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Silva de Sousa JC, Torriani-Pasin C, de Moraes Forjaz CL. Reproducibility (reliability and agreement) of ventilatory threshold and peak responses during cardiopulmonary exercise test in people with stroke. Top Stroke Rehabil 2024; 31:117-124. [PMID: 37210739 DOI: 10.1080/10749357.2023.2214756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 05/12/2023] [Indexed: 05/23/2023]
Abstract
BACKGROUND A cardiopulmonary exercise test (CPET) is used to determine the ventilatory thresholds and to directly assess cardiorespiratory capacity. However, its reproducibility should be tested in people with stroke as sequelae imposed by the stroke may induce important variations among and within each subject, affecting the reproducibility of the physiological responses to CPET. PURPOSE This cross-sectional repeated measures study design aims to determine the reproducibility of anaerobic threshold (AT), respiratory compensation point (RCP), and maximal cardiorespiratory capacity assessed during a CPET in people with stroke. METHODS Twenty-eight subjects with hemiparesis after stroke aging 60 ± 13 years were submitted to two treadmill CPETs with identical protocols. DATA ANALYSIS The reproducibility of heart rate (HR) and oxygen consumption (VO2) obtained at AT, RCP, and peak effort was evaluated by systematic error (paired t-test); reliability (ICC and 95% confidence interval); and agreement (typical error and coefficient of variation). RESULTS There were no systematic errors for HR and VO2assessed at AT, RCP, and peak effort (p > 0,05). Reliability was high for these variables during CPET (ICCs > 0.93). Agreement was good for all variables. Typical errors for HR and VO2 assessed at AT, RCP, and peak effort were, respectively, 7, 7, and 8 bpm, and 1.51, 1.44, and 1.57 ml.kg-1.min-1. Coefficients of variation assessed at AT, RCP, and peak effort were, respectively, 5.7, 5.1, and 6.0% for HR and 8.7, 7.3, and 7.5% for VO2. CONCLUSIONS HR and VO2 measured at AT, RCP, and peak effort during a treadmill CPET present good reproducibility in people with stroke, showing high reliability and good agreement.
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Affiliation(s)
- Julio Cesar Silva de Sousa
- Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, SP, Brazil
| | - Camila Torriani-Pasin
- Motor Behavior Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, SP, Brazil
- Department of Physical Therapy and Movement Sciences, The University of Texas El Paso, El Paso, TX, USA
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Reitz KM, Althouse AD, Forman DE, Zuckerbraun BS, Vodovotz Y, Zamora R, Raffai RL, Hall DE, Tzeng E. MetfOrmin BenefIts Lower Extremities with Intermittent Claudication (MOBILE IC): randomized clinical trial protocol. BMC Cardiovasc Disord 2023; 23:38. [PMID: 36681798 PMCID: PMC9862509 DOI: 10.1186/s12872-023-03047-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 01/05/2023] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Peripheral artery disease (PAD) affects over 230 million people worldwide and is due to systemic atherosclerosis with etiology linked to chronic inflammation, hypertension, and smoking status. PAD is associated with walking impairment and mobility loss as well as a high prevalence of coronary and cerebrovascular disease. Intermittent claudication (IC) is the classic presenting symptom for PAD, although many patients are asymptomatic or have atypical presentations. Few effective medical therapies are available, while surgical and exercise therapies lack durability. Metformin, the most frequently prescribed oral medication for Type 2 diabetes, has salient anti-inflammatory and promitochondrial properties. We hypothesize that metformin will improve function, retard the progression of PAD, and improve systemic inflammation and mitochondrial function in non-diabetic patients with IC. METHODS 200 non-diabetic Veterans with IC will be randomized 1:1 to 180-day treatment with metformin extended release (1000 mg/day) or placebo to evaluate the effect of metformin on functional status, PAD progression, cardiovascular disease events, and systemic inflammation. The primary outcome is 180-day maximum walking distance on the 6-min walk test (6MWT). Secondary outcomes include additional assessments of functional status (cardiopulmonary exercise testing, grip strength, Walking Impairment Questionnaires), health related quality of life (SF-36, VascuQoL), macro- and micro-vascular assessment of lower extremity blood flow (ankle brachial indices, pulse volume recording, EndoPAT), cardiovascular events (amputations, interventions, major adverse cardiac events, all-cause mortality), and measures of systemic inflammation. All outcomes will be assessed at baseline, 90 and 180 days of study drug exposure, and 180 days following cessation of study drug. We will evaluate the primary outcome with linear mixed-effects model analysis with covariate adjustment for baseline 6MWT, age, baseline ankle brachial indices, and smoking status following an intention to treat protocol. DISCUSSION MOBILE IC is uniquely suited to evaluate the use of metformin to improve both systematic inflammatory responses, cellular energetics, and functional outcomes in patients with PAD and IC. TRIAL REGISTRATION The prospective MOBILE IC trial was publicly registered (NCT05132439) November 24, 2021.
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Affiliation(s)
- Katherine M Reitz
- Department of Surgery, University of Pittsburgh, South Tower, Rm 351.6, 200 Lothrop Street, Pittsburgh, PA, 15213, USA
- Division of Vascular Surgery, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Surgery, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA
| | | | - Daniel E Forman
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
- Geriatrics Research, Education, and Clinical Care, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA
| | - Brian S Zuckerbraun
- Department of Surgery, University of Pittsburgh, South Tower, Rm 351.6, 200 Lothrop Street, Pittsburgh, PA, 15213, USA
- Department of Surgery, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA
- School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Yoram Vodovotz
- Department of Surgery, University of Pittsburgh, South Tower, Rm 351.6, 200 Lothrop Street, Pittsburgh, PA, 15213, USA
- Center for Inflammation and Regeneration Modeling, McGowan Institute for Regenerative Medicine, Pittsburgh, PA, USA
- Center for Systems Immunology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Ruben Zamora
- Department of Surgery, University of Pittsburgh, South Tower, Rm 351.6, 200 Lothrop Street, Pittsburgh, PA, 15213, USA
| | | | - Daniel E Hall
- Department of Surgery, University of Pittsburgh, South Tower, Rm 351.6, 200 Lothrop Street, Pittsburgh, PA, 15213, USA
- Department of Surgery, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA
- School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
- Geriatrics Research, Education, and Clinical Care, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA
- Wolff Center, UPMC, Pittsburgh, PA, USA
- Center for Health Equity Research and Promotion, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA
| | - Edith Tzeng
- Department of Surgery, University of Pittsburgh, South Tower, Rm 351.6, 200 Lothrop Street, Pittsburgh, PA, 15213, USA.
- Division of Vascular Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
- Department of Surgery, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA.
- School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA.
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da Silva ND, Andrade-Lima A, Chehuen MR, Leicht AS, Brum PC, Oliveira EM, Wolosker N, Pelozin BRA, Fernandes T, Forjaz CLM. Walking Training Increases microRNA-126 Expression and Muscle Capillarization in Patients with Peripheral Artery Disease. Genes (Basel) 2022; 14:genes14010101. [PMID: 36672843 PMCID: PMC9858623 DOI: 10.3390/genes14010101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/20/2022] [Accepted: 12/20/2022] [Indexed: 12/31/2022] Open
Abstract
Patients with peripheral artery disease (PAD) have reduced muscle capillary density. Walking training (WT) is recommended for PAD patients. The goal of the study was to verify whether WT promotes angiogenesis in PAD-affected muscle and to investigate the possible role of miRNA-126 and the vascular endothelium growth factor (VEGF) angiogenic pathways on this adaptation. Thirty-two men with PAD were randomly allocated to two groups: WT (n = 16, 2 sessions/week) and control (CO, n = 16). Maximal treadmill tests and gastrocnemius biopsies were performed at baseline and after 12 weeks. Histological and molecular analyses were performed by blinded researchers. Maximal walking capacity increased by 65% with WT. WT increased the gastrocnemius capillary-fiber ratio (WT = 109 ± 13 vs. 164 ± 21 and CO = 100 ± 8 vs. 106 ± 6%, p < 0.001). Muscular expression of miRNA-126 and VEGF increased with WT (WT = 101 ± 13 vs. 130 ± 5 and CO = 100 ± 14 vs. 77 ± 20%, p < 0.001; WT = 103 ± 28 vs. 153 ± 59 and CO = 100 ± 36 vs. 84 ± 41%, p = 0.001, respectively), while expression of PI3KR2 decreased (WT = 97 ± 23 vs. 75 ± 21 and CO = 100 ± 29 vs. 105 ± 39%, p = 0.021). WT promoted angiogenesis in the muscle affected by PAD, and miRNA-126 may have a role in this adaptation by inhibiting PI3KR2, enabling the progression of the VEGF signaling pathway.
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Affiliation(s)
- Natan D. da Silva
- Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo 05508-900, Brazil
- Correspondence: ; Tel.: +55-1130918792
| | - Aluisio Andrade-Lima
- Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo 05508-900, Brazil
| | - Marcel R. Chehuen
- Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo 05508-900, Brazil
| | - Anthony S. Leicht
- Sport & Exercise Science, James Cook University, Townsville, QLD 4811, Australia
| | - Patricia C. Brum
- Cellular Molecular Exercise Physiology Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo 05508-900, Brazil
| | - Edilamar M. Oliveira
- Laboratory of the Biochemistry and Molecular Biology of Exercise, School of Physical Education and Sport, University of São Paulo, São Paulo 05508-900, Brazil
| | - Nelson Wolosker
- Albert Einstein Israelite Hospital, São Paulo 05652-900, Brazil
| | - Bruno R. A. Pelozin
- Laboratory of the Biochemistry and Molecular Biology of Exercise, School of Physical Education and Sport, University of São Paulo, São Paulo 05508-900, Brazil
| | - Tiago Fernandes
- Laboratory of the Biochemistry and Molecular Biology of Exercise, School of Physical Education and Sport, University of São Paulo, São Paulo 05508-900, Brazil
| | - Cláudia L. M. Forjaz
- Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo 05508-900, Brazil
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Andrade-Lima A, Silva Junior N, Chehuen M, Miyasato R, Souza RWA, Leicht AS, Brum PC, de Oliveira EM, Wolosker N, Forjaz CLM. Walking Training Improves Systemic and Local Pathophysiological Processes in Intermittent Claudication. Eur J Vasc Endovasc Surg 2021; 61:954-963. [PMID: 33875324 DOI: 10.1016/j.ejvs.2021.02.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 01/25/2021] [Accepted: 02/16/2021] [Indexed: 12/12/2022]
Abstract
OBJECTIVE This study examined the impact of submaximal walking training (WT) on local and systemic nitric oxide (NO) bioavailability, inflammation, and oxidative stress in patients with intermittent claudication (IC). METHODS The study employed a randomised, controlled, parallel group design and was performed in a single centre. Thirty-two men with IC were randomly allocated to two groups: WT (n = 16, two sessions/week, 15 cycles of two minutes walking at an intensity corresponding to the heart rate obtained at the pain threshold interspersed by two minutes of upright rest) and control (CO, n = 16, two sessions/week, 30 minutes of stretching). NO bioavailability (blood NO and muscle nitric oxide synthase [eNOS]), redox homeostasis (catalase [CAT], superoxide dismutase [SOD], lipid peroxidation [LPO] measured in blood and muscle), and inflammation (interleukin-6 [IL-6], C-reactive protein [CRP], tumour necrosis factor α [TNF-α], intercellular adhesion molecules [ICAM], vascular adhesion molecules [VCAM] measured in blood and muscle) were assessed at baseline and after 12 weeks. RESULTS WT statistically significantly increased blood NO, muscle eNOS, blood SOD and CAT, and muscle SOD and abolished the increase in circulating and muscle LPO observed in the CO group. WT decreased blood CRP, ICAM, and VCAM and muscle IL-6 and CRP and eliminated the increase in blood TNF-α and muscle TNF-α, ICAM and VCAM observed in the CO group. CONCLUSION WT at an intensity of pain threshold improved NO bioavailability and decreased systemic and local oxidative stress and inflammation in patients with IC. The proposed WT protocol provides physiological adaptations that may contribute to cardiovascular health in these patients.
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Affiliation(s)
- Aluisio Andrade-Lima
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil.
| | - Natan Silva Junior
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | - Marcel Chehuen
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | - Roberto Miyasato
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | - Rodrigo W A Souza
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | - Anthony S Leicht
- Sport & Exercise Science, James Cook University, Townsville, Australia
| | - Patricia C Brum
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | | | | | - Claudia L M Forjaz
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
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Berg OK, Paulsberg F, Brabant C, Arabsolghar K, Ronglan S, Bjørnsen N, Tørhaug T, Granviken F, Gismervik S, Hoff J. High-Intensity Shoulder Abduction Exercise in Subacromial Pain Syndrome. Med Sci Sports Exerc 2021; 53:1-9. [PMID: 32555026 DOI: 10.1249/mss.0000000000002436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Subacromial pain syndrome (SAPS) defined as pain of nontraumatic origin localized around the acromion, is a debilitating, common, and often chronic condition. Among many proposed underlying causes of SAPS, hypoperfusion and hypoxic conditions in and around the tendons may be an intrinsic cause of SAPS. PURPOSE This study aimed to determine if adding high-intensity aerobic interval training (HIIT) of the rotator cuff to usual care was feasible in SAPS and improved shoulder endurance more than usual care alone, as well as to examine the influence on shoulder pain and disability and the response of tendinous microcirculation after HIIT. METHODS Twenty-one subjects with chronic SAPS were randomized to two groups: experimental group (EG; n = 13) receiving HIIT in addition to treatment as usual and control group (CG; n = 8) receiving treatment as usual. Before and after 8 wk of exercise therapy, endurance performance was assessed by an incremental abduction exercise of the arm to exhaustion (TTE). Pain and disability was assessed by the shoulder pain and disability index (SPADI). Contrast-enhanced ultrasound of the musculus supraspinatus and tendon was utilized to indicate tendon blood flow. RESULTS Endurance in the TTE test improved by an estimated 233 s more on average in EG than in CG (P = 0.001; 95% confidence interval, 102 to 363). The SPADI score was reduced 22 points more on average in EG (P = 0.017; 95% confidence interval, -40 to -5). The change from pretest to posttest was significant in EG for both TTE test and SPADI improvement (P < 0.001). EG also experienced less pain during exercise after the intervention compared with CG (P < 0.001). Contrast-enhanced ultrasound indicated an increase in tendinous blood flow in EG (P = 0.019). CONCLUSIONS HIIT rotator cuff exercise seems to be a feasible intervention in SAPS, increasing endurance performance more than usual care alone.
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Affiliation(s)
- Ole Kristian Berg
- Faculty of Health and Social Sciences, Molde University College, Molde, NORWAY
| | | | | | - Keyvan Arabsolghar
- Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, NORWAY
| | - Sigrid Ronglan
- Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, NORWAY
| | - Nina Bjørnsen
- Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, NORWAY
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Duscha BD, Kraus WE, Jones WS, Robbins JL, Piner LW, Huffman KM, Allen JD, Annex BH. Skeletal muscle capillary density is related to anaerobic threshold and claudication in peripheral artery disease. Vasc Med 2020; 25:411-418. [PMID: 32841100 DOI: 10.1177/1358863x20945794] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Peripheral artery disease (PAD) is characterized by impaired blood flow to the lower extremities, causing claudication and exercise intolerance. Exercise intolerance may result from reduced skeletal muscle capillary density and impaired muscle oxygen delivery. This cross-sectional study tested the hypothesis that capillary density is related to claudication times and anaerobic threshold (AT) in patients with PAD. A total of 37 patients with PAD and 29 control subjects performed cardiopulmonary exercise testing on a treadmill for AT and gastrocnemius muscle biopsies. Skeletal muscle capillary density was measured using immunofluorescence staining. PAD had decreased capillary density (278 ± 87 vs 331 ± 86 endothelial cells/mm2, p = 0.05), peak VO2 (15.7 ± 3.9 vs 24.3 ± 5.2 mL/kg/min, p ⩽ 0.001), and VO2 at AT (11.5 ± 2.6 vs 16.1 ± 2.8 mL/kg/min, p ⩽ 0.001) compared to control subjects. In patients with PAD, but not control subjects, capillary density was related to VO2 at AT (r = 0.343; p = 0.038), time to AT (r = 0.381; p = 0.020), and time after AT to test termination (r = 0.610; p ⩽ 0.001). Capillary density was also related to time to claudication (r = 0.332; p = 0.038) and time after claudication to test termination (r = 0.584; p ⩽ 0.001). In conclusion, relationships between capillary density, AT, and claudication symptoms indicate that, in PAD, exercise limitations are likely partially dependent on limited skeletal muscle capillary density and oxidative metabolism.
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Affiliation(s)
- Brian D Duscha
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
| | - William E Kraus
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
- Division of Cardiology, Duke University School of Medicine, Durham, NC, USA
| | - William S Jones
- Division of Cardiology, Duke University School of Medicine, Durham, NC, USA
| | - Jennifer L Robbins
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
| | - Lucy W Piner
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
| | - Kim M Huffman
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
| | - Jason D Allen
- Department of Kinesiology, Curry School of Education and Human Development, University of Virginia, Charlottesville, VA, USA
- Division of Cardiovascular Medicine, School of Medicine, University of Virginia, Charlottesville, VA, USA
| | - Brian H Annex
- Department of Medicine, Medical College of Georgia, Augusta, GA, USA
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