int J Mol Sci 2018; 19:ijms19061649. [PMID: 29865254 PMCID: PMC6032393 DOI: 10.3390/ijms19061649] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 05/23/2018] [Accepted: 05/23/2018] [Indexed: 12/17/2022] Open
Abstract
Myoblast proliferation is crucial to skeletal muscle hypertrophy and regeneration. Our previous study indicated that mechanical stretch altered the proliferation of C2C12 myoblasts, associated with insulin growth factor 1 (IGF-1)-mediated phosphoinositide 3-kinase (PI3K)/Akt (also known as protein kinase B) and mitogen-activated protein kinase (MAPK) pathways through IGF-1 receptor (IGF-1R). The purpose of this study was to explore the same stretches on the proliferation of L6 myoblasts and its association with IGF-1-regulated PI3K/Akt and MAPK activations. L6 myoblasts were divided into three groups: control, 15% stretch, and 20% stretch. Stretches were achieved using FlexCell Strain Unit. Cell proliferation and IGF-1 concentration were detected by CCK8 and ELISA, respectively. IGF-1R expression, and expressions and activities of PI3K, Akt, and MAPKs (including extracellular signal-regulated kinases 1 and 2 (ERK1/2) and p38) were determined by Western blot. We found that 15% stretch promoted, while 20% stretch inhibited L6 myoblast proliferation. A 15% stretch increased IGF-1R level, although had no effect on IGF-1 secretion of L6 myoblasts, and PI3K/Akt and ERK1/2 (not p38) inhibitors attenuated 15% stretch-induced pro-proliferation. Exogenous IGF-1 reversed 20% stretch-induced anti-proliferation, accompanied with increases in IGF-1R level as well as PI3K/Akt and MAPK (ERK1/2 and p38) activations. In conclusion, stretch regulated L6 myoblasts proliferation, which may be mediated by the changes in PI3K/Akt and MAPK activations regulated by IGF-1R, despite no detectable IGF-1 from stretched L6 myoblasts.
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Affiliation(s)
- Shaoting Fu
- School of Kinesiology, Shanghai University of Sport, Shanghai 200438, China.
| | - Lijun Yin
- School of Kinesiology, Shanghai University of Sport, Shanghai 200438, China.
| | - Xiaojing Lin
- School of Kinesiology, Shanghai University of Sport, Shanghai 200438, China.
| | - Jianqiang Lu
- School of Kinesiology, Shanghai University of Sport, Shanghai 200438, China.
| | - Xiaohui Wang
- School of Kinesiology, Shanghai University of Sport, Shanghai 200438, China.
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Deschenes MR, McCoy RW, Mangis KA. Chronic Resistance Training Does Not Ameliorate Unloading-Induced Decrements in Neuromuscular Function. Am J Phys Med Rehabil 2017; 96:549-556. [DOI: 10.1097/phm.0000000000000681] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Petrini AC, Ramos DM, Gomes de Oliveira L, Alberto da Silva C, Pertille A. Prior swimming exercise favors muscle recovery in adult female rats after joint immobilization. J Phys Ther Sci 2016; 28:2072-7. [PMID: 27512267 PMCID: PMC4968509 DOI: 10.1589/jpts.28.2072] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 04/07/2016] [Indexed: 11/24/2022] Open
Abstract
[Purpose] To evaluate the efficacy of pre-exercise on immobilization and subsequent recovery of white gastrocnemius (WG) and soleus (SOL) muscles of female rats. [Subjects and Methods] Thirty, 8-month-old, female Wistar rats were randomly and evenly allocated to six groups: sedentary (S); immobilized sedentary (IS); immobilized/rehabilitated sedentary (IRS); trained (T); immobilized trained (IT); and immobilized/rehabilitated trained (IRT). For four months, T, IT and IRT group animals performed swimming exercise (three sessions per week, 60 minutes per session), while S, IS and IRS groups animals remained housed in cages. After this period, the left hindlimb of the animals from the IS, IRS, IT and IRT groups was immobilized for five days, with the ankle at 90°. After removal of the orthosis, animals from the IRS and IRT groups followed a rehabilitation program based on swimming (five sessions per week, 60 minutes per session) for two weeks. [Results] Immobilization significantly reduced the cross-sectional area of the white gastrocnemius muscle; no changes were observed in the soleus muscles of the trained animals. Transforming growth factor-β1 protein levels were similar among the trained groups. [Conclusion] Prior swimming prevents hypotrophy of the soleus muscle after immobilization, and protein levels reflected the adaptive capacity of the skeletal muscle.
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Affiliation(s)
- Ana Claudia Petrini
- Graduate Program in Physiotherapy, Methodist University of
Piracicaba, UNIMEP, Brazil
| | - Douglas Massoni Ramos
- Laboratory of Neuromuscular Plasticity, Graduate Program in
Science of Human Movement, Methodist University of Piracicaba, UNIMEP, Brazil
| | - Luana Gomes de Oliveira
- Laboratory of Neuromuscular Plasticity, Graduate Program in
Science of Human Movement, Methodist University of Piracicaba, UNIMEP, Brazil
| | - Carlos Alberto da Silva
- Graduate Program in Physiotherapy, Methodist University of
Piracicaba, UNIMEP, Brazil
- Laboratory of Neuromuscular Plasticity, Graduate Program in
Science of Human Movement, Methodist University of Piracicaba, UNIMEP, Brazil
| | - Adriana Pertille
- Graduate Program in Physiotherapy, Methodist University of
Piracicaba, UNIMEP, Brazil
- Laboratory of Neuromuscular Plasticity, Graduate Program in
Science of Human Movement, Methodist University of Piracicaba, UNIMEP, Brazil
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Ojeda ÁH, Ríos LC, Barrilao RG, Ríos IC, Serrano PC. Effect of two complex training protocols of back squats in blood indicators of muscular damage in military athletes. J Phys Ther Sci 2016; 28:1487-92. [PMID: 27313356 PMCID: PMC4905895 DOI: 10.1589/jpts.28.1487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 02/01/2016] [Indexed: 11/24/2022] Open
Abstract
[Purpose] The aim of this study was to determine the variations in the blood muscular
damage indicators post application of two complex training programs for back squats.
[Subjects and Methods] Seven military athletes were the subjects of this study. The study
had a quasi-experimental cross-over intra-subject design. Two complex training protocols
were applied, and the variables to be measured were cortisol, metabolic creatine kinase,
and total creatine kinase. For the statistical analysis, Student’s t-test was used.
[Results] Twenty-four hours post effort, a significant decrease in cortisol level was
shown for both protocols; however, the metabolic creatine kinase and total creatine kinase
levels showed a significant increase. [Conclusion] Both protocols lowered the indicator of
main muscular damage in the blood supply (cortisol). This proved that the work weight did
not generate significant muscular damage in the 24-hour post-exercise period.
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Affiliation(s)
- Álvaro Huerta Ojeda
- Facultad de Educación, Universidad de las Américas, Chile; Department of Physical Education and Sport, Universidad de Granada, Spain; Facultad de Ciencias del Deporte, Universidad de Granada, Spain
| | - Luis Chirosa Ríos
- Department of Physical Education and Sport, Universidad de Granada, Spain; Facultad de Ciencias del Deporte, Universidad de Granada, Spain
| | - Rafael Guisado Barrilao
- Facultad de Ciencias del Deporte, Universidad de Granada, Spain; Department of Nursing, Universidad de Granada, Spain
| | - Ignacio Chirosa Ríos
- Department of Physical Education and Sport, Universidad de Granada, Spain; Facultad de Ciencias del Deporte, Universidad de Granada, Spain
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