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Proctor DN, Neely KA, Mookerjee S, Tucker J, Somani YB, Flanagan M, Kim-Shapiro DB, Basu S, Muller MD, Jin-Kwang Kim D. Inorganic nitrate supplementation and blood flow restricted exercise tolerance in post-menopausal women. Nitric Oxide 2022; 122-123:26-34. [PMID: 35240317 PMCID: PMC9062890 DOI: 10.1016/j.niox.2022.02.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/12/2022] [Accepted: 02/25/2022] [Indexed: 11/17/2022]
Abstract
Exercise tolerance appears to benefit most from dietary nitrate (NO3-) supplementation when muscle oxygen (O2) availability is low. Using a double-blind, randomized cross-over design, we tested the hypothesis that acute NO3- supplementation would improve blood flow restricted exercise duration in post-menopausal women, a population with reduced endogenous nitric oxide bioavailability. Thirteen women (57-76 yr) performed rhythmic isometric handgrip contractions (10% MVC, 30 per min) during progressive forearm blood flow restriction (upper arm cuff gradually inflated 20 mmHg each min) on three study visits, with 7-10 days between visits. Approximately one week following the first (familiarization) visit, participants consumed 140 ml of NO3- concentrated (9.7 mmol, 0.6 gm NO3-) or NO3-depleted beetroot juice (placebo) on separate days (≥7 days apart), with handgrip exercise beginning 100 min post-consumption. Handgrip force recordings were analyzed to determine if NO3- supplementation enhanced force development as blood flow restriction progressed. Nitrate supplementation increased plasma NO3- (16.2-fold) and NO2- (4.2-fold) and time to volitional fatigue (61.8 ± 56.5 s longer duration vs. placebo visit; p = 0.03). Nitrate supplementation increased the rate of force development as forearm muscle ischemia progressed (p = 0.023 between 50 and 75% of time to fatigue) with non-significant effects thereafter (p = 0.052). No effects of nitrate supplementation were observed for mean duration of contraction or relaxation rates (all p > 0.150). These results suggest that acute NO3- supplementation prolongs time-to-fatigue and speeds grip force development during progressive forearm muscle ischemia in postmenopausal women.
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Affiliation(s)
- David N Proctor
- Penn State University, University Park, PA, USA; Penn State College of Medicine, Hershey, PA, USA.
| | | | | | | | | | - Michael Flanagan
- Penn State College of Medicine, Hershey, PA, USA; Penn State Health Family and Community Medicine, University Park, PA, USA
| | | | - Swati Basu
- Wake Forest University, Winston-Salem, NC, USA
| | - Matthew D Muller
- University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Danielle Jin-Kwang Kim
- Penn State University, University Park, PA, USA; Penn State College of Medicine, Hershey, PA, USA
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Calcium Fluxes in Work-Related Muscle Disorder: Implications from a Rat Model. BIOMED RESEARCH INTERNATIONAL 2019; 2019:5040818. [PMID: 31662979 PMCID: PMC6791278 DOI: 10.1155/2019/5040818] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 08/13/2019] [Accepted: 08/20/2019] [Indexed: 01/16/2023]
Abstract
Introduction Ca2+ regulatory excitation-contraction coupling properties are key topics of interest in the development of work-related muscle myalgia and may constitute an underlying cause of muscle pain and loss of force generating capacity. Method A well-established rat model of high repetition high force (HRHF) work was used to investigate if such exposure leads to an increase in cytosolic Ca2+ concentration ([Ca2+]i) and changes in sarcoplasmic reticulum (SR) vesicle Ca2+ uptake and release rates. Result Six weeks exposure of rats to HRHF increased indicators of fatigue, pain behaviors, and [Ca2+]i, the latter implied by around 50-100% increases in pCam, as well as in the Ca2+ handling proteins RyR1 and Casq1 accompanied by an ∼10% increased SR Ca2+ uptake rate in extensor and flexor muscles compared to those of control rats. This demonstrated a work-related altered myocellular Ca2+ regulation, SR Ca2+ handling, and SR protein expression. Discussion These disturbances may mirror intracellular changes in early stages of human work-related myalgic muscle. Increased uptake of Ca2+ into the SR may reflect an early adaptation to avoid a sustained detrimental increase in [Ca2+]i similar to the previous findings of deteriorated Ca2+ regulation and impaired function in fatigued human muscle.
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De Meulemeester K, Calders P, De Pauw R, Grymonpon I, Govaerts A, Cagnie B. Morphological and physiological differences in the upper trapezius muscle in patients with work-related trapezius myalgia compared to healthy controls: A systematic review. Musculoskelet Sci Pract 2017; 29:43-51. [PMID: 28315581 DOI: 10.1016/j.msksp.2017.02.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 02/17/2017] [Accepted: 02/24/2017] [Indexed: 10/20/2022]
Abstract
BACKGROUND Trapezius myalgia is a common musculoskeletal complaint, characterized by pain, stiffness and tightness of the upper trapezius muscle. It is often work-related and caused by prolonged static and repetitive work tasks. It is hypothesized that this leads to various morphological and physiological alterations in muscle tissue but the pathophysiology is poorly understood. These alterations can be investigated by analysing muscle biopsies in order to reveal the underlying cellular mechanisms. OBJECTIVES This systematic review aimed at providing a summary of the existing literature regarding morphological and physiological differences between people with work-related trapezius myalgia and healthy controls, obtained by analysing muscle biopsies. DESIGN Systematic review. METHODS A systematic literature search was performed in following databases: Pubmed, Web of Science and Embase by using different keyword combinations. This systematic review is reported following the PRISMA guidelines. RESULTS Generally, low to moderate evidence was found for the absence of differences in muscle morphology in people with trapezius myalgia, compared to healthy controls. However, significant differences were mainly found in comparison with the control group with another occupation than the myalgic group. It can thus be hypothesized that morphological alterations in muscle tissue are related to work load and not to pain. Low to moderate evidence was also found for the absence of differences at the physiological level. CONCLUSIONS Based on this systematic review, there are no clear differences in muscle morphology and physiology between subjects with trapezius myalgia and healthy controls.
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Affiliation(s)
- Kayleigh De Meulemeester
- Department of Rehabilitation Sciences and Physiotherapy, Ghent University, De Pintelaan 185 3B3, Ghent 9000, Belgium.
| | - Patrick Calders
- Department of Rehabilitation Sciences and Physiotherapy, Ghent University, De Pintelaan 185 3B3, Ghent 9000, Belgium.
| | - Robby De Pauw
- Department of Rehabilitation Sciences and Physiotherapy, Ghent University, De Pintelaan 185 3B3, Ghent 9000, Belgium.
| | - Ine Grymonpon
- Department of Rehabilitation Sciences and Physiotherapy, Ghent University, De Pintelaan 185 3B3, Ghent 9000, Belgium.
| | - Anke Govaerts
- Department of Rehabilitation Sciences and Physiotherapy, Ghent University, De Pintelaan 185 3B3, Ghent 9000, Belgium.
| | - Barbara Cagnie
- Department of Rehabilitation Sciences and Physiotherapy, Ghent University, De Pintelaan 185 3B3, Ghent 9000, Belgium.
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Green HJ, Ranney D, Kyle N, Lounsbury D, Smith IC, Stewart R, Thomas MM, Tick H, Tupling AR. Neuromuscular manifestations of work-related myalgia in women specific to extensor carpi radialis brevis. Can J Physiol Pharmacol 2017; 95:404-419. [PMID: 28177692 DOI: 10.1139/cjpp-2016-0080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study assessed neuromuscular function in the extensor carpi radialis brevis (ECRB) of female workers diagnosed with work-related myalgia (WRM, n = 14, age 45.2 ± 1.9 years) and the ECRB of healthy controls (CON, n = 10, age 34.6 ± 2.5 years). Groups were compared on voluntary and electrically evoked functional responses at rest (Pre), immediately following a 5 min repetitive task (Post-0) performed at 60% maximal voluntary contraction (MVC), and after 5 min of recovery (Post-5). Despite near complete motor unit activation (MUA) (CON 98% ± 1% vs. WRM 99% ± 1%), at Pre, WRM produced 26% less (P < 0.05) MVC force than CON. Following an MVC, twitch force was increased (P < 0.05) by 94% ± 13% and 54% ± 11% in CON and WRM, respectively (CON vs. WRM; P < 0.05). The peak force and the maximal rates of force development and decline of electrically evoked contractions (10-100 Hz) were generally depressed (P < 0.05) at Post-0 and Post-5 relative to Pre. The response pattern to increasing frequencies of stimulation was not different (P > 0.05) between groups and MUA was not impaired (CON 97% ± 1% vs. WRM 97% ± 1%; P > 0.05). In conclusion, the peripheral weakness observed in the ECRB in WRM at rest does not result in abnormal fatigue or recovery responses after performing a task controlled for relative demand (60% MVC).
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Affiliation(s)
- Howard J Green
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada.,b Centre of Research Expertise for the Prevention of Musculoskeletal Disorders (CRE-MSD), Waterloo, ON N2L 3G1, Canada
| | - Don Ranney
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada.,d Disability Assessment Services Inc., Waterloo, ON N2B 1Y4, Canada
| | - Natasha Kyle
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - David Lounsbury
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Ian C Smith
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Riley Stewart
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Melissa M Thomas
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Heather Tick
- c Mind Body Medicine, The RSI Clinic, Toronto, ON M4T 1M6, Canada.,e Department of Anaesthesiology and Pain Medicine, University of Washington, Seattle, WA 98195, USA
| | - A Russell Tupling
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
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Green HJ, Ranney D, Burnett M, Iqbal S, Kyle N, Lounsbury D, Ouyang J, Tupling AR, Smith IC, Stewart R, Tick H. Cellular properties of extensor carpi radialis brevis and trapezius muscles in healthy males and females. Can J Physiol Pharmacol 2015; 93:953-66. [PMID: 26502178 DOI: 10.1139/cjpp-2014-0549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In this study, we sought to determine whether differences in cellular properties associated with energy homeostasis could explain the higher incidence of work-related myalgia in trapezius (TRAP) compared with extensor carpi radialis brevis (ECRB). Tissue samples were obtained from the ECRB (n = 19) and TRAP (n = 17) of healthy males and females (age 27.9 ± 2.2 and 28.1 ± 1.5 years, respectively; mean ± SE) and analyzed for properties involved in both ATP supply and utilization. The concentration of ATP and the maximal activities of creatine phosphokinase, phosphorylase, and phosphofructokinase were higher (P < 0.05) in ECRB than TRAP. Succinic dehydrogenase, citrate synthase, and cytochrome c oxidase were not different between muscles. The ECRB also displayed a higher concentration of Na(+)-K(+)-ATPase and greater sarcoplasmic reticulum Ca(2+) release and uptake. No differences existed between muscles for either monocarboxylate transporters or glucose transporters. It is concluded that the potentials for high-energy phosphate transfer, glycogenolysis, glycolysis, and excitation-contraction coupling are higher in ECRB than TRAP. Histochemical measurements indicated that the muscle differences are, in part, related to differing amounts of type II tissue. Depending on the task demands, the TRAP may experience a greater metabolic and excitation-contraction coupling strain than the ECRB given the differences observed.
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Affiliation(s)
- Howard J Green
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada.,b Centre for Research Expertise for the Prevention of Musculoskeletal Disorders (CRE-MSD), Waterloo, Ontario, Canada
| | - Don Ranney
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada.,b Centre for Research Expertise for the Prevention of Musculoskeletal Disorders (CRE-MSD), Waterloo, Ontario, Canada.,c Disability Assessment Services Inc., Waterloo, Ontario, Canada
| | - Margaret Burnett
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Sobia Iqbal
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Natasha Kyle
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - David Lounsbury
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Jing Ouyang
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - A Russell Tupling
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Ian C Smith
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Riley Stewart
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Heather Tick
- d Mind Body Medicine, The RSI Clinic, Toronto, Ontario, Canada.,e Departments of Family Medicine and Anaesthesiology & Pain Medicine, University of Washington, Seattle, Washington, USA
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Green HJ, Ranney D, Burnett M, Galvin P, Kyle N, Lounsbury D, Ouyang J, Smith IC, Stewart R, Tick H, Tupling AR. Preliminary observations on high energy phosphates and metabolic pathway and transporter potentials in extensor carpi radialis brevis and trapezius muscles of women with work-related myalgia. Can J Physiol Pharmacol 2014; 92:953-60. [PMID: 25358071 DOI: 10.1139/cjpp-2014-0218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This study compared both the extensor carpi radialis brevis (ECRB) and the trapezius (TRAP) muscles of women with work-related myalgia (WRM) with healthy controls (CON) to determine whether abnormalities existed in cellular energy status and the potentials of the various metabolic pathways and segments involved in energy production and substrate transport. For both the ECRB (CON, n = 6-9; WRM, n = 13) and the TRAP (CON, n = 6-7; WRM, n = 10), no differences (P > 0.05) were found for the concentrations (in millimoles per kilogram of dry mass) of ATP, PCr, lactate, and glycogen. Similarly, with one exception, the maximal activities (in moles per milligram of protein per hour) of mitochondrial enzymes representative of the citric acid cycle (CAC), the electron transport chain (ETC), and β-oxidation, as well as the cytosolic enzymes involved in high energy phosphate transfer, glycogenolysis, glycolysis, lactate oxidation, and glucose phosphorylation were not different (P > 0.05). The glucose transporters GLUT1 and GLUT4, and the monocarboxylate transporters MCT1 and MCT4, were also normal in WRM. It is concluded that, in general, abnormalities in the resting energy and substrate state, the potential of the different metabolic pathways and segments, as well as the glucose and monocarboxylate transporters do not appear to be involved in the cellular pathophysiology of WRM.
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Affiliation(s)
- Howard J Green
- a Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
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