1
|
Matsuo S, Iwata M, Miyazaki M, Fukaya T, Yamanaka E, Nagata K, Tsuchida W, Asai Y, Suzuki S. Acute and Prolonged Effects of 300 sec of Static, Dynamic, and Combined Stretching on Flexibility and Muscle Force. J Sports Sci Med 2023; 22:626-636. [PMID: 38045743 PMCID: PMC10690505 DOI: 10.52082/jssm.2023.626] [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] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 09/25/2023] [Indexed: 12/05/2023]
Abstract
Static stretching (SS), dynamic stretching (DS), and combined stretching (CS; i.e., DS+SS) are commonly performed as warm-up exercises. However, the stretching method with the greatest effect on flexibility and performance remains unclear. This randomized crossover trial examined acute and prolonged effects of SS, DS, and CS on range of motion (ROM), peak passive torque (PPT), passive stiffness, and isometric and concentric muscle forces. Twenty healthy young men performed 300 sec of active SS, DS, or CS (150-sec SS followed by 150-sec DS and 150-sec DS followed by 150-sec SS) of the right knee flexors on four separate days, in random order. Subsequently, we measured ROM, PPT, and passive stiffness during passive knee extension. We also measured maximum voluntary isometric and concentric knee flexion forces and surface electromyographic activities during force measurements immediately before, immediately after, and 20 and 60 min after stretching. All stretching methods significantly increased ROM and PPT, while significantly decreasing isometric knee flexion force (all p < 0.05). These changes lasted 60 min after all stretching methods; the increases in ROM and PPT and the decreases in isometric muscle force were similar. All stretching methods also significantly decreased passive stiffness immediately after stretching (all p < 0.05). Decreases in passive stiffness tended to be longer after CS than after SS or DS. Concentric muscle force was decreased after SS and CS (all p < 0.05). On the other hand, concentric muscle force was unchanged after DS, while the decreases in surface electromyographic activities during concentric force measurements after all stretching methods were similar. Our results suggest that 300 sec of SS, DS, and CS have different acute and prolonged effects on flexibility and muscle force.
Collapse
Affiliation(s)
- Shingo Matsuo
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Masahiro Iwata
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Manabu Miyazaki
- Department of Physical Therapy, Faculty of Medical Science for Health, Teikyo Heisei University, Tokyo, Japan
| | - Taizan Fukaya
- Department of Physical Therapy, Faculty of Social Work Studies, Josai International University, Togane, Japan
| | - Eiji Yamanaka
- Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, Narashino, Japan
| | - Kentaro Nagata
- Department of International Affairs, Project Division, Japanese Physical Therapy Association, Tokyo, Japan
| | - Wakako Tsuchida
- Health and Medical Research Institute, Department of Life Science and Biotechnology, National Institute of Advanced Industrial Science and Technology (AIST), Kagawa, Japan
| | - Yuji Asai
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Shigeyuki Suzuki
- Department of Health and Sports Sciences, School of Health Sciences, Asahi University, Mizuho, Japan
| |
Collapse
|
2
|
Wilken B, Zaman M, Asai Y. Patient education in atopic dermatitis: a scoping review. Allergy Asthma Clin Immunol 2023; 19:89. [PMID: 37833754 PMCID: PMC10576377 DOI: 10.1186/s13223-023-00844-w] [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] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 09/21/2023] [Indexed: 10/15/2023]
Abstract
BACKGROUND Atopic dermatitis (AD) is a chronic inflammatory skin disease that affects children and adults. Poor treatment adherence in AD requires interventions to promote self-management; patient education in chronic diseases is key to self-management. Many international AD management guidelines published to date include a recommendation for educating patients as part of their treatment but there are no formal recommendations on how to deliver this knowledge. MAIN: We performed a scoping review to map the existing literature on patient education practices in AD and to highlight the clinical need for improved patient education in AD. The literature search was performed with the online databases MEDLINE, Embase, Grey Matters, ClinicalTrails.gov and the International Clinical Trials Registry Platform (ICTRP). The search strategy yielded 388 articles. Of the 388 articles screened, 16 studies met the eligibility criteria, and the quantitative data was summarized by narrative synthesis. The majority of studies were randomized controlled trials conducted in Europe, Asia and North America. Since 2002, there have been limited studies evaluating patient education in the treatment of AD. Frequent education methods used included group-based educational programs, educational pamphlets, individual consultations and online resources. Education was most commonly directed at caregivers and their children. Only one study compared the efficacy of different education methods. In all included studies, the heterogenous nature of outcome measures and study design limited the consistency of results. Despite the heterogeneity of studies, patient education was shown to improve quality of life (QoL), disease severity and psychological outcomes in AD patients. CONCLUSION This scoping review highlights that patient education is effective in a variety of domains relevant to AD treatment. Further comparative studies and randomized trials with longer-term follow-up are needed to provide validated and consistent patient education recommendations for AD; these may depend on age and population.
Collapse
Affiliation(s)
- Bethany Wilken
- Translational Institute of Medicine, Department of Medicine, Queen's University, Kingston, ON, Canada.
| | - M Zaman
- School of Medicine, Queen's University, Kingston, ON, Canada
| | - Y Asai
- Division of Dermatology, Department of Medicine, Queen's University, Kingston, ON, Canada
| |
Collapse
|
3
|
Nishikubo T, Tsujii N, Kajimoto T, Ohara A, Asai Y, Ueda T, Takeda M, Tanaka K, Fukushima H, Watanabe M, Nogami K. The First Case in Japan of Fulminant Myocarditis Due to Multisystem Inflammatory Syndrome in Children (MIS-C) That Required Mechanical Circulatory Support. Int Heart J 2023; 64:783-788. [PMID: 37518359 DOI: 10.1536/ihj.23-116] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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] [Indexed: 08/01/2023]
Abstract
Multisystem inflammatory syndrome in children (MIS-C) is a novel hyperinflammatory syndrome that is associated with severe acute respiratory syndrome coronavirus 2 infections. Reports describing the mechanical circulatory support (MCS) and myocardial biopsy for fulminant myocarditis due to MIS-C are limited.A 13-year-old male patient with MIS-C underwent treatment, including immunosuppressive therapy and MCS devices, and managed to recover from pulseless electrical activity cardiac arrest.This is the first patient in Japan with MIS-C who required MCS devices in Japan. Appropriate and immediate treatment with immunosuppressive therapy and MCS devices is important.
Collapse
Affiliation(s)
| | | | | | - Ayaka Ohara
- Department of Pediatrics, Nara Medical University
| | - Yuji Asai
- Department of Cardiovascular Medicine, Nara Medical University
| | - Tomoya Ueda
- Department of Cardiovascular Medicine, Nara Medical University
| | - Maiko Takeda
- Department of Diagnostic Pathology, Nara Medical University
| | - Koushi Tanaka
- Department of Emergency and Critical Care Medicine, Nara Medical University
| | - Hidetada Fukushima
- Department of Emergency and Critical Care Medicine, Nara Medical University
| | - Makoto Watanabe
- Department of Cardiovascular Medicine, Nara Medical University
| | - Keiji Nogami
- Department of Pediatrics, Nara Medical University
| |
Collapse
|
4
|
Hatano G, Matsuo S, Asai Y, Suzuki S, Iwata M. Effects of High-Intensity Stretch with Moderate Pain and Maximal Intensity Stretch without Pain on Flexibility. J Sports Sci Med 2022; 21:171-181. [PMID: 35719229 PMCID: PMC9157514 DOI: 10.52082/jssm.2022.171] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 03/09/2022] [Indexed: 06/15/2023]
Abstract
In this study, we aimed to identify the time course effects of different intensities of static stretch (SST) (maximal intensity without pain vs. high-intensity with moderate pain) on flexibility. This study included 16 healthy students (8 men and 8 women) who performed 1) 5-minute SST at 100%, 2) 110%, and 3) 120% intensity, as well as 4) no stretching (control) in a random sequence on four separate days. Static passive torque (SPT), hamstring electromyography (EMG), and pain intensity were continuously recorded during SST. We assessed markers of stiffness, range of motion (ROM), and maximal dynamic passive torque (DPTmax) before SST and 0, 15, 30, 45, 60, 75, and 90 minutes after SST. Stiffness decreased and ROM and DPTmax increased significantly immediately after SST at the three different intensity levels (p < 0.05). The effects of SST at 120% intensity were stronger and lasted longer than the effects of SST at 110% and 100% intensity (stiffness: -17%, -9%, and -7%, respectively; ROM: 14%, 10%, and 6%, respectively; DPTmax: 15%, 15%, and 9%, respectively). SPT decreased after SST at all intensities (p < 0.05). SST at 120% intensity caused a significantly greater reduction in SPT than SST at 100% intensity (p < 0.05). Pain intensity and EMG activity increased immediately after the onset of SST at 120% intensity (p < 0.05), although these responses were attenuated over time. Stretching intensity significantly correlated with the degree of change in ROM and stiffness (p < 0.05). These results support our hypothesis that stretch-induced flexibility is amplified and prolonged with an increase in stretch intensity beyond the pain threshold. Additional studies with more participants and different demographics are necessary to examine the generalizability of these findings.
Collapse
Affiliation(s)
- Genki Hatano
- Institute of Sport Science, ASICS Corporation, Kobe, Japan
| | - Shingo Matsuo
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Yuji Asai
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Shigeyuki Suzuki
- Department of Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Japan
- Department of Health and Sports Sciences, School of Health Sciences, Asahi University, Mizuho, Japan
| | - Masahiro Iwata
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| |
Collapse
|
5
|
Horii C, Iidaka T, Muraki S, Oka H, Asai Y, Tsutsui S, Hashizume H, Yamada H, Yoshida M, Kawaguchi H, Nakamura K, Akune T, Oshima Y, Tanaka S, Yoshimura N. The cumulative incidence of and risk factors for morphometric severe vertebral fractures in Japanese men and women: the ROAD study third and fourth surveys. Osteoporos Int 2022; 33:889-899. [PMID: 34797391 DOI: 10.1007/s00198-021-06143-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 02/17/2021] [Accepted: 08/30/2021] [Indexed: 10/19/2022]
Abstract
UNLABELLED This population-based cohort study with a 3-year follow-up revealed that the annual incidence rates of vertebral fracture (VF) and severe VF (sVF) were 5.9%/year and 1.7%/year, respectively. The presence of mild VF at the baseline was a significant risk factor for incident sVF in participants without prevalent sVF. INTRODUCTION This study aimed to estimate the incidence of morphometric vertebral fracture (VF) and severe VF (sVF) in men and women and clarify whether the presence of a mild VF (mVF) increases the risk of incident sVF. METHODS Data from the population-based cohort study, entitled the Research on Osteoarthritis/Osteoporosis Against Disability (ROAD) study, were analyzed. In total, 1190 participants aged ≥ 40 years (mean age, 65.0 ± 11.2) years completed whole-spine lateral radiography both at the third (2012-2013, baseline) and fourth surveys performed 3 years later (2015-2016, follow-up). VF was defined using Genant's semi-quantitative (SQ) method: VF as SQ ≥ 1, mVF as SQ = 1, and sVF as SQ ≥ 2. Cumulative incidence of VF and sVF was estimated. Multivariate logistic regression analyses were performed to evaluate risk factors for incident sVF. RESULTS The baseline prevalence of mVF and sVF were 16.8% and 6.0%, respectively. The annual incidence rates of VF and sVF were 5.9%/year and 1.7%/year, respectively. The annual incidence rates of sVF in participants without prevalent VF, with prevalent mVF, and with prevalent sVF were 0.6%/year, 3.8%/year, and 11.7%/year (p < 0.001), respectively. Multivariate logistic regression analyses in participants without prevalent sVF showed that the adjusted odds ratios for incident sVF were 4.12 [95% confident interval 1.85-9.16] and 4.53 [1.49-13.77] if the number of prevalent mVF at the baseline was 1 and ≥ 2, respectively. CONCLUSIONS The annual incidence rates of VF and sVF were 5.9%/year and 1.7%/year, respectively. The presence of prevalent mVF was an independent risk factor for incident sVF.
Collapse
Affiliation(s)
- C Horii
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - T Iidaka
- Department of Preventive Medicine for Locomotive Organ Disorders, 22nd Century Medical & Research Center, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - S Muraki
- Department of Preventive Medicine for Locomotive Organ Disorders, 22nd Century Medical & Research Center, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - H Oka
- Department of Medical Research and Management for Musculoskeletal Pain, 22nd Century Medical & Research Center, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Y Asai
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - S Tsutsui
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - H Hashizume
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - H Yamada
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - M Yoshida
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - H Kawaguchi
- Department of Orthopaedic Surgery, Tokyo Neurological Center, 4-1-17, Toranomon, Minato-ku, Tokyo, 105-0001, Japan
| | - K Nakamura
- Department of Orthopaedics, Towa Hospital, Towa 4-7-10, Adachi-ku, Tokyo, 120-0003, Japan
| | - T Akune
- Department of Orthopaedics, National Rehabilitation Center for Persons With Disabilities, 4-1 Namiki, Tokorozawa City, Saitama, 359-0042, Japan
| | - Y Oshima
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - S Tanaka
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Noriko Yoshimura
- Department of Preventive Medicine for Locomotive Organ Disorders, 22nd Century Medical & Research Center, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan.
| |
Collapse
|
6
|
Asai H, Murakami S, Morimoto H, Asai Y, Johnson EG, Yamashita Y, Horiba M, Mizutani Y, Kabaya K, Ueki Y. Effects of a walking program in patients with chronic unilateral vestibular hypofunction. J Phys Ther Sci 2022; 34:85-91. [PMID: 35221509 PMCID: PMC8860696 DOI: 10.1589/jpts.34.85] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 11/11/2021] [Indexed: 11/24/2022] Open
Abstract
[Purpose] Patients with chronic unilateral vestibular hypofunction show decreased
postural stability and low levels of physical activity and also experience much anxiety.
Physical activity is known to improve these symptoms; however, no study has reported any
positive effects of physical activity, such as symptom reduction or improvement in
function in these patients. In this study, we investigated the role of a walking program
in improvement of dizziness, anxiety, and postural stability in this patient population.
[Participants and Methods] This study included 21 patients with unilateral vestibular
hypofunction and chronic dizziness. Patients were instructed to walk 30 min daily for 3
months. Physical activity levels and questionnaires for clinical symptoms, anxiety, and
postural stability were evaluated before and after intervention. [Results] We observed
significant differences in the amount of moderate-to-vigorous physical activity, clinical
symptoms, and self-perceived handicap before and after the intervention. Additionally,
anxiety levels were significantly reduced and postural stability was significantly
improved in these patients. [Conclusion] A walking program improved physical activity
levels, clinical symptoms, and postural stability and reduced self-perceived handicap and
anxiety in patients with chronic unilateral vestibular hypofunction. These results
highlight the effectiveness of a walking program for these patients and emphasize its role
as a complementary vestibular rehabilitation strategy.
Collapse
Affiliation(s)
- Hayato Asai
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University: 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Satona Murakami
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University: 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Hiroyuki Morimoto
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University: 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan.,Department of Rehabilitation, Mizutani Hospital, Japan
| | - Yuji Asai
- Department of Physical Therapy, School of Health Science, Nihon Fukushi University, Japan
| | - Eric G Johnson
- Department of Physical Therapy, School of Allied Health Professions, Loma Linda University, USA
| | - Yutaka Yamashita
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University: 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Mitsuya Horiba
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University: 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Yoko Mizutani
- Department of Orthopedic Surgery, Mizutani Hospital, Japan
| | - Kayoko Kabaya
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medical Sciences, Nagoya City University, Japan
| | - Yoshino Ueki
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University: 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| |
Collapse
|
7
|
Ho JSS, Asai Y. Commentary on the British Association of Dermatologists guidelines for the management of people with rosacea 2021. Br J Dermatol 2021; 185:689-690. [PMID: 34378187 DOI: 10.1111/bjd.20631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/02/2021] [Accepted: 07/03/2021] [Indexed: 11/29/2022]
Affiliation(s)
- J S S Ho
- School of Medicine, Queen's University, Kingston, ON, Canada
| | - Y Asai
- School of Medicine, Queen's University, Kingston, ON, Canada.,Division of Dermatology, Department of Medicine, Queen's University, Kingston, ON, Canada
| |
Collapse
|
8
|
Hayashi K, Fukuyasu-Matsuo S, Inoue T, Fujiwara M, Asai Y, Iwata M, Suzuki S. Effects of cyclic stretching exercise on long-lasting hyperalgesia, joint contracture, and muscle injury following cast immobilization in rats. Physiol Res 2020; 69:861-870. [PMID: 32901491 DOI: 10.33549/physiolres.934437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The effects of exercise on mechanical hyperalgesia, joint contracture, and muscle injury resulting from immobilization are not completely understood. This study aimed to investigate the effects of cyclic stretching on these parameters in a rat model of chronic post-cast pain (CPCP). Seventeen 8-week-old Wistar rats were randomly assigned to (1) control group, (2) immobilization (CPCP) group, or (3) immobilization and stretching exercise (CPCP+STR) group. In the CPCP and CPCP+STR groups, both hindlimbs of each rat were immobilized in full plantar flexion with a plaster cast for a 4-week period. In the CPCP+STR group, cyclic stretching exercise was performed 6 days/week for 2 weeks, beginning immediately after cast removal prior to reloading. Although mechanical hyperalgesia in the plantar skin and calf muscle, ankle joint contracture, and gastrocnemius muscle injury were observed in both immobilized groups, these changes were significantly less severe in the CPCP+STR group than in the CPCP group. These results clearly demonstrate the beneficial effect of cyclic stretching exercises on widespread mechanical hyperalgesia, joint contracture, and muscle injury in a rat model of CPCP.
Collapse
Affiliation(s)
- K Hayashi
- Multidisciplinary Pain Center, Aichi Medical University, Nagakute, Japan, Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan.
| | | | | | | | | | | | | |
Collapse
|
9
|
Fukaya T, Matsuo S, Iwata M, Yamanaka E, Tsuchida W, Asai Y, Suzuki S. Acute and chronic effects of static stretching at 100% versus 120% intensity on flexibility. Eur J Appl Physiol 2020; 121:513-523. [PMID: 33151438 DOI: 10.1007/s00421-020-04539-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 10/22/2020] [Indexed: 11/27/2022]
Abstract
PURPOSE The acute effects of static stretching have been frequently studied, but the chronic effects have not been studied concurrently. Thus, this study aimed to investigate both the acute and chronic effects of static stretching at different intensities on flexibility. METHODS Twenty-three healthy men were randomly assigned to perform 1 min of static stretching 3 days/week for 4 weeks at 100% intensity (n = 12) or 120% intensity (n = 11). The acute effects of stretching were assessed by measuring the range of motion (ROM), peak passive torque, and passive stiffness before and after every stretching session; the chronic effects of stretching were assessed by measuring these outcomes at baseline and after 2 and 4 weeks of stretching. RESULTS Compared with the 100% intensity group, the 120% intensity group had significantly greater acute increases in ROM after all 12 sessions, a significantly greater decrease in passive stiffness after 11 of 12 sessions, and a significantly greater increase in peak passive torque after six of 12 sessions. Regarding the chronic effects, ROM was significantly increased in both groups after 2 and 4 weeks of stretching. Peak passive torque significantly increased in the 100% intensity group after 2 and 4 weeks of stretching, and after 4 weeks in the 120% intensity group. CONCLUSION Stretching at 120% intensity resulted in significantly greater acute improvements in ROM, peak passive torque, and stiffness than stretching at 100% intensity. Four weeks of stretching increased ROM and peak passive torque but did not decrease passive stiffness, regardless of the stretching intensity.
Collapse
Affiliation(s)
- Taizan Fukaya
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata, Niigata, 950-3198, Japan
- Department of Rehabilitation, Kyoto Kujo Hospital, 10 Karahashirajoumon-cho, Minami-ku, Kyoto, 601-8453, Japan
| | - Shingo Matsuo
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, 26-2 Higashihaemi-cho, Handa, Aichi, 475-0012, Japan.
| | - Masahiro Iwata
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, 26-2 Higashihaemi-cho, Handa, Aichi, 475-0012, Japan
- Department of Physical and Occupational Therapy, Nagoya University Graduate School of Medicine, 1-1-20 Daiko-Minami, Higashi-ku, Nagoya, 461-8673, Japan
| | - Eiji Yamanaka
- Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, 4-4-1 Yatsu, Narashino, Chiba, Japan
| | - Wakako Tsuchida
- Department of Life Science and Biotechnology, Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa, 761-0395, Japan
| | - Yuji Asai
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, 26-2 Higashihaemi-cho, Handa, Aichi, 475-0012, Japan
| | - Shigeyuki Suzuki
- Department of Health and Sports Sciences, School of Health Sciences, Asahi University, 1851 Hozumi, Mizuho, Gifu, 501-0296, Japan
| |
Collapse
|
10
|
Fujiwara M, Yoshito N, Iwata M, Lee-Hotta S, Inoue T, Aizawa Y, Kametaka S, Asai Y, Suzuki S. Median nerve injury does not contribute to early onset of decreased grip strength due to repetitive reaching and grasping tasks in rats. Neuro Endocrinol Lett 2020; 41:76-85. [PMID: 33185994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 05/16/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Workplace risk factors, such as repetitive tasks, can cause work-related musculoskeletal disorders. In a rat model, decreased grip strength and median nerve injury develop following repetitive reaching and grasping tasks, involving negligible force. OBJECTIVE We investigated whether median nerve injury is involved in the early onset of decreased grip strength due to such tasks METHODS: Sprague-Dawley rats were divided into: non-task-performing (0-week) and task-performing (1-, 2-, and 3-week) groups. After an initial training period, the task-performing groups continued to perform the task for 2 h/day, 3 days/week, for 1-3 weeks. Grip strength and relative muscle weight of the flexor digitorum superficialis (FDS) muscle were measured. Median nerve injury was evaluated by histopathology and immunohistochemistry. RESULTS Grip strength of the reach limb (forelimb used in tasks) was significantly lower in the 3-week group compared with the other groups and was significantly lower than that of the non-reach limb in all groups. There were no significant differences in the relative FDS muscle weights of either limb among groups. No evidence of median nerve demyelination was observed and no cells expressed activating transcription factor-3, a specific marker of peripheral nerve injury, in the anterior horn of the spinal cord. CONCLUSION Median nerve injury does not contribute to the decreased grip strength caused by 3 weeks of repetitive reaching and grasping tasks, involving negligible force, in rats.
Collapse
Affiliation(s)
- Mitsuhiro Fujiwara
- Department of Rehabilitation, Kamiiida Rehabilitation Hospital, Nagoya, Japan
| | - Natsumi Yoshito
- Department of Rehabilitation, Nagoya City University Hospital, Nagoya, Japan
| | - Masahiro Iwata
- Department of Physical and Occupational Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Sachiko Lee-Hotta
- Department of Physical and Occupational Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takayuki Inoue
- Department of Rehabilitation, Nagoya University Hospital, Nagoya, Japan
| | - Yosuke Aizawa
- Department of Rehabilitation, Japanese Red Cross Nagoya Daiichi Hospital, Nagoya, Japan
| | - Satoshi Kametaka
- Department of Physical and Occupational Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yuji Asai
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Shigeyuki Suzuki
- Department of Health and Sports Sciences, School of Health Sciences, Asahi University, Mizuho, Japan
| |
Collapse
|
11
|
Iwata M, Inoue T, Asai Y, Hori K, Fujiwara M, Matsuo S, Tsuchida W, Suzuki S. The protective role of localized nitric oxide production during inflammation may be mediated by the heme oxygenase-1/carbon monoxide pathway. Biochem Biophys Rep 2020; 23:100790. [PMID: 32760814 PMCID: PMC7390790 DOI: 10.1016/j.bbrep.2020.100790] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 07/09/2020] [Accepted: 07/15/2020] [Indexed: 12/17/2022] Open
Abstract
Nitric oxide (NO) is an important part of the host defense mechanism; however, it displays both pro- and anti-inflammatory properties depending on its location and concentration. Importantly, excessive or inappropriate NO production can cause tissue damage. Systemic and local administration of NO synthase (NOS) inhibitors ameliorates and may exacerbate the inflammatory response, respectively. Here, we used a carrageenan-induced pleurisy model of acute inflammation in rats to confirm the location-dependent effects of NO and investigate the underlying mechanisms. As expected, localized suppression of NO production exacerbated inflammation, as evidenced by increased pleural exudate volumes and leukocyte counts and enhanced activity of enzymes related to oxidative stress. In contrast, local NO supplementation reduced leukocyte infiltration, vascular permeability, and the activity of oxidative stress-related enzymes. Interestingly, inhibition of heme oxygenase-1 (HO-1) reversed the anti-inflammatory effects of localized NO production, while the addition of hemin (HO-1 substrate) or carbon monoxide (CO; HO-1 metabolite) decreased leukocyte migration and exudation. Together, these findings confirm a protective role for NO at the inflammatory site, which appears to be mediated via NOS induction of the HO-1/CO pathway. Thus, NO supplementation may be a potential new treatment for oxidative stress-associated inflammatory diseases. Systemic NOS inhibition ameliorated inflammation in a rat Cg-induced pleurisy model. Conversely, localized NOS inhibition increased all examined markers of inflammation. HO-1, hemin, and CO enhanced the localized anti-inflammatory effects of NO. NOC-18, l-arginine, hemin, and CORM-3 decreased levels of inflammatory cytokines. The localized anti-inflammatory effect of NO may be mediated via the HO-1/CO pathway.
Collapse
Affiliation(s)
- Masahiro Iwata
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, 26-2 Higashihaemi-cho, Handa, Aichi, 475-0012, Japan.,Department of Physical and Occupational Therapy, Nagoya University Graduate School of Medicine, 1-1-20 Daiko-Minami, Higashi-ku, Nagoya, 461-8673, Japan
| | - Takayuki Inoue
- Department of Rehabilitation, Nagoya University Hospital, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8560, Japan
| | - Yuji Asai
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, 26-2 Higashihaemi-cho, Handa, Aichi, 475-0012, Japan
| | - Kiyomi Hori
- Department of Functional Anatomy, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa, 920-8640, Japan
| | - Mitsuhiro Fujiwara
- Department of Physical and Occupational Therapy, Nagoya University Graduate School of Medicine, 1-1-20 Daiko-Minami, Higashi-ku, Nagoya, 461-8673, Japan.,Kamiiida Rehabilitation Hospital, 3-57 Kamiiida Kita-machi, Kita-ku, Nagoya, 462-0802, Japan
| | - Shingo Matsuo
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, 26-2 Higashihaemi-cho, Handa, Aichi, 475-0012, Japan
| | - Wakako Tsuchida
- Department of Life Science and Biotechnology, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa, 761-0395, Japan
| | - Shigeyuki Suzuki
- Department of Health and Sports Sciences, School of Health Sciences, Asahi University, 1851 Hozumi, Mizuho, Gifu, 501-0296, Japan
| |
Collapse
|
12
|
Matsuo S, Iwata M, Miyazaki M, Fukaya T, Yamanaka E, Nagata K, Tsuchida W, Asai Y, Suzuki S. Changes in Flexibility and Force are not Different after Static Versus Dynamic Stretching. Sports Med Int Open 2019; 3:E89-E95. [PMID: 31650019 PMCID: PMC6811350 DOI: 10.1055/a-1001-1993] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 08/06/2019] [Accepted: 08/07/2019] [Indexed: 11/17/2022] Open
Abstract
In this study, we examined the effects of static and dynamic stretching on range
of motion (ROM), passive torque (PT) at pain onset, passive stiffness, and
isometric muscle force. We conducted a randomized crossover trial in which 16
healthy young men performed a total of 300 s of active static or dynamic
stretching of the right knee flexors on two separate days in random order. To
assess the effects of stretching, we measured the ROM, PT at pain onset, passive
stiffness during passive knee extension, and maximum voluntary isometric knee
flexion force using an isokinetic dynamometer immediately before and after
stretching. Both static and dynamic stretching significantly increased the ROM
and PT at pain onset (p<0.01) and significantly decreased the passive
stiffness and isometric knee flexion force immediately after stretching
(p<0.01). However, the magnitude of change did not differ between the
two stretching methods for any measurements. Our results suggest that
300 s of either static or dynamic stretching can increase flexibility
and decrease isometric muscle force; however, the effects of stretching do not
appear to differ between the two stretching methods.
Collapse
Affiliation(s)
- Shingo Matsuo
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Masahiro Iwata
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan.,Department of Physical and Occupational Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Manabu Miyazaki
- Department of Physical Therapy, Faculty of Medical Science for Health, Teikyo Heisei University, Toshima-ku, Japan
| | - Taizan Fukaya
- Department of Rehabilitation, Kyoto Kujo Hospital, Kyoto, Japan
| | - Eiji Yamanaka
- Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, Narashino, Japan
| | - Kentaro Nagata
- Department of Rehabilitation, Kariya Toyota General Hospital, Kariya, Japan
| | - Wakako Tsuchida
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan.,Department of Physical and Occupational Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yuji Asai
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Shigeyuki Suzuki
- Department of Health and Sports Sciences, School of Health Sciences, Asahi University, Mizuho, Japan
| |
Collapse
|
13
|
Asai Y. The effect of integrated volitional control electrical stimulation (IVES) toward chronic stroke patients. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1500] [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] [Indexed: 11/27/2022]
|
14
|
Iwata M, Yamamoto A, Matsuo S, Hatano G, Miyazaki M, Fukaya T, Fujiwara M, Asai Y, Suzuki S. Dynamic Stretching Has Sustained Effects on Range of Motion and Passive Stiffness of the Hamstring Muscles. J Sports Sci Med 2019; 18:13-20. [PMID: 30787647 PMCID: PMC6370952] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
Dynamic stretching (DS) is often performed during warm-up to help avoid hamstring muscle injuries, increase joint flexibility, and optimize performance. We examined the effects of DS of the hamstring muscles on passive knee extension range of motion (ROM), passive torque (PT) at the onset of pain (as a measure of stretch tolerance), and passive stiffness of the muscle-tendon unit over an extended period after stretching. Twenty-four healthy subjects participated, with 12 each in the experimental and control groups. Stretching was performed, and measurements were recorded using an isokinetic dynamometer pre-intervention, and at 0, 15, 30, 45, 60, 75, and 90 min post-intervention. DS consisted of ten 30-s sets of 15 repetitions of extension and relaxation of the hamstrings. ROM increased significantly (range, 7%-10%) immediately after DS, and the increase was sustained over 90 min. PT at the onset of pain also increased immediately by 10% but returned to baseline by 30 min. Passive stiffness decreased significantly (range, 7.9%-16.7%) immediately after DS, and the decrease was sustained over 90 min. Post-DS values were normalized to pre-DS values for the respective outcomes in both groups. ROM was significantly higher (range, 7.4%-10%) and passive stiffness was significantly lower (range, 5.4%-14.9%) in the experimental group relative to the control group at all time points. Normalized PT values at the onset of pain were significantly higher in the experimental group at 0-15 min than in the controls, but the differences were smaller at 30-45 min and not significant thereafter. We conclude that DS increases ROM and decreases passive stiffness in a sustained manner, and increases PT at the onset of pain for a shorter period. Overall, our results indicate that when performed prior to exercise, DS is beneficial for the hamstring muscles in terms of increasing flexibility and reducing stiffness.
Collapse
Affiliation(s)
- Masahiro Iwata
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
- Department of Physiology, University of Kentucky, Lexington, USA
- Program in Physical and Occupational Therapy, Nagoya University, Nagoya, Japan
| | | | - Shingo Matsuo
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Genki Hatano
- Institute of Sport Science, ASICS Corporation, Kobe, Japan
| | - Manabu Miyazaki
- Department of Physical Therapy, Faculty of Medical Science for Health, Teikyo Heisei University, Toshima-ku, Japan
| | | | - Mitsuhiro Fujiwara
- Program in Physical and Occupational Therapy, Nagoya University, Nagoya, Japan
- Kamiiida Rehabilitation Hospital, Nagoya, Japan
| | - Yuji Asai
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Shigeyuki Suzuki
- Department of Health and Sports Sciences, School of Health Sciences, Asahi University, Mizuho, Japan
| |
Collapse
|
15
|
Koide Y, Ueki Y, Asai Y, Morimoto H, Asai H, Johnson EG, Lohman EB, Sakuma E, Mizutani J, Ueki T, Wada I. Differences in postural stability and dynamic visual acuity among healthy young adults in relation to sports activity: a cross sectional study. J Phys Ther Sci 2019; 31:53-56. [PMID: 30774205 PMCID: PMC6348173 DOI: 10.1589/jpts.31.53] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 10/07/2018] [Indexed: 12/02/2022] Open
Abstract
[Purpose] Sports activity has been shown to improve postural stability and vestibular
function in healthy older adults. The hypothesis was that healthy young adults undertaking
sports activity will also have better postural stability and vestibular function compared
with healthy young adults who do not undertake sports activity. The purpose of this study
was to investigate the differences in postural stability and vestibular function between
healthy young adults who undertake sports activity and those who do not undertake such
activity. [Participants and Methods] Thirty-nine healthy young adults were recruited and
divided into sports and non-sports groups on the basis of their response to a
questionnaire concerning regular participation in sports activities over the past 12
months. In both groups, postural stability was measured during quiet standing and standing
during head rotation, and dynamic visual acuity was assessed during head rotation.
[Results] The results showed significant differences in postural stability during head
rotation and dynamic visual acuity between the two groups, whereas no significant
differences were found in postural stability during quiet standing. [Conclusion] The
results suggest that healthy young adults who undertake sports activity have better
postural stability during head rotation and better dynamic visual acuity. The causal
effect of these differences is not clear and further investigation is warranted.
Collapse
Affiliation(s)
- Yoshinori Koide
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya-City University: 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Yoshino Ueki
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya-City University: 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Yuji Asai
- Department of Physical Therapy, School of Health Science, Nihon Fukushi University, Japan
| | - Hiroyuki Morimoto
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya-City University: 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Hayato Asai
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya-City University: 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Eric G Johnson
- Department of Physical Therapy, School of Allied Health Professions, Loma Linda University, USA
| | - Everett B Lohman
- Department of Physical Therapy, School of Allied Health Professions, Loma Linda University, USA
| | - Eisuke Sakuma
- Department of Integrative Anatomy, Graduate School of Medical Sciences, Nagoya-City University, Japan
| | - Jun Mizutani
- Department of Orthopedic Surgery, Graduate School of Medical Sciences, Nagoya-City University, Japan
| | - Takatoshi Ueki
- Department of Integrative Anatomy, Graduate School of Medical Sciences, Nagoya-City University, Japan
| | - Ikuo Wada
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya-City University: 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| |
Collapse
|
16
|
Asai Y, Obayashi K, Oume M, Ogura M, Takeuchi K, Yamagami Y, Tai Y, Kurumatani N, Saeki K. Farming habit, light exposure, physical activity, and depressive symptoms. A cross-sectional study of the HEIJO-KYO cohort. J Affect Disord 2018; 241:235-240. [PMID: 30138807 DOI: 10.1016/j.jad.2018.08.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 03/04/2018] [Revised: 07/12/2018] [Accepted: 08/03/2018] [Indexed: 11/30/2022]
Abstract
BACKGROUND Bright light therapy and exercise interventions are effective methods for treating seasonal and non-seasonal affective disorders. Synchronization of internal circadian rhythms with the external environment by light therapy and physical activity may partly explain its efficacy. In the present study, we objectively measured daytime light exposure and physical activity in real life situations with elderly participants, and investigated the association between farming habits and the prevalence of depressive symptoms. METHODS This cross-sectional was conducted among 1005 participants (mean age: 71.5) of a community-based cohort study. Depressive symptoms were assessed by the Geriatric Depression Scale (GDS score ≥ 6) and administration of antidepressant. RESULTS Farming habit with long duration (> 7.0 h/week) showed significantly lower odds ratios (OR) for depressive symptoms (adjusted OR 0.63, 95% confidential interval,0.41 to 0.96) compared with participants without farming habit independent of confounders such as age, gender, body mass index smoking, drinking, daytime ambulatory systolic blood pressure, diabetes, living alone, education, income, and daylength. Even in farming with short duration (≤ 7.0 h/week), we found significant association with lower OR for depressive symptoms (adjusted OR 0.64, 95%CI, 0.42 to 0.97). Light exposure and daytime physical activity measured by wrist actigraphy were significantly higher among participants with longer farming habits (p for trend < 0.01). Physical activity mediated 12.0% of association between farming habit and depressive symptoms. LIMITATIONS A cross-sectional association may be found because the participants with depressive symptoms tended to avoid farming. A longitudinal study is warranted to determine the direction of causality. CONCLUSIONS Participants with farming habit showed significantly lower OR for depressive symptoms than those without farming habit, and it was partly mediated by physical activity.
Collapse
Affiliation(s)
- Yuji Asai
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Kenji Obayashi
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Masataka Oume
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Moe Ogura
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Katsuya Takeuchi
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Yuki Yamagami
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Yoshiaki Tai
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan; Department of General Medicine, Nara Medical University School of Medicine, Nara, Japan
| | - Norio Kurumatani
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan
| | - Keigo Saeki
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, Japan.
| |
Collapse
|
17
|
Watanabe K, Sakuraya A, Kawakami N, Imamura K, Ando E, Asai Y, Eguchi H, Kobayashi Y, Nishida N, Arima H, Shimazu A, Tsutsumi A. Work-related psychosocial factors and metabolic syndrome onset among workers: a systematic review and meta-analysis. Obes Rev 2018; 19:1557-1568. [PMID: 30047228 DOI: 10.1111/obr.12725] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [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: 03/05/2018] [Revised: 05/14/2018] [Accepted: 05/31/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Work-related psychosocial factors have been associated with metabolic syndrome. However, no systematic reviews or meta-analyses have evaluated this association. METHODS A systematic literature search was conducted, using PubMed, Embase, PsycINFO, PsycARTICLES and the Japan Medical Abstracts Society. Eligible studies included those that examined the previously mentioned association; had a longitudinal or prospective cohort design; were conducted among workers; provided sufficient data for calculating odds ratios, relative risks or hazard ratios with 95% confidence intervals; were original articles in English or Japanese; and were published no later than 2016. Study characteristics, exposure and outcome variables and association measures of studies were extracted by the investigators independently. RESULTS Among 4,664 identified studies, 8 were eligible for review and meta-analysis. The pooled risk of adverse work-related stress on metabolic syndrome onset was significant and positive (RR = 1.47; 95% CI, 1.22-1.78). Sensitivity analyses limiting only the effects of job strain and shift work also indicated a significant positive relationship (RR = 1.75; 95% CI, 1.09-2.79; and RR = 1.59; 95% CI, 1.00-2.54, P = 0.049 respectively). CONCLUSION This study reveals a strong positive association between work-related psychosocial factors and an elevated risk of metabolic syndrome onset. The effects of job strain and shift work on metabolic syndrome appear to be significant.
Collapse
Affiliation(s)
- K Watanabe
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - A Sakuraya
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - N Kawakami
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - K Imamura
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - E Ando
- Department of Social and Environmental Health, Division of Environmental Medicine and Population Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Y Asai
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - H Eguchi
- Department of Public Health, Kitasato University School of Medicine, Sagamihara-shi, Kanagawa, Japan
| | | | - N Nishida
- Kyoto Industrial Health Association, Kyoto, Japan
| | - H Arima
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - A Shimazu
- Center for Human and Social Sciences, Kitasato University College of Liberal Arts and Sciences, Sagamihara-shi, Kanagawa, Japan
| | - A Tsutsumi
- Department of Public Health, Kitasato University School of Medicine, Sagamihara-shi, Kanagawa, Japan
| |
Collapse
|
18
|
Asai Y, Nishiura H. Identifying the transmission route of influenza A(H1N1) 2009 in Japan by geographic, effective and phylogenetic distances. Int J Infect Dis 2018. [DOI: 10.1016/j.ijid.2018.04.3891] [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] [Indexed: 10/28/2022] Open
|
19
|
Morimoto H, Asai Y, Johnson EG, Koide Y, Niki J, Sakai S, Nakayama M, Kabaya K, Fukui A, Mizutani Y, Mizutani T, Ueki Y, Mizutani J, Ueki T, Wada I. Objective measures of physical activity in patients with chronic unilateral vestibular hypofunction, and its relationship to handicap, anxiety and postural stability. Auris Nasus Larynx 2018; 46:70-77. [PMID: 30691599 DOI: 10.1016/j.anl.2018.06.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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: 10/16/2017] [Revised: 05/13/2018] [Accepted: 06/22/2018] [Indexed: 01/06/2023]
Abstract
OBJECTIVE Dizziness is one of the most common symptoms in the general population. Patients with dizziness experience balance problems and anxiety, which can lead to decreased physical activity levels and participation in their daily activities. Moreover, recovery of vestibular function from vestibular injury requires physical activity. Although there are reports that decreased physical activity is associated with handicap, anxiety, postural instability and reduced recovery of vestibular function in patients with chronic dizziness, these data were collected by self-report questionnaires. Therefore, the objective data of physical activity and the relationships between physical activity, handicap, anxiety and postural stability in patients with chronic dizziness are not clear. The purpose of this research was to objectively measure the physical activity of patients with chronic dizziness in daily living as well as handicap, anxiety and postural stability compared to healthy adults. Additionally, we aimed to investigate the relationships between physical activity, handicap, anxiety and postural stability in patients with chronic dizziness. METHODS Twenty-eight patients with chronic dizziness of more than 3 months caused by unilateral vestibular hypofunction (patient group) and twenty-eight age-matched community dwelling healthy adults (healthy group) participated in this study. The amount of physical activity including time of sedentary behavior, light physical activity, moderate to vigorous physical activity and total physical activity using tri-axial accelerometer, self-perceived handicap and anxiety using questionnaires, and postural stability were measured using computerized dynamic posturography. RESULTS The results showed worse handicap, anxiety and postural stability in the patient group compared to the healthy group. Objective measures of physical activity revealed that the patient group had significantly longer time of sedentary behavior, shorter time of light physical activity, and shorter time of total physical activity compared to the healthy group; however, time of moderate to vigorous physical activity was not significantly different between groups. Moreover, there were correlations between physical activity and postural stability in the patient group, while there were no correlations between physical activity, handicap or anxiety in the patient group. CONCLUSION These results suggest that objectively measured physical activity of the patients with chronic unilateral vestibular hypofunction is lower compared to the healthy adults, and less active patients showed decreased postural stability. However, the details of physical activity and causal effect between physical activity and postural stability were not clear and further investigation is needed.
Collapse
Affiliation(s)
- Hiroyuki Morimoto
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University, 1, Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan; Department of Rehabilitation, Mizutani Hospital, 3-4-1, Kanayama-cho, Atsuta-ku, Nagoya 456-0002, Japan
| | - Yuji Asai
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University, 1, Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan; Department of Physical Therapy, School of Health Science, Nihon Fukushi University, 2-26, Higashihaemi-cho, Handa 475-0012, Japan
| | - Eric G Johnson
- Department of Physical Therapy, School of Allied Health Professions, Loma Linda University, 24951, Circle Drive, Loma Linda, CA 92354, USA
| | - Yoshinori Koide
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University, 1, Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Junichi Niki
- Department of Rehabilitation, Mizutani Hospital, 3-4-1, Kanayama-cho, Atsuta-ku, Nagoya 456-0002, Japan
| | - Shigeki Sakai
- Department of Rehabilitation, Mizutani Hospital, 3-4-1, Kanayama-cho, Atsuta-ku, Nagoya 456-0002, Japan
| | - Meiho Nakayama
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medical Sciences, Nagoya City University, 1, Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan.
| | - Kayoko Kabaya
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medical Sciences, Nagoya City University, 1, Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Ayako Fukui
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medical Sciences, Nagoya City University, 1, Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Yoko Mizutani
- Department of Orthopedics, Mizutani Hospital, 3-4-1, Kanayama-cho, Atsuta-ku, Nagoya 456-0002, Japan
| | - Takehiko Mizutani
- Department of Orthopedics, Mizutani Hospital, 3-4-1, Kanayama-cho, Atsuta-ku, Nagoya 456-0002, Japan
| | - Yoshino Ueki
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University, 1, Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Jun Mizutani
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University, 1, Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Takatoshi Ueki
- Department of Integrative Anatomy, Graduate School of Medical Sciences, Nagoya City University, 1, Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Ikuo Wada
- Department of Rehabilitation Medicine, Graduate School of Medical Sciences, Nagoya City University, 1, Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| |
Collapse
|
20
|
Kataura S, Suzuki S, Matsuo S, Hatano G, Iwata M, Yokoi K, Tsuchida W, Banno Y, Asai Y. Acute Effects of the Different Intensity of Static Stretching on Flexibility and Isometric Muscle Force. J Strength Cond Res 2018; 31:3403-3410. [PMID: 27984497 DOI: 10.1519/jsc.0000000000001752] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Kataura, S, Suzuki, S, Matsuo, S, Hatano, G, Iwata, M, Yokoi, K, Tsuchida, W, Banno, Y, and Asai, Y. Acute effects of the different intensity of static stretching on flexibility and isometric muscle force. J Strength Cond Res 31(12): 3403-3410, 2017-In various fields, static stretching is commonly performed to improve flexibility, whereas the acute effects of different stretch intensities are unclear. Therefore, we investigated the acute effects of different stretch intensities on flexibility and muscle force. Eighteen healthy participants (9 men and 9 women) performed 180-second static stretches of the right hamstrings at 80, 100, and 120% of maximum tolerable intensity without stretching pain, in random order. The following outcomes were assessed as markers of lower limb function and flexibility: static passive torque (SPT), range of motion (ROM), passive joint (muscle-tendon) stiffness, passive torque (PT) at onset of pain, and isometric muscle force. Static passive torque was significantly decreased after all stretching intensities (p ≤ 0.05). Compared with before stretching at 100 and 120% intensities, ROM and PT were significantly increased after stretching (p ≤ 0.05), and passive stiffness (p = 0.05) and isometric muscle force (p ≤ 0.05) were significantly decreased. In addition, ROM was significantly greater after stretching at 100 and 120% than at 80%, and passive stiffness was significantly lower after 120% than after 80% (p ≤ 0.05). However, all measurements except SPT were unchanged after 80% intensity. There was a weak positive correlation between the intensities of stretching and the relative change for SPT (p ≤ 0.05), a moderate positive correlation with ROM (p ≤ 0.05), and a moderate positive correlation with passive stiffness (p ≤ 0.05). These results indicate that static stretching at greater intensity is more effective for increasing ROM and decreasing passive muscle-tendon stiffness.
Collapse
Affiliation(s)
- Satoshi Kataura
- Department of Rehabilitation, Kobe Century Memorial Hospital, Kobe, Japan
| | - Shigeyuki Suzuki
- Program in Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Japan
| | - Shingo Matsuo
- Program in Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Japan.,Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Genki Hatano
- ASICS Corporation, Institution of Sport Science, Kobe, Japan
| | - Masahiro Iwata
- Program in Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Japan.,Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Kazuaki Yokoi
- Department of Rehabilitation, Kameda Medical Center, Kamogawa, Japan
| | - Wakako Tsuchida
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Yasuhiro Banno
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| | - Yuji Asai
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan
| |
Collapse
|
21
|
Miyazaki M, Asai Y, Iwakura M, Hara M. 0442 Safety and Efficacy of Suvorexant in a Real World Setting: Results from the Drug Use-results Survey in Japan. Sleep 2018. [DOI: 10.1093/sleep/zsy061.441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
22
|
Kawakami N, Imamura K, Asai Y, Watanabe K, Tsutsumi A, Shimazu A, Inoue A, Hiro H, Odagiri Y, Yoshikawa T, Yoshikawa E. 1211 The stress check program: an evaluation of the first-year implementation of the new national workplace mental health program in japan. Health Serv Res 2018. [DOI: 10.1136/oemed-2018-icohabstracts.444] [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] [Indexed: 11/03/2022] Open
|
23
|
Okochi M, Sugita T, Asai Y, Tanaka M, Honda H. Screening of peptides associated with adhesion and aggregation of Lactobacillus rhamnosus GG in vitro. Biochem Eng J 2017. [DOI: 10.1016/j.bej.2017.10.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
24
|
Miyazaki M, Asai Y, Iwakura M, Hara M. Safety and efficacy of suvorexant in a real world setting: interim results from the drug use-results survey in Japan. Sleep Med 2017. [DOI: 10.1016/j.sleep.2017.11.669] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
25
|
Tsuchida W, Suzuki S, Matsuo S, Wakano S, Asakawa M, Fukaya T, Yamanaka E, Asai Y. Effect Of Stretching On Intracerebral Oxygen Dynamics And Calculation Capability. Med Sci Sports Exerc 2017. [DOI: 10.1249/01.mss.0000520017.09089.39] [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] [Indexed: 11/21/2022]
|
26
|
Asai Y, Ohyama Y, Taiji Y, Makimura Y, Tamai R, Hashimoto M, Ogawa T. Treponema medium Glycoconjugate Inhibits Activation of Human Gingival Fibroblasts Stimulated with Phenol-Water Extracts of Periodontopathic Bacteria. J Dent Res 2016; 84:456-61. [PMID: 15840783 DOI: 10.1177/154405910508400511] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Oral treponemes are well-known as causative agents of periodontal diseases; however, the details have not been fully clarified. Here, we examined the effects of Treponema medium glycoconjugate on the activation of human gingival fibroblasts using phenol-water extracts from Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum subsp. nucleatum, and Actinobacillus actinomycetemcomitans. The phenol-water extracts activated human gingival fibroblasts to mediate IL-8 production, as well as IL-8 mRNA expression, phosphorylation of p38 mitogen-activated protein kinase, and expression of intercellular adhesion molecule-1. T. medium glycoconjugate exhibited no activation of human gingival fibroblasts, while phenol-water extract-induced activation of human gingival fibroblasts was clearly inhibited by T. medium glycoconjugate. Furthermore, binding of biotinylated phenol-water extracts to CD14 in the presence of LPS-binding protein was blocked with T. medium glycoconjugate. These results suggest that T. medium glycoconjugate has an inhibitory effect on host cell activation by periodontopathic bacteria caused by binding to CD14- and LPS-binding protein.
Collapse
Affiliation(s)
- Y Asai
- Department of Oral Microbiology, Asahi University School of Dentistry, 1851-1 Hozumi, Mizuho, Gifu 501-0296, Japan
| | | | | | | | | | | | | |
Collapse
|
27
|
Abstract
Dioxin, a powerful hormone-disrupting chemical, exhibits serious health effects when it reaches body fat. Here we analyzed coplanar polychlorinated biphenyls (PCBs) and polychlorinated-dibenzo- p-dioxins (PCDDs) in human saliva as compared with blood specimens, and examined their effects on human gingival epithelial cells (HGEC). High levels of tri- and tetrachlorinated PCBs were found in saliva, whereas we detected predominantly hexa- and heptachlorinated PCBs in blood. Among PCDDs, the saliva and blood specimens contained mainly 1,2,3,4,6,7,8,9-octachlorodibenzo- p-dioxin (OCDD). Among the toxic dioxins proposed by the World Health Organization (WHO) in 1998, 2,3′,4,4′,5-pentachlorobiphenyl (PCB 118) and OCDD, which were mainly found in saliva, significantly induced IL-8 production in HGEC. Furthermore, these two dioxins markedly augmented IL-8 production stimulated with fimbriae from Porphyromonas gingivalis, which is well-known as a pathogenic factor in periodontal diseases. These results suggest that dioxins in saliva may be a risk factor for periodontal diseases.
Collapse
Affiliation(s)
- T Ogawa
- Department of Oral Microbiology, Asahi University School of Dentistry, 1851-1 Hozumi, Mizuho, Gifu 501-0296, Japan.
| | | | | | | |
Collapse
|
28
|
Tsuchida W, Iwata M, Akimoto T, Matsuo S, Asai Y, Suzuki S. Heat Stress Modulates Both Anabolic and Catabolic Signaling Pathways Preventing Dexamethasone-Induced Muscle Atrophy In Vitro. J Cell Physiol 2016; 232:650-664. [PMID: 27649272 PMCID: PMC5132157 DOI: 10.1002/jcp.25609] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Accepted: 09/19/2016] [Indexed: 12/29/2022]
Abstract
It is generally recognized that synthetic glucocorticoids induce skeletal muscle weakness, and endogenous glucocorticoid levels increase in patients with muscle atrophy. It is reported that heat stress attenuates glucocorticoid‐induced muscle atrophy; however, the mechanisms involved are unknown. Therefore, we examined the mechanisms underlying the effects of heat stress against glucocorticoid‐induced muscle atrophy using C2C12 myotubes in vitro, focusing on expression of key molecules and signaling pathways involved in regulating protein synthesis and degradation. The synthetic glucocorticoid dexamethasone decreased myotube diameter and protein content, and heat stress prevented the morphological and biochemical glucocorticoid effects. Heat stress also attenuated increases in mRNAs of regulated in development and DNA damage responses 1 (REDD1) and Kruppel‐like factor 15 (KLF15). Heat stress recovered the dexamethasone‐induced inhibition of PI3K/Akt signaling. These data suggest that changes in anabolic and catabolic signals are involved in heat stress‐induced protection against glucocorticoid‐induced muscle atrophy. These results have a potentially broad clinical impact because elevated glucocorticoid levels are implicated in a wide range of diseases associated with muscle wasting. J. Cell. Physiol. 232: 650–664, 2017. © 2016 The Authors. Journal of Cellular Physiology published by Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Wakako Tsuchida
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Aichi, Japan.,Program in Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Aichi, Japan
| | - Masahiro Iwata
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Aichi, Japan.,Program in Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Aichi, Japan
| | - Takayuki Akimoto
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan
| | - Shingo Matsuo
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Aichi, Japan.,Program in Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Aichi, Japan
| | - Yuji Asai
- Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Aichi, Japan
| | - Shigeyuki Suzuki
- Program in Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Aichi, Japan
| |
Collapse
|
29
|
Matsumoto M, Ozaki Y, Kubota H, Asai Y, Kanamori H. Equivalent Spatial Frequency and Optimum Film Densities for the Perceptibility of Radiographic Contrast of Step-Edge images. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/00223638.1995.11738627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
30
|
Asai Y, Minagawa A, Koga H, Okuyama R. Pigmented macule on the nipple. Clin Exp Dermatol 2015; 40:938-40. [PMID: 25808092 DOI: 10.1111/ced.12647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/31/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Y Asai
- Department of Dermatology, Shinshu University School of Medicine, Asahi, Japan
| | - A Minagawa
- Department of Dermatology, Shinshu University School of Medicine, Asahi, Japan
| | - H Koga
- Department of Dermatology, Shinshu University School of Medicine, Asahi, Japan
| | - R Okuyama
- Department of Dermatology, Shinshu University School of Medicine, Asahi, Japan
| |
Collapse
|
31
|
Lavine E, Clarke A, Joseph L, Shand G, Alizadehfar R, Asai Y, Chan ES, Harada L, Allen M, Ben-Shoshan M. Peanut avoidance and peanut allergy diagnosis in siblings of peanut allergic children. Clin Exp Allergy 2014; 45:249-54. [DOI: 10.1111/cea.12403] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 08/11/2014] [Accepted: 08/18/2014] [Indexed: 11/27/2022]
Affiliation(s)
- E. Lavine
- Department of Pediatrics; Humber River Hospital; Toronto ON Canada
| | - A. Clarke
- Department of Medicine; Division of Rheumatology; University of Calgary; Calgary AB Canada
| | - L. Joseph
- Department of Medicine; Division of Clinical Epidemiology; McGill University Health Centre; Montreal QC Canada
- Department of Epidemiology and Biostatistics; McGill University; Montreal QC Canada
| | - G. Shand
- Department of Medicine; Division of Clinical Epidemiology; McGill University Health Centre; Montreal QC Canada
| | - R. Alizadehfar
- Department of Pediatrics; Division of Pediatric Allergy and Clinical Immunology; McGill University Health Centre; Montreal QC Canada
| | - Y. Asai
- Department of Medicine; Division of Dermatology; McGill University Health Centre; Montreal QC Canada
| | - E. S. Chan
- Department of Pediatrics; Division of Allergy and Immunology; University of British Columbia; Vancouver BC Canada
| | - L. Harada
- Anaphylaxis Canada; Toronto ON Canada
| | - M. Allen
- Allergy Asthma Information Association; Toronto ON Canada
| | - M. Ben-Shoshan
- Department of Pediatrics; Division of Pediatric Allergy and Clinical Immunology; McGill University Health Centre; Montreal QC Canada
| |
Collapse
|
32
|
Matsumoto K, Okumura M, Asai Y, Shimomura K, Tamura M, Nishimura Y. Statistical Process Control for EPID Dosimetry in the Quality Assurance of IMRT. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2477] [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] [Indexed: 10/24/2022]
|
33
|
Matsuo S, Suzuki S, Iwata M, Banno Y, Asai Y, Tsuchida W, Inoue T. Acute effects of different stretching durations on passive torque, mobility, and isometric muscle force. J Strength Cond Res 2014; 27:3367-76. [PMID: 23524367 DOI: 10.1519/jsc.0b013e318290c26f] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Static stretching is widely applied in various disciplines. However, the acute effects of different durations of stretching are unclear. Therefore, this study was designed to investigate the acute effects of different stretching durations on muscle function and flexibility, and provide an insight into the optimal duration of static stretching. This randomized crossover trial included 24 healthy students (17 men and 7 women) who stretched their right hamstrings for durations of 20, 60, 180, and 300 seconds in a random order. The following outcomes were assessed using an isokinetic dynamometer as markers of lower-limb function and flexibility: static passive torque (SPT), dynamic passive torque (DPT), stiffness, straight leg raise (SLR), and isometric muscle force. Static passive torque was significantly decreased after all stretching durations (p < 0.05). Static passive torque was significantly lower after 60, 180, and 300 seconds of stretching compared with that after 20-second stretching, and stiffness decreased significantly after 180- and 300-second stretching (p < 0.05). In addition, DPT and stiffness were significantly lower after 300 seconds than after 20-second stretching (p < 0.05), and SLR increased significantly after all stretching durations (p < 0.05). Straight leg raise was higher after 180- and 300-second stretching than after 20-second stretching and higher after 300-second stretching than after 60-second stretching (p < 0.05). Isometric muscle force significantly decreased after all stretching durations (p < 0.05). Therefore, increased duration of stretching is associated with a decrease in SPT but an increase in SLR. Over 180 seconds of stretching was required to decrease DPT and stiffness, but isometric muscle force decreased regardless of the stretching duration. In conclusion, these results indicate that longer durations of stretching are needed to provide better flexibility.
Collapse
Affiliation(s)
- Shingo Matsuo
- 1Program in Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Japan; 2Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan; and 3Department of Rehabilitation, Nagoya University Hospital, Nagoya, Japan
| | | | | | | | | | | | | |
Collapse
|
34
|
Hochstadter E, Clarke A, LaVieille S, Alizadehfar R, Mill C, Asai Y, Eisman H, Ben-Shoshan M. 205: C-Care: Comparing Two Years of Anaphylaxis in a Canadian Pediatric Emergency Department. Paediatr Child Health 2014. [DOI: 10.1093/pch/19.6.e35-200] [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] [Indexed: 11/14/2022] Open
|
35
|
Chad L, Ben-Shoshan M, Asai Y, Cherkaoui S, Alizadehfar R, St-Pierre Y, Harada L, Allen M, Clarke A. A majority of parents of children with peanut allergy fear using the epinephrine auto-injector. Allergy 2013; 68:1605-9. [PMID: 24410784 DOI: 10.1111/all.12262] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2013] [Indexed: 11/28/2022]
Abstract
Prompt epinephrine administration is crucial in managing anaphylaxis, but epinephrine auto-injectors (EAIs) are underutilized by patients and their families. Children with peanut allergy were recruited from the Allergy Clinics at the Montreal Children's Hospital, food allergy advocacy organizations and organizations providing products to allergic individuals. Parents of children who had been prescribed an EAI were queried on whether they were fearful of using it and on factors that may contribute to fear. A majority of parents (672/1209 = 56%) expressed fear regarding the use of the EAI. Parents attributed the fear to hurting the child, using the EAI incorrectly or a bad outcome. Parents whose child had longer disease duration or a severe reaction and parents who were satisfied with the EAI training or found it easy to use were less likely to be afraid. Families may benefit from simulation training and more education on the recognition and management of anaphylaxis.
Collapse
Affiliation(s)
- L. Chad
- Department of Paediatrics; University of Toronto; Toronto ON Canada
| | - M. Ben-Shoshan
- Division of Pediatric Allergy and Clinical Immunology; Department of Pediatrics; McGill University Health Centre; Montreal QC Canada
| | - Y. Asai
- Division of Dermatology; Department of Medicine; McGill University Health Centre; Montreal QC Canada
| | - S. Cherkaoui
- Department of Medicine; University of Montreal; Montreal QC Canada
| | - R. Alizadehfar
- Division of Pediatric Allergy and Clinical Immunology; Department of Pediatrics; McGill University Health Centre; Montreal QC Canada
| | - Y. St-Pierre
- Division of Clinical Epidemiology; Department of Medicine; McGill University Health Center; Montreal QC Canada
| | - L. Harada
- Anaphylaxis Canada; Toronto ON Canada
| | - M. Allen
- Allergy Asthma Information Association; Toronto ON Canada
| | - A. Clarke
- Division of Clinical Epidemiology; Department of Medicine; McGill University Health Center; Montreal QC Canada
- Division of Clinical Immunology and Allergy; Department of Medicine; McGill University Health Center; Montreal QC Canada
| |
Collapse
|
36
|
Matsumoto T, Fujita M, Hirano R, Tashiro N, Asai Y, Fukuyama S, Morimoto Y, Nakanishi Y, Watanabe K. P11 The role of chronic infection by Pseudomonas aeruginosa in the COPD pathogenesis in CCSP-deficient mice. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70256-5] [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] [Indexed: 10/26/2022]
|
37
|
Asai Y, Kawai T, Ohtake M, Futamoto M. Crystallographic and magnetostriction properties of Fe and FeB-alloy thin films formed on MgO(100) single-crystal substrates. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134017001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
38
|
Kawai T, Asai Y, Ohtake M, Takeda S, Futamoto M. Dynamic magnetic properties of Fe70Co30(100) single-crystal thin films deposited at various substrate temperatures. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134013001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
39
|
Maekawa K, Tanno K, Hase M, Mori K, Asai Y. Survival after out-of-hospital cardiac arrest during nights and weekends. Crit Care 2012. [PMCID: PMC3363687 DOI: 10.1186/cc10876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
40
|
Kan-O K, Matsumoto K, Inoue H, Fukuyama S, Asai Y, Watanabe W, Kurokawa M, Araya J, Kuwano K, Nakanishi Y. Corticosteroids plus long-acting β2-agonists prevent double-stranded RNA-induced upregulation of B7-H1 on airway epithelium. Int Arch Allergy Immunol 2012; 160:27-36. [PMID: 22948082 DOI: 10.1159/000338430] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 03/23/2012] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Airway viral infections provoke exacerbations of asthma and chronic obstructive pulmonary disease. B7-H1 is a costimulatory molecule that is implicated in an escape mechanism of viruses from host immune systems. This escape may be associated with the persistence of viral infection and lead to exacerbation of underlying diseases. We have shown that an analog of viral double-stranded RNA, polyinosinic-polycytidylic acid (poly IC), upregulated the expression of B7-H1 on airway epithelial cells, an effect which was corticosteroid-resistant. We investigated the effects of corticosteroids plus long-acting β(2)-agonists (LABAs; fluticasone/salmeterol or budesonide/formoterol) on the expression of B7-H1. METHODS BEAS-2B cells and primary airway epithelial cells were stimulated with poly IC or respiratory syncytial virus. The expression of B7-H1 was assessed by flow cytometry. RESULTS Poly IC upregulated the expression of B7-H1, which was suppressed by high-concentration corticosteroids but not by LABAs. The upregulation was suppressed by very low-concentration corticosteroids when used in combination with LABAs. Their combination also suppressed the virus-induced upregulation of B7-H1. Poly IC stimulation induced the nuclear translocation of nuclear factor ĸB (NF-ĸB). Inhibitors of NF-ĸB activation prevented the poly IC-induced upregulation of B7-H1. Low-concentration corticosteroids in combination with LABAs enhanced the de novo induction of IĸBα, the endogenous inhibitor of NF-ĸB activation. CONCLUSIONS Fluticasone/salmeterol or budesonide/formoterol attenuate the virus-associated upregulation of B7-H1 on airway epithelial cells via suppression of NF-ĸB activation.
Collapse
Affiliation(s)
- K Kan-O
- Research Institute for Diseases of the Chest, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Oikawa Y, Katsuki T, Kawasaki M, Hashiguchi A, Mukai K, Handa K, Tomita M, Kabeya Y, Asai Y, Iwase K, Hirose S, Koyama K, Atsumi Y, Shimada A. Insulinoma may mask the existence of Type 1 diabetes. Diabet Med 2012; 29:e138-41. [PMID: 22356209 DOI: 10.1111/j.1464-5491.2012.03615.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Insulinoma is a tumour of insulin-producing cells of the pancreas and is known to be one of the causes of hypoglycaemia. Usually, appropriate removal of the insulinoma results in normalization of blood glucose levels. However, we found novel cases of insulinoma, in which hyperglycaemia developed soon after resection of the insulinoma. CASE REPORT We encountered two patients with repeated hypoglycaemia caused by insulinoma. Following removal of the insulinoma, unanticipated hyperglycaemia was observed in both patients. Thereafter, their blood tests revealed low levels of serum C-peptide and high titres of anti-glutamic acid decarboxylase antibody, indicating concomitant Type 1 diabetes. Indeed, histological examination of the resected specimen revealed that one patient showed insulitis in non-tumorous pancreatic tissue in which β-cells had already disappeared. Moreover, inflammatory cells infiltrated the insulinoma, as if it were insulitis of Type 1 diabetes, suggesting the existence of anti-islet autoimmunity. CONCLUSION These are first cases of insulinoma associated with underlying Type 1 diabetes. Physicians should be aware of the possibility that insulinoma may mask Type 1 diabetes, and measurement of anti-islet autoantibodies may be helpful to find underlying Type 1 diabetes, such as in these cases. It is pathologically interesting that the immune cell infiltration into insulinoma may be suggestive of anti-islet autoimmunity.
Collapse
Affiliation(s)
- Y Oikawa
- Department of Internal Medicine, Saiseikai Central Hospital, Tokyo, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Matsumoto K, Otsuka M, Shimomura K, Asai Y, Okumura M, Tamura M, Nishimura Y. EP-1447 COMPREHENSIVE LINEAR ACCELERATOR QA USING COMMERCIAL ANALYTIC SOFTWARE APLICATION. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71780-2] [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] [Indexed: 10/28/2022]
|
43
|
Asai Y, Sugita T, Kato R, Okochi M, Nakagawa K, Honda H. Enhancement of the Activity of a Lactobacilli-Aggregating Peptide by Freezing Treatment. J Chem Eng Japan / JCEJ 2012. [DOI: 10.1252/jcej.12we086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yuji Asai
- Department of Biotechnology, Graduate School of Engineering, Nagoya University
| | - Tomoya Sugita
- Department of Biotechnology, Graduate School of Engineering, Nagoya University
| | - Ryuji Kato
- Department of Biotechnology, Graduate School of Engineering, Nagoya University
| | - Mina Okochi
- Department of Biotechnology, Graduate School of Engineering, Nagoya University
| | - Kyuya Nakagawa
- Department of Mechanical and System Engineering, University of Hyogo
| | - Hiroyuki Honda
- Department of Biotechnology, Graduate School of Engineering, Nagoya University
| |
Collapse
|
44
|
Nishi T, Nishimura Y, Shibata T, Tamura M, Asai Y, Okumura M. Dosimetric Evaluation of Two-step Method as Adaptive Replanning Strategies for Head and Neck IMRT. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1457] [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] [Indexed: 10/16/2022]
|
45
|
Maekawa K, Sawamoto K, Uemura S, Tanno K, Mori K, Asai Y. 281 Rapidly Degradable Hydroxyethyl Starch Solutions Increase the Risk of Massive Transfusion in Blunt Trauma Patients. Ann Emerg Med 2011. [DOI: 10.1016/j.annemergmed.2011.06.311] [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] [Indexed: 10/17/2022]
|
46
|
Naito M, Asai Y, Mori A, Kuwabara M, Okamoto A, Katase S, Hishida A, Morita E, Kawai S, Okada R, Wakai K, Hamajima N. P2-212 Association between the RANK polymorphism and the number of teeth among Japanese. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976j.45] [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] [Indexed: 11/04/2022]
|
47
|
Morimoto H, Asai Y, Johnson EG, Lohman EB, Khoo K, Mizutani Y, Mizutani T. Effect of oculo-motor and gaze stability exercises on postural stability and dynamic visual acuity in healthy young adults. Gait Posture 2011; 33:600-3. [PMID: 21334899 DOI: 10.1016/j.gaitpost.2011.01.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Revised: 11/23/2010] [Accepted: 01/23/2011] [Indexed: 02/02/2023]
Abstract
The purpose of this study was to investigate the effectiveness of oculo-motor exercises and gaze stability exercises on postural stability and dynamic visual acuity (DVA) in healthy young adults. Subjects were randomly divided into experimental (n=28) and control groups (n=13). The experimental group performed oculo-motor exercises and gaze stability exercise for three weeks and the control group did not. Pre and post postural stability during quiet standing, standing with active head rotation, and DVA were measured on both groups. Significant differences were found in postural stability during standing with active head rotation and DVA in the experimental group (p<0.05). No significant differences were found in postural stability or DVA in the control group. Improvements in postural stability and DVA after three weeks of oculo-motor exercises and gaze stability exercises suggest that this specific type of vestibular and ocular system exercises may be beneficial for healthy young adults.
Collapse
Affiliation(s)
- Hiroyuki Morimoto
- Department of Rehabilitation, Mizutani Hospital, Nagoya, Aichi, Japan.
| | | | | | | | | | | | | |
Collapse
|
48
|
Sakamoto T, Asai Y, Nagao K, Yokota H, Tahara Y, Morimura N, Atsumi T, Nara S, Hase M. Extracorporeal cardiopulmonary resuscitation for out-of-hospital cardiac arrest. Resuscitation 2010. [DOI: 10.1016/j.resuscitation.2010.09.258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
49
|
Maekawa K, Sawamoto K, Uemura S, Tanno K, Hase M, Mori K, Asai Y. 78: Time to Esophageal Obturator Airways Placement by Emergency Medical Technicians-Basic and Survival After Out-of-Hospital Cardiac Arrest. Ann Emerg Med 2010. [DOI: 10.1016/j.annemergmed.2010.06.121] [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] [Indexed: 10/19/2022]
|
50
|
Matsui A, Ohmura H, Asai Y, Takahashi T, Hiraga A, Okamura K, Tokimura H, Sugino T, Obitsu T, Taniguchi K. Effect of amino acid and glucose administration following exercise on the turnover of muscle protein in the hindlimb femoral region of Thoroughbreds. Equine Vet J 2010:611-6. [PMID: 17402492 DOI: 10.1111/j.2042-3306.2006.tb05613.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
REASONS FOR PERFORMING STUDY In man, muscle protein synthesis is accelerated by administering amino acids (AA) and glucose (Glu), because increased availability of amino acids and increased insulin secretion, is known to have a protein anabolic effect. However, in the horse, the effect on muscle hypertrophy of such nutrition management following exercise is unknown. OBJECTIVES To determine the effect of AA and Glu administration following exercise on muscle protein turnover in horses. We hypothesise that administration of AA and Glu after exercise effects muscle hypertrophy in horses, as already shown in man and other animals. METHODS Measurements of the rate of synthesis (Rs) and rate of degradation (Rd) of muscle protein in the hindlimb femoral region of thoroughbred horses were conducted using the isotope dilution method to assess the differences between the artery and iliac vein. Six adult Thoroughbreds received a continuous infusion of L-[ring-2H5]- phenylalanine during the study, the stable period for plasma isotope concentrations (60 min), resting periods (60 min), treadmill exercise (15 min) and recovery period (240 min). All horses were given 4 solutions (saline [Cont], 10% AA [10-AA], 10% Glu [10-Glu] and a mixture with 10% AA and 10% Glu [10-Mix]) over 120 min after exercise, and the Rs and Rd of muscle protein in the hindlimb measured. RESULTS The average Rs during the 75-120 min following administration of 10-Mix was significantly greater than for the other solutions (P<0.05). The second most effective solution was 10-AA, and there was no change in Rs after 10-Glu. CONCLUSIONS Administration of AA following exercise accelerated Rs in the hindlimb femoral region, and this effect was enhanced when combined with glucose, because of increasing insulin secretion or a decreased requirement for AA for energy. POTENTIAL RELEVANCE Further studies are required regarding the effect on muscle hypertrophy of supplementing amino acids and glucose in the feed of exercising horses.
Collapse
Affiliation(s)
- A Matsui
- Equine Science Division, Hidaka Training and Research Center, Japan Racing Association, Urakawa-gun, Hokkaido, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|