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Fan Y, Ji X, Zhang L, Zhang X. The Analgesic Effects of Static Magnetic Fields. Bioelectromagnetics 2021; 42:115-127. [PMID: 33508148 DOI: 10.1002/bem.22323] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 12/17/2020] [Accepted: 01/02/2021] [Indexed: 11/09/2022]
Abstract
Pain is one of the most common reasons why people seek medical care, which is related to most disease states. Magnetic fields (MFs) can be applied locally to specific parts of human bodies with high penetration and temporal control, which have a long-debated history in folk therapy. The purpose of this review is to collect and analyze experimental data about the analgesic effects of static magnetic fields (SMFs) so that we can have a scientific understanding regarding this topic. We collected 28 studies (25 English and 3 Chinese papers) with proper sham controls that investigated the effects of SMFs on pain relief in humans or mice. We found that 64% of the human studies and all mice studies in the literature showed positive analgesic effects of SMFs, which are related to factors including SMF intensity, treatment time, and pain types. Higher intensity and/or longer treatment time, as well as some specific pain types, may have better pain relief effects. Initial mechanistic studies indicated that membrane receptors, such as capsaicin receptor VR1/TRPV1, opioid receptors, and P2X3 receptors, might be involved. By describing experimental evidence and analysis, we found that SMFs actually hold considerable promise for managing some specific types of pain if proper SMF parameters are used. More studies comprehensively evaluating the parameters of SMF and its corresponding analgesic effects on different pain types, as well as the underlying molecular mechanisms, will be necessary to further validate its therapeutic potential in pain management in the future. Bioelectromagnetics. 00:00-00, 2021. © 2021 Bioelectromagnetics Society.
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Affiliation(s)
- Yixiang Fan
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
- Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, China
| | - Xinmiao Ji
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
| | - Lei Zhang
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
| | - Xin Zhang
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
- Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, China
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, China
- International Magnetobiology Frontier Research Center (iMFRC), Science Island, Hefei, China
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Hurst P, Schipof-Godart L, Szabo A, Raglin J, Hettinga F, Roelands B, Lane A, Foad A, Coleman D, Beedie C. The Placebo and Nocebo effect on sports performance: A systematic review. Eur J Sport Sci 2019; 20:279-292. [DOI: 10.1080/17461391.2019.1655098] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Philip Hurst
- School of Human and Life Sciences, Canterbury Christ Church University, Canterbury, UK
| | - Lieke Schipof-Godart
- Faculty of Health, Nutrition & Sports, The Hague University of Applied Sciences, Hague, Netherlands
| | - Attila Szabo
- Institute of Health Promotion and Sports Sciences, Eötvös Loránd University, Budapest, Hungary
| | - John Raglin
- School of Public Health, Indiana University, Bloomington, IN, USA
| | - Florentina Hettinga
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle upon Tyne, UK
| | - Bart Roelands
- Department of Human Physiology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Andrew Lane
- Faculty of Education Health and Wellbeing, Institute of Sport, University of Wolverhampton, Walsall, UK
| | - Abby Foad
- School of Human and Life Sciences, Canterbury Christ Church University, Canterbury, UK
| | - Damian Coleman
- School of Human and Life Sciences, Canterbury Christ Church University, Canterbury, UK
| | - Chris Beedie
- School of Psychology, University of Kent, Canterbury, UK
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Kamm K, Pomschar A, Ruscheweyh R, Straube A, Reiser MF, Hernádi I, László JF, Ertl-Wagner B. Static magnetic field exposure in 1.5 and 3 Tesla MR scanners does not influence pain and touch perception in healthy volunteers. Eur J Pain 2018; 23:250-259. [DOI: 10.1002/ejp.1299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 07/25/2018] [Accepted: 07/29/2018] [Indexed: 11/05/2022]
Affiliation(s)
- Katharina Kamm
- Department of Neurology; Ludwig-Maximilians-University Hospital; Munich Germany
| | - Andreas Pomschar
- Department of Radiology; Ludwig-Maximilians-University Hospital; Munich Germany
| | - Ruth Ruscheweyh
- Department of Neurology; Ludwig-Maximilians-University Hospital; Munich Germany
| | - Andreas Straube
- Department of Neurology; Ludwig-Maximilians-University Hospital; Munich Germany
| | | | - Istvan Hernádi
- Center for Neuroscience; Department of Experimental Neurobiology and Szentagothai Research Center; University of Pécs; Pécs Hungary
| | - Janos F. László
- Department of Computer Science; University of Debrecen; Debrecen Hungary
| | - Birgit Ertl-Wagner
- Department of Radiology; Ludwig-Maximilians-University Hospital; Munich Germany
- Department of Radiology; The Hospital for Sick Children; University of Toronto; Toronto Canada
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Głąb G, Dudek J, Klimek K, Skalska-Dulińska B, Urszula Chrabota U, Chojak-Fijałka K, Ridan T, Glodzik J. Static or dynamic low-frequency magnetic field?
A review of literature. REHABILITACJA MEDYCZNA 2016. [DOI: 10.5604/01.3001.0009.4809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The therapeutic application of magnetic fi elds has experienced signifi cant growth in recent years. A small number of contraindications,
as well as the lack of side effects makes both permanent magnets and alternating magnetic fi elds frequently used in
physical therapy practice. In a signifi cant number of clinical studies the effi cacy of this physical factor as both an independent
method, as well as supporting treatment programs has been confi rmed. In the last few years, a lot of emphasis is put on the
fact that all therapeutic methods should have a scientifi c basis and their usage should meet the evidence based medicine criteria
(EBM). Therefore, this work will focus on comparison of the use of permanent magnets and alternating low-frequency
magnetic fi eld on the basis of the available literature, including mainly, a randomized double-blind trial. Analysis of the available
literature on permanent magnet usage has shown clinical effi cacy in many diseases, however, placebo-controlled studies
confi rm mainly the analgesic effect in patients after liposuction surgery, with diabetic neuropathy and with chronic pelvic pain.
The use of the alternating low-frequency magnetic fi eld also leaves many questions to which scientists have still not found the
answer. Randomized double-blind trial proved its therapeutic effi cacy in patients after knee arthroscopy, fractures and delayed
bone unions, knee and cervical spine osteoarthritis as well as in case of leg ulceration. Alternating magnetic fi eld application
has a wider therapeutic range in comparison to permanent magnets and its effectiveness is much better documented, both in
clinical studies as well as randomized double-blind trials.
Cite this article as: Głąb G., Dudek J., Klimek K., Skalska-Dulińska B., Chrabota U., Chojak-Fijałka K., Ridan T., Glodzik J. Static or dynamic low-frequency magnetic field? A review of literature. Med Rehabil 2016; 20(2): 31-35.
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Affiliation(s)
- Grzegorz Głąb
- University of Physical Education, Krakow, Poland Faculty of Motor Rehabilitation Department of Biomedical Medicine and Biomedical Renewal, Department of Physiotherapy,
| | - Jolanta Dudek
- Jan Kochanowski University, Kielce, Poland Faculty of Medicine and Health Sciences Department of Physical Medicine, Institute of Physiotherapy
| | - Krzysztof Klimek
- University of Physical Education, Krakow, Poland Faculty of Motor Rehabilitation Department of Biomedical Medicine and Biomedical Renewal, Department of Physiotherapy
| | | | - Urszula Urszula Chrabota
- University of Physical Education, Krakow, Poland Faculty of Motor Rehabilitation Department of Biomedical Medicine and Biomedical Renewal, Department of Physiotherapy
| | - Katarzyna Chojak-Fijałka
- University of Physical Education, Krakow, Poland Faculty of Motor Rehabilitation Department of Biomedical Medicine and Biomedical Renewal, Department of Physiotherapy
| | | | - Jacek Glodzik
- University of Physical Education, Krakow, Poland Faculty of Motor Rehabilitation Department of Biomedical Medicine and Biomedical Renewal, Department of Physiotherapy
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Dommerholt J, Hooks T, Finnegan M, Grieve R. A critical overview of the current myofascial pain literature - March 2016. J Bodyw Mov Ther 2016; 20:397-408. [PMID: 27210859 DOI: 10.1016/j.jbmt.2016.02.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The worldwide interest in myofascial pain syndrome (MPS) and trigger points (TrPs) is reflected in the increasing number of publications. In this overview of the literature, we included 26 studies, case reports and review articles by authors from 18 different countries. Several research groups are exploring the characteristic of TrPs such as Chen and colleagues, who continued their work on the quantification of the taut bands. Meng and colleagues studied the relationships between TrPs and central sensitization, while Yu and colleagues examined the electrophysiological characteristics that occur as a result of active TrPs. Several researchers used objective measurements to determine clinical outcomes, such as Koppenhaver and colleagues who measured objective changes in the function and nociceptive sensitivity of lumbar multifidus muscle subjects with low back pain. Turo and colleagues quantified muscle tissue changes after dry needling in chronic myofascial pain using elastography. Multiple studies explored various treatment options for TrPs, such as dry needling, injections with lidocaine or granisetron, traditional Thai massage, self-myofascial release, kinesiotaping, and monochromatic infrared photo energy, among others.
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Affiliation(s)
- Jan Dommerholt
- Bethesda Physiocare, Bethesda, MD, USA; Myopain Seminars, Bethesda, MD, USA.
| | - Todd Hooks
- New Orleans Pelicans, New Orleans, LA, USA.
| | - Michelle Finnegan
- Bethesda Physiocare, Bethesda, MD, USA; Myopain Seminars, Bethesda, MD, USA.
| | - Rob Grieve
- Department of Allied Health Professions, Faculty of Health and Applied Sciences, University of the West of England, Blackberry Hill, Bristol, United Kingdom.
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Gatterer H, Peters P, Philippe M, Burtscher M. The effect of pulsating electrostatic field application on the development of delayed onset of muscle soreness (DOMS) symptoms after eccentric exercise. J Phys Ther Sci 2015; 27:3105-7. [PMID: 26644654 PMCID: PMC4668145 DOI: 10.1589/jpts.27.3105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 07/09/2015] [Indexed: 11/24/2022] Open
Abstract
[Purpose] The aim of the study was to establish whether pulsating electrostatic field application, shown to increase blood flow and metabolic activity and to function as an ion pump, is able to reduce muscle pain after exercise-induced muscle damage. [Subjects and Methods] Seven participants (4 males, 3 females) performed two sessions of downhill running separated by at least 4 weeks. After the running sessions, participants were either treated for 45 min with a pulsating electrostatic field (field intensity, 9000 V; current, <9 mA; frequency, 50 Hz) or a sham treatment. The order of the intervention was random, and the condition was blinded for the participants. Muscle soreness score, creatine kinase, and jump ability were assessed before and up to 48 hours after running. [Results] Twenty-four and 48 hours after the downhill running, the muscle soreness score tended to be less increased after pulsating electrostatic field administration when compared with the sham setting (changes in muscle soreness score: 3.7±1.6 vs. 5.7±2.2 after 24 h and 3.1±2.0 vs. 5.4±3.2 after 48 h, respectively). No further differences were detected. [Conclusion] The outcomes show that a pulsating electrostatic field might be a promising treatment to reduce muscle soreness after exercise-induced muscle damage. However, further studies are needed to confirm the present outcomes and to establish the mechanism by which a pulsating electrostatic field may reduce muscle pain.
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Affiliation(s)
- Hannes Gatterer
- Department of Sport Science, University of Innsbruck, Austria
| | - Philippe Peters
- Department of Sport Science, University of Innsbruck, Austria
| | - Marc Philippe
- Department of Sport Science, University of Innsbruck, Austria
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Jeon HS, Kang SY, Park JH, Lee HS. Effects of pulsed electromagnetic field therapy on delayed-onset muscle soreness in biceps brachii. Phys Ther Sport 2015; 16:34-9. [DOI: 10.1016/j.ptsp.2014.02.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 02/13/2014] [Accepted: 02/20/2014] [Indexed: 01/03/2023]
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Mészáros S, Tabák AG, Horváth C, Szathmári M, László JF. Influence of local exposure to static magnetic field on pain perception and bone turnover of osteoporotic patients with vertebral deformity – a randomized controlled trial. Int J Radiat Biol 2013; 89:877-85. [DOI: 10.3109/09553002.2013.800249] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Dawson KA, Dawson L, Thomas A, Tiidus PM. Effectiveness of regular proactive massage therapy for novice recreational runners. Phys Ther Sport 2011; 12:182-7. [PMID: 22085712 DOI: 10.1016/j.ptsp.2011.02.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2010] [Revised: 02/24/2011] [Accepted: 02/25/2011] [Indexed: 11/20/2022]
Abstract
OBJECTIVES To assess effects of a regular massage program on novice runners over a longer-term training period. PARTICIPANTS Twelve control and sixteen massage subjects took part in the study. SETTING Both groups participated in 10-week running preparation clinics. DESIGN An individualized massage treatment plan was developed for each massage group participant. Massage group subjects met weekly with a registered massage therapist for a half hour massage. Control subjects were given no massage treatments. MAIN OUTCOME MEASURES All participants maintained a running journal that recorded running behavior: frequency, distance, intensity, and pain. At weeks 1, 5, and 10, muscle strength, leg pain, daily functioning, and running confidence were assessed. RESULTS The running behavior of both groups was similar (p > 0.05). Both groups experienced a considerable amount of pain when they ran. However, 100% of the massage group compared to 58.3% of control group completed the 10 km race. CONCLUSIONS A regular massage therapy program during training did not improve indices of muscle strength, pain perception, daily functioning or running confidence. However, the entire massage group met their targeted running goals while only half of the control was able to do so however this difference may not be attributable to the massage intervention.
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Affiliation(s)
- Kimberley A Dawson
- Department of Kinesiology & Physical Education, Wilfrid Laurier University & Waterloo Sport Medicine, Waterloo, ON, Canada N2L3C5
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Ulku R, Akdag MZ, Erdogan S, Akkus Z, Dasdag S. Extremely low-frequency magnetic field decreased calcium, zinc and magnesium levels in costa of rat. Biol Trace Elem Res 2011; 143:359-67. [PMID: 20872091 DOI: 10.1007/s12011-010-8855-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2010] [Accepted: 09/09/2010] [Indexed: 01/15/2023]
Abstract
Electromagnetic field (EMF) can affect cells due to biochemical change followed by a change in level of ions trafficking through membrane. We aimed to investigate possible changes in some elements in costa of rats exposed to long-term extremely low-frequency magnetic field (ELF-MF). Rats were exposed to 100 and 500 μT ELF-MF, which are the safety standards of public and occupational exposure for 2 h/day during 10 months. At the end of the exposure period, the samples of costa were taken from the rats exposed to ELF-MF and sham. The levels of elements were measured by using atomic absorption spectrophotometry (AAS) and ultraviolet (UV) spectrophotometry. Ca levels decreased in the ELF-500 exposure group in comparison to sham group (p < 0.05). Statistically significant decrease was found in Mg levels in the ELF-500 exposure group in comparison to sham and ELF-100 exposure groups (p < 0.05). Zn levels were found to be lower in the ELF-500 exposure group than those in the sham and ELF-100 exposure groups (p < 0.05). No significant differences were determined between groups in terms of the levels of P, Cu and Fe. In conclusion, it can be maintained that long-term ELF-MF exposure can affect the chemical structure and metabolism of bone by changing the levels of some important elements such as Ca, Zn and Mg in rats.
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Affiliation(s)
- Refik Ulku
- Department of Chest Surgery, Medical School of Dicle University, Diyarbakir, Turkey
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Abstract
BACKGROUND Magnetic and electromagnetic fields have been accepted as real physical entities in medicine and are believed to achieve pain relief. Magnetic field therapy has been acknowledged as a non-invasive, safe and simple method for treatment of the site of injury, source of pain or inflammation, or other types of illnesses and pathologies. However, a consensus regarding the statistical relevance of the effects has not been established. MATERIALS AND METHODS A detailed literature research was performed and the results were evaluated. Inclusion criteria were that the studies had to be randomized, double-blind and placebo-controlled, and no additional forms of treatment other than magnetic effects were allowed to be used. RESULTS The evaluation of 17 studies with static magnetic fields showed on average no significant difference in pain relief between the group treated with magnetic fields and the placebo group. All studies using magnetic fields showed that forms of treatment conducted over a period of 30 min and at intervals of 1 week have no effects. In 10 studies with dynamic magnetic fields different effects were registered, which ranged from no effect to significant differences regarding pain relief between the treated and the control groups. CONCLUSIONS Static magnetic fields are ineffective with respect to pain therapy. Dynamic magnetic fields show diverse effects. Hence, this therapy should be researched in depth.
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Pulsed-Magnetic Field Therapy Does Not Influence Indices of Muscle Damage Following Eccentric Exercise: A Preliminary Study. ACTA ACUST UNITED AC 2010. [DOI: 10.2478/v10036-010-0032-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Hopker JG, Foad AJ, Beedie CJ, Coleman DA, Leach G. Placebo effect of an inert gel on experimentally induced leg muscle pain. Open Access J Sports Med 2010; 1:215-21. [PMID: 24198560 PMCID: PMC3781872 DOI: 10.2147/oajsm.s13564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose This study examined the therapeutic effects of an inert placebo gel on experimentally induced muscle pain in a sports therapy setting. It aimed to investigate the degree to which conditioned analgesia, coupled with an expectation of intervention, was a factor in subsequent analgesia. Methods Participants were sixteen male and eight female sports therapy students at a UK University. With institutional ethics board approval and following informed consent procedures, each was exposed to pain stimulus in the lower leg in five conditions, ie, conditioning, prebaseline, experimental (two placebo gel applications), and postbaseline. In conditioning trials, participants identified a level of pain stimulus equivalent to a perceived pain rating of 6/10. An inert placebo gel was then applied to the site with the explicit instruction that it was an analgesic. Participants were re-exposed to the pain stimulus, the level of which, without their knowledge, had been decreased, creating the impression of an analgesic effect resulting from the gel. In experimental conditions, the placebo gel was applied and the level of pain stimulus required to elicit a pain rating of 6/10 recorded. Results Following application of the placebo gel, the level of pain stimulus required to elicit a pain rating of 6/10 increased by 8.2%. Application of the placebo gel significantly decreased participant’s perceptions of muscle pain (P = 0.001). Conclusion Subjects’ experience and expectation of pain reduction may be major factors in the therapeutic process. These factors should be considered in the sports therapeutic environment.
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Affiliation(s)
- James G Hopker
- Centre for Sports Studies, University of Kent, Chatham, Kent, UK
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15
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Antal M, László J. Exposure to inhomogeneous static magnetic field ceases mechanical allodynia in neuropathic pain in mice. Bioelectromagnetics 2009; 30:438-45. [DOI: 10.1002/bem.20498] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
The placebo effect, with its central role in clinical trials, is acknowledged as a factor in sports medicine, although until recently little has been known about the likely magnitude and extent of the effect in any specific research setting. Even less is known about the prevalence of the effect in competitive sport. The present paper reviews 12 intervention studies in sports performance. All examine placebo effects associated with the administration of an inert substance believed by subjects to be an ergogenic aid. Placebo effects of varying magnitudes are reported in studies addressing sports from weightlifting to endurance cycling. Findings suggest that psychological variables such as motivation, expectancy and conditioning, and the interaction of these variables with physiological variables, might be significant factors in driving both positive and negative outcomes. Programmatic research involving the triangulation of data, and investigation of contextual and personality factors in the mediation of placebo responses may help to advance knowledge in this area.
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Pulse low-intensity electromagnetic field as prophylaxis of heterotopic ossification in patients with traumatic spinal cord injury. VOJNOSANIT PREGL 2009; 66:22-8. [PMID: 19195259 DOI: 10.2298/vsp0901022d] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND/AIM Heterotopic ossification (HO) is an important complication of head and spinal cord injuries (SCI). Pulse low-intensity electromagnetic field (PLIMF) therapy increases blood flow to an area of pain or inflammation, bringing more oxygen to that area and helps to remove toxic substances. The aim of this study was to determine the effect of PLIMF as prophylaxis of HO in patients with SCI. METHODS This prospective random control clinical study included 29 patients with traumatic SCI. The patients were randomly divided into experimental (n=14) and control group (n=15). The patients in the experimental group, besides exercise and range of motion therapy, were treated by PLIMF of the following characteristics: induction of 10 mT, frequency of 25 Hz and duration of 30 min. Pulse low-intensity electromagnetic field therapy started in the 7th week after the injury and lasted 4 weeks. The presence or absence of HO around the patients hips we checked by a plane radiography and Brookers classification. Functional capabilities and motor impairment were checked by Functional Independent Measure (FIM), Barthel index and American Spinal Injury Association (ASIA) impairment class. Statistic analysis included Kolmogorov-Smimrnov test, Shapiro-Wilk test, Mann Whitney Exact test, Exact Wilcoxon signed rank test and Fischer Exact test. Statistical significance was set up to p<0.05. RESULTS At the end of the treatment no patient from the experimental group had HO. In the control group, five patients (33.3%) had HO. At the end of the treatment the majority of the patients from the experimental group (57.14%) moved from ASIA-A to ASIA-B class. CONCLUSION Pulse low-intensity electromagnetic field therapy could help as prophylaxis of HO in patients with traumatic SCI.
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Colbert AP, Souder J, Markov M. Static magnetic field therapy: methodological challenges to conducting clinical trials. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/s10669-008-9203-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Colbert AP, Markov MS, Souder JS. Static magnetic field therapy: dosimetry considerations. J Altern Complement Med 2008; 14:577-82. [PMID: 18532897 DOI: 10.1089/acm.2007.0827] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The widespread use of static magnetic field (SMF) therapy as a self-care physical intervention has led to the conduct of numerous randomized controlled trials (RCTs). A recent systematic review of SMF trials for pain reduction concluded that the evidence does not support the use of permanent magnets for pain relief. We argue that this conclusion is unwarranted if the SMF dosage was inadequate or inappropriate for the clinical condition treated. The purpose of this communication is to (1) provide a rationale and an explanation for each of 10 essential SMF dosing parameters that should be considered when conducting trials of SMF therapy, and (2) advocate for the conduct of Phase I studies to optimize SMF dosimetry for each condition prior to implementing a large-scale RCT. A previous critical review of SMF dosimetry in 56 clinical studies found that reporting SMF dosages in a majority of those studies was of such poor quality that the magnetic field exposure at the target tissue could not be characterized. Without knowing what magnetic field actually reached the target, it is impossible to judge dosage adequacy. In order to quantify SMF exposure at the site of pathology (target tissue/s), that site must be clearly named; the distance of the permanent magnet surface from the target must be delineated; the physical parameters of the applied permanent magnet must be described; and the dosing regimen must be precisely reported. If the SMF dosimetry is inadequate, any inferences drawn from reported negative findings are questionable.
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Affiliation(s)
- Agatha P Colbert
- Helfgott Research Institute, National College of Natural Medicine, Portland, OR 97201, USA.
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Colbert AP, Wahbeh H, Harling N, Connelly E, Schiffke HC, Forsten C, Gregory WL, Markov MS, Souder JJ, Elmer P, King V. Static magnetic field therapy: a critical review of treatment parameters. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2007; 6:133-9. [PMID: 18955243 PMCID: PMC2686626 DOI: 10.1093/ecam/nem131] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Static magnetic field (SMF) therapy, applied via a permanent magnet attached to the skin, is used by people worldwide for self-care. Despite a lack of established SMF dosage and treatment regimens, multiple studies are conducted to evaluate SMF therapy effectiveness. Our objectives in conducting this review are to:(i) summarize SMF research conducted in humans; (ii) critically evaluate reporting quality of SMF dosages and treatment parameters and (iii) propose a set of criteria for reporting SMF treatment parameters in future clinical trials. We searched 27 electronic databases and reference lists. Only English language human studies were included. Excluded were studies of electromagnetic fields, transcranial magnetic stimulation, magnets placed on acupuncture points, animal studies, abstracts, posters and editorials. Data were extracted on clinical indication, study design and 10 essential SMF parameters. Three reviewers assessed quality of reporting and calculated a quality assessment score for each of the 10 treatment parameters. Fifty-six studies were reviewed, 42 conducted in patient populations and 14 in healthy volunteers. The SMF treatment parameters most often and most completely described were site of application, magnet support device and frequency and duration of application. Least often and least completely described were characteristics of the SMF: magnet dimensions, measured field strength and estimated distance of the magnet from the target tissue. Thirty-four (61%) of studies failed to provide enough detail about SMF dosage to permit protocol replication by other investigators. Our findings highlight the need to optimize SMF dosing parameters for individual clinical conditions before proceeding to a full-scale clinical trial.
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Affiliation(s)
- Agatha P Colbert
- Helfgott Research Institute, National College of Natural Medicine, 049 SW, Porter Street, Portland, OR 97291, USA.
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Pittler MH, Brown EM, Ernst E. Static magnets for reducing pain: systematic review and meta-analysis of randomized trials. CMAJ 2007; 177:736-42. [PMID: 17893349 PMCID: PMC1976658 DOI: 10.1503/cmaj.061344] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Static magnets are marketed with claims of effectiveness for reducing pain, although evidence of scientific principles or biological mechanisms to support such claims is limited. We performed a systematic review and meta-analysis to assess the clinical evidence from randomized trials of static magnets for treating pain. METHODS Systematic literature searches were conducted from inception to March 2007 for the following data sources: MEDLINE, EMBASE, AMED (Allied and Complementary Medicine Database), CINAHL, Scopus, the Cochrane Library and the UK National Research Register. All randomized clinical trials of static magnets for treating pain from any cause were considered. Trials were included only if they involved a placebo control or a weak magnet as the control, with pain as an outcome measure. The mean change in pain, as measured on a 100-mm visual analogue scale, was defined as the primary outcome and was used to assess the difference between static magnets and placebo. RESULTS Twenty-nine potentially relevant trials were identified. Nine randomized placebo-controlled trials assessing pain with a visual analogue scale were included in the main meta-analysis; analysis of these trials suggested no significant difference in pain reduction (weighted mean difference [on a 100-mm visual analogue scale] 2.1 mm, 95% confidence interval -1.8 to 5.9 mm, p = 0.29). This result was corroborated by sensitivity analyses excluding trials of acute effects and conditions other than musculoskeletal conditions. Analysis of trials that assessed pain with different scales suggested significant heterogeneity among the trials, which means that pooling these data is unreliable. INTERPRETATION The evidence does not support the use of static magnets for pain relief, and therefore magnets cannot be recommended as an effective treatment. For osteoarthritis, the evidence is insufficient to exclude a clinically important benefit, which creates an opportunity for further investigation.
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Affiliation(s)
- Max H Pittler
- Complementary Medicine, Peninsula Medical School, Universities of Exeter and Plymouth, Exeter, UK.
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Sándor K, Helyes Z, Gyires K, Szolcsányi J, László J. Static magnetic field-induced anti-nociceptive effect and the involvement of capsaicin-sensitive sensory nerves in this mechanism. Life Sci 2007; 81:97-102. [PMID: 17568617 DOI: 10.1016/j.lfs.2007.04.029] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Revised: 04/05/2007] [Accepted: 04/17/2007] [Indexed: 10/23/2022]
Abstract
Data concerning the effect of static magnetic field (SMF) on nociceptive processes are contradictory in the literature probably due to differences in species, characteristics of the magnetic fields, and duration of the exposure. The aim of the present series of experiments was to elucidate the action of acute full-body exposure of mice to a special SMF developed and validated by us on acute visceral and somatic chemonociception and inflammatory mechanical hyperalgesia. SMF exposure significantly diminished the number of acetic acid- or MgSO4-induced abdominal contractions (acute visceral nociception), formalin-evoked paw lickings and liftings in both phase I (acute somatic nociception) and phase II (acute inflammatory nociception) and mechanical hyperalgesia evoked by i.pl. injection of carrageenan as well as the TRPV1 capsaicin receptor agonist resiniferatoxin. Selective inactivation of capsaicin-sensitive sensory fibres by high dose resiniferatoxin pretreatment decreased nocifensive behaviours in phase II of the formalin test to a similar extent suggesting that pro-inflammatory neuropeptides such as substance P and calcitonin gene-related peptide released from these fibres are involved in this inflammatory reaction. Significant inhibitory effects of SMF on formalin-induced nociception and carrageenan-evoked hyperalgesia were absent in resiniferatoxin-pretreated mice, which also points out that capsaicin-sensitive nerves are involved in the SMF-induced anti-nociceptive action.
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Affiliation(s)
- Katalin Sándor
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
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Coletti D, Teodori L, Albertini MC, Rocchi M, Pristerà A, Fini M, Molinaro M, Adamo S. Static magnetic fields enhance skeletal muscle differentiation in vitro by improving myoblast alignment. Cytometry A 2007; 71:846-56. [PMID: 17694560 DOI: 10.1002/cyto.a.20447] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Static magnetic field (SMF) interacts with mammal skeletal muscle; however, SMF effects on skeletal muscle cells are poorly investigated. The myogenic cell line L6, an in vitro model of muscle development, was used to investigate the effect of a 80 +/- mT SMF generated by a custom-made magnet. SMF promoted myogenic cell differentiation and hypertrophy, i.e., increased accumulation of actin and myosin and formation of large multinucleated myotubes. The elevated number of nuclei per myotube was derived from increased cell fusion efficiency, with no changes in cell proliferation upon SMF exposure. No alterations in myogenin expression, a modulator of myogenesis, occurred upon SMF exposure. SMF induced cells to align in parallel bundles, an orientation conserved throughout differentiation. SMF stimulated formation of actin stress-fiber like structures. SMF rescued muscle differentiation in the presence of TNF, a muscle differentiation inhibitor. We believe this is the first report showing that SMF promotes myogenic differentiation and cell alignment, in the absence of any invasive manipulation. SMF-enhanced parallel orientation of myotubes is relevant to tissue engineering of a highly organized tissue such as skeletal muscle. SMF rescue of muscle differentiation in the presence of TNF may have important therapeutic implications.
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Affiliation(s)
- Dario Coletti
- Department of Histology and Medical Embryology, Sapienza University, Rome, Italy
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