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Spencer L, Wright L, Foulkes SJ, Rowe SJ, Dillon HT, Climie R, Bigaran A, Janssens K, Mitchell A, Wallace I, Lindqvist A, Burnham L, Prior DL, Howden EJ, La Gerche A. Characterizing the influence of cardiorespiratory fitness on left atrial size and function in the general population. Am J Physiol Heart Circ Physiol 2024; 326:H1269-H1278. [PMID: 38457351 DOI: 10.1152/ajpheart.00422.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 02/26/2024] [Accepted: 03/07/2024] [Indexed: 03/10/2024]
Abstract
Increased left atrial (LA) size and reduced LA function have been associated with heart failure and atrial fibrillation (AF) in at-risk populations. However, atrial remodeling has also been associated with exercise training and the relationship between fitness, LA size, and function has not been defined across the fitness spectrum. In a cross-sectional study of 559 ostensibly healthy participants, comprising 304 males (mean age, 46 ± 20 yr) and 255 females (mean age, 47 ± 15 yr), we sought to define the relationship between cardiorespiratory fitness (CRF), LA size, and function. We also aimed to interrogate sex differences in atrial factors influencing CRF. Echocardiographic measures included biplane measures of LA volumes indexed to body surface area (LAVi) and atrial deformation using two-dimensional speckle tracking. CRF was measured as peak oxygen consumption (V̇o2peak) during cardiopulmonary exercise testing (CPET). Using multivariable regression, age, sex, weight, and LAVi (P < 0.001 for all) predicted V̇o2peak (P < 0.001, R2 = 0.66 for combined model). After accounting for these variables, heart rate reserve added strength to the model (P < 0.001, R2 = 0.74) but LA strain parameters did not predict V̇o2peak. These findings add important nuance to the perception that LA size is a marker of cardiac pathology. LA size should be considered in the context of fitness, and it is likely that the adverse prognostic associations of increased LA size may be confined to those with LA enlargement and low fitness.NEW & NOTEWORTHY Left atrial (LA) structure better predicts cardiorespiratory fitness (CRF) than LA function. LA function adds little statistical value to predictive models of peak oxygen uptake (V̇o2peak) in healthy individuals, suggesting limited discriminatory for CRF once LA size is factored. In the wider population of ostensibly healthy individuals, the association between increased LA volume and higher CRF provides an important counter to the association between atrial enlargement and heart failure symptoms in those with cardiac pathology.
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Affiliation(s)
- Luke Spencer
- St Vincent's Institute, Fitzroy, Victoria, Australia
- University of Melbourne, Parkville, Victoria, Australia
| | - Leah Wright
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | | | - Stephanie J Rowe
- St Vincent's Institute, Fitzroy, Victoria, Australia
- University of Melbourne, Parkville, Victoria, Australia
- Cardiology Department, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia
| | - Hayley T Dillon
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Deakin University, Geelong, Victoria, Australia
| | - Rachel Climie
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
| | | | - Kristel Janssens
- St Vincent's Institute, Fitzroy, Victoria, Australia
- Exercise and Nutrition Research Program, Mary MacKillop Institute for Health Research, Australian Catholic University, Fitzroy, Victoria, Australia
| | - Amy Mitchell
- St Vincent's Institute, Fitzroy, Victoria, Australia
| | - Imogen Wallace
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | | | - Lauren Burnham
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - David L Prior
- Cardiology Department, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia
| | - Erin J Howden
- University of Melbourne, Parkville, Victoria, Australia
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Andre La Gerche
- Cardiology Department, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia
- Victor Chang Cardiac Research Centre, Darlinghurst, New South Wales, Australia
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2
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Ninni S, Algalarrondo V, Brette F, Lemesle G, Fauconnier J. Left atrial cardiomyopathy: Pathophysiological insights, assessment methods and clinical implications. Arch Cardiovasc Dis 2024; 117:283-296. [PMID: 38490844 DOI: 10.1016/j.acvd.2024.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 02/01/2024] [Accepted: 02/06/2024] [Indexed: 03/17/2024]
Abstract
Atrial cardiomyopathy is defined as any complex of structural, architectural, contractile or electrophysiological changes affecting atria, with the potential to produce clinically relevant manifestations. Most of our knowledge about the mechanistic aspects of atrial cardiomyopathy is derived from studies investigating animal models of atrial fibrillation and atrial tissue samples obtained from individuals who have a history of atrial fibrillation. Several noninvasive tools have been reported to characterize atrial cardiomyopathy in patients, which may be relevant for predicting the risk of incident atrial fibrillation and its related outcomes, such as stroke. Here, we provide an overview of the pathophysiological mechanisms involved in atrial cardiomyopathy, and discuss the complex interplay of these mechanisms, including aging, left atrial pressure overload, metabolic disorders and genetic factors. We discuss clinical tools currently available to characterize atrial cardiomyopathy, including electrocardiograms, cardiac imaging and serum biomarkers. Finally, we discuss the clinical impact of atrial cardiomyopathy, and its potential role for predicting atrial fibrillation, stroke, heart failure and dementia. Overall, this review aims to highlight the critical need for a clinically relevant definition of atrial cardiomyopathy to improve treatment strategies.
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Affiliation(s)
- Sandro Ninni
- CHU de Lille, Université de Lille, 59000 Lille, France.
| | - Vincent Algalarrondo
- Department of Cardiology, Bichat University Hospital, AP-HP, 75018 Paris, France
| | - Fabien Brette
- PhyMedExp, University of Montpellier, INSERM, CNRS, 34093 Montpellier, France
| | | | - Jérémy Fauconnier
- PhyMedExp, University of Montpellier, INSERM, CNRS, 34093 Montpellier, France
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Massarotto RJ, Campbell AJ, Kreiter E, Claydon VE, Cote AT. Effects of detraining on left ventricular mass in endurance-trained individuals: a systematic review and meta-analysis. Eur J Prev Cardiol 2024; 31:415-424. [PMID: 37821393 DOI: 10.1093/eurjpc/zwad327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 10/04/2023] [Accepted: 10/06/2023] [Indexed: 10/13/2023]
Abstract
AIMS Detraining refers to a loss of training adaptations resulting from reductions in training stimulus due to illness, injury, or active recovery breaks in a training cycle and is associated with a reduction in left ventricular mass (LVM). The purpose of this study was to conduct a systematic review and meta-analysis to determine the influence of detraining on LVM in endurance-trained, healthy individuals. METHODS AND RESULTS Using electronic databases (e.g. EMBASE and MEDLINE), a literature search was performed looking for prospective detraining studies in humans. Inclusion criteria were adults, endurance-trained individuals with no known chronic disease, detraining intervention >1 week, and pre- and post-detraining LVM reported. A pooled statistic for random effects was used to assess changes in LVM with detraining. Fifteen investigations (19 analyses) with a total of 196 participants (ages 18-55 years, 15% female) met inclusion criteria, with detraining ranging between 1.4 and 15 weeks. The meta-analysis revealed a significant reduction in LVM with detraining (standardized mean difference = -0.586; 95% confidence interval = -0.817, -0.355; P < 0.001). Independently, length of detraining was not correlated with the change in LVM. However, a meta-regression model revealed length of the detraining, when training status was accounted for, was associated with the reduction of LVM (Q = 15.20, df = 3, P = 0.0017). Highly trained/elite athletes had greater reductions in LVM compared with recreational and newly trained individuals (P < 0.01). Limitations included relatively few female participants and inconsistent reporting of intervention details. CONCLUSION In summary, LVM is reduced following detraining of one week or more. Further research may provide a greater understanding of the effects of sex, age, and type of detraining on changes in LVM in endurance-trained individuals.
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Affiliation(s)
- Raffaele J Massarotto
- Integrative Cardiovascular Physiology Laboratory, School of Human Kinetics, Trinity Western University, 25000 University Drive, Langley, BC V2Y 1Y1, Canada
- Cardiovascular Physiology Laboratory, Department of Biomedical Physiology and Kinesiology, Simon Fraser University, 8888 University Drive, Burnaby, V5A 1S6, Canada
| | - Allison J Campbell
- Integrative Cardiovascular Physiology Laboratory, School of Human Kinetics, Trinity Western University, 25000 University Drive, Langley, BC V2Y 1Y1, Canada
- Cardiovascular Physiology Laboratory, Department of Biomedical Physiology and Kinesiology, Simon Fraser University, 8888 University Drive, Burnaby, V5A 1S6, Canada
| | - Elizabeth Kreiter
- Norma Marion Alloway Library, Trinity Western University, 25000 University Drive, Langley, V2Y 1Y1, Canada
| | - Victoria E Claydon
- Cardiovascular Physiology Laboratory, Department of Biomedical Physiology and Kinesiology, Simon Fraser University, 8888 University Drive, Burnaby, V5A 1S6, Canada
| | - Anita T Cote
- Integrative Cardiovascular Physiology Laboratory, School of Human Kinetics, Trinity Western University, 25000 University Drive, Langley, BC V2Y 1Y1, Canada
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Rowe SJ, Paratz ED, Foulkes SJ, Janssens K, Spencer LW, Fahy L, D'Ambrosio P, Haykowsky MJ, La Gerche A. Understanding Exercise Capacity: From Elite Athlete to HFpEF. Can J Cardiol 2023; 39:S323-S334. [PMID: 37574129 DOI: 10.1016/j.cjca.2023.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/27/2023] [Accepted: 08/08/2023] [Indexed: 08/15/2023] Open
Abstract
Exercise capacity is a spectrum that reflects an individual's functional capacity and the dynamic nature of cardiac remodelling along with respiratory and skeletal muscle systems. The relationship of increasing physical activity, increased cardiac mass and volumes, and improved cardiorespiratory fitness (CRF) is well established in the endurance athlete. However, less emphasis has been placed on the other end of the spectrum, which includes individuals with a more sedentary lifestyle and small hearts who are at increased risk of functional disability and poor clinical outcomes. Reduced CRF is an independent predictor of all-cause mortality and cardiovascular events determined by multiple inter-related exogenous and endogenous factors. In this review, we explore the relationship of physical activity, cardiac remodelling, and CRF across the exercise spectrum, emphasising the critical role of cardiac size in determining exercise capacity. In contrast to the large compliant left ventricle of the endurance athlete, an individual with a lifetime of physical inactivity is likely to have a small, stiff heart with reduced cardiac reserve. We propose that this might contribute to the development of heart failure with preserved ejection fraction in certain individuals, and is key to understanding the link between low CRF and increased risk of heart failure.
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Affiliation(s)
- Stephanie J Rowe
- Baker Heart and Diabetes Institute, Melbourne, Australia; Cardiology Department, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia; Baker Department of Cardiometabolic Health, The University of Melbourne, Parkville, Victoria, Australia.
| | - Elizabeth D Paratz
- Baker Heart and Diabetes Institute, Melbourne, Australia; Cardiology Department, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia; Baker Department of Cardiometabolic Health, The University of Melbourne, Parkville, Victoria, Australia
| | - Stephen J Foulkes
- Baker Heart and Diabetes Institute, Melbourne, Australia; Baker Department of Cardiometabolic Health, The University of Melbourne, Parkville, Victoria, Australia; Faculty of Nursing, College of Health Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Kristel Janssens
- Baker Heart and Diabetes Institute, Melbourne, Australia; Exercise and Nutrition Research Program, The Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
| | - Luke W Spencer
- Baker Heart and Diabetes Institute, Melbourne, Australia; Baker Department of Cardiometabolic Health, The University of Melbourne, Parkville, Victoria, Australia
| | - Louise Fahy
- Baker Heart and Diabetes Institute, Melbourne, Australia; Cardiology Department, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia
| | - Paolo D'Ambrosio
- Baker Heart and Diabetes Institute, Melbourne, Australia; Baker Department of Cardiometabolic Health, The University of Melbourne, Parkville, Victoria, Australia; Cardiology Department, Royal Melbourne Hospital, Parkville, Australia
| | - Mark J Haykowsky
- Baker Heart and Diabetes Institute, Melbourne, Australia; Faculty of Nursing, College of Health Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Andre La Gerche
- Baker Heart and Diabetes Institute, Melbourne, Australia; Cardiology Department, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia; Baker Department of Cardiometabolic Health, The University of Melbourne, Parkville, Victoria, Australia
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La Gerche A, Foulkes SJ, Haykowsky MJ. Reply: Heart Failure With Preserved Ejection Fraction: Exercise Deficiency or Ventricular Maladaptation to Metabolic Demands? JACC Cardiovasc Imaging 2023; 16:1236-1237. [PMID: 37673478 DOI: 10.1016/j.jcmg.2023.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 06/08/2023] [Indexed: 09/08/2023]
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6
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Sun X, Li L, Sun M, Hou S, Li Z, Li P, Liu M, Hua S. Evaluation of Left Ventricular Systolic Function Using Layer-Specific Strain in Rats Performing Endurance Exercise: A Pilot Study. ULTRASOUND IN MEDICINE & BIOLOGY 2023; 49:1395-1400. [PMID: 36878830 DOI: 10.1016/j.ultrasmedbio.2023.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/30/2022] [Accepted: 01/20/2023] [Indexed: 05/11/2023]
Abstract
OBJECTIVE The functional characteristics of exercise-induced myocardial hypertrophy were studied in a rat model in conjunction with ultrasound layered strain technique to investigate the hidden changes in the heart brought about by exercise. METHODS Forty specific pathogen free (SPF) adult Sprague-Dawley rats were selected and randomly divided into two groups of 20 exercise and 20 control rats. The longitudinal and circumferential strain parameters were measured using the ultrasonic stratified strain technique. The differences between the two groups and the predictive effect of stratified strain parameters on left ventricular systolic function were analyzed. RESULTS The exercise group had significantly higher global endocardial myocardial longitudinal strain (GLSendo), global mid-myocardial global longitudinal strain (GLSmid) and global endocardial myocardial global longitudinal strain (GCSendo) values than the control group (p < 0.05). Even though global mid-myocardial circumferential strain (GCSmid) and global epicardial myocardial circumferential strain (GCSepi) were higher in the exercise group than in the control group, statistical significance was not reached (p > 0.05). Conventional echocardiography parameters were well correlated with GLSendo, GLSmid, and GCSendo (p < 0.05). GLSendo was the best predictor of left ventricular myocardial contractile performance in athletes determined using the receiver operating characteristic curve, with an area under the curve of 0.97, sensitivity of 95% and specificity of 90%. CONCLUSION Rats performing endurance exercise exhibited subclinical changes in the heart after prolonged high-intensity exercise. A stratified strain parameter, GLSendo, played an important role in the evaluation of LV systolic performance in exercising rats.
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Affiliation(s)
- Xinxin Sun
- Department of Ultrasound, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Lijin Li
- Department of Ultrasound, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Mengjiao Sun
- Department of Ultrasound, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - SuYun Hou
- Department of Ultrasound, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Zhen Li
- Department of Ultrasound, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Pengge Li
- Department of Ultrasound, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Mengmeng Liu
- Department of Ultrasound, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Shaohua Hua
- Department of Ultrasound, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
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7
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Relating QRS voltages to left ventricular mass and body composition in elite endurance athletes. Eur J Appl Physiol 2023; 123:547-559. [PMID: 36376599 DOI: 10.1007/s00421-022-05080-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 10/20/2022] [Indexed: 11/16/2022]
Abstract
PURPOSE Electrocardiogram (ECG) QRS voltages correlate poorly with left ventricular mass (LVM). Body composition explains some of the QRS voltage variability. The relation between QRS voltages, LVM and body composition in endurance athletes is unknown. METHODS Elite endurance athletes from the Pro@Heart trial were evaluated with 12-lead ECG for Cornell and Sokolow-Lyon voltage and product. Cardiac magnetic resonance imaging assessed LVM. Dual energy x-ray absorptiometry assessed fat mass (FM) and lean mass of the trunk and whole body (LBM). The determinants of QRS voltages and LVM were identified by multivariable linear regression. Models combining ECG, demographics, DEXA and exercise capacity to predict LVM were developed. RESULTS In 122 athletes (19 years, 71.3% male) LVM was a determinant of the Sokolow-Lyon voltage and product (β = 0.334 and 0.477, p < 0.001) but not of the Cornell criteria. FM of the trunk (β = - 0.186 and - 0.180, p < 0.05) negatively influenced the Cornell voltage and product but not the Sokolow-Lyon criteria. DEXA marginally improved the prediction of LVM by ECG (r = 0.773 vs 0.510, p < 0.001; RMSE = 18.9 ± 13.8 vs 25.5 ± 18.7 g, p > 0.05) with LBM as the strongest predictor (β = 0.664, p < 0.001). DEXA did not improve the prediction of LVM by ECG and demographics combined and LVM was best predicted by including VO2max (r = 0.845, RMSE = 15.9 ± 11.6 g). CONCLUSION LVM correlates poorly with QRS voltages with adipose tissue as a minor determinant in elite endurance athletes. LBM is the strongest single predictor of LVM but only marginally improves LVM prediction beyond ECG variables. In endurance athletes, LVM is best predicted by combining ECG, demographics and VO2max.
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8
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Forså MI, Bjerring AW, Haugaa KH, Smedsrud MK, Sarvari SI, Landgraff HW, Hallén J, Edvardsen T. Young athlete's growing heart: sex differences in cardiac adaptation to exercise training during adolescence. Open Heart 2023; 10:openhrt-2022-002155. [PMID: 36596623 DOI: 10.1136/openhrt-2022-002155] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 12/13/2022] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Athlete's heart is a condition of exercise-induced cardiac remodelling. Adult male endurance athletes more often remodel beyond reference values. The impact of sex on remodelling through adolescence remains unclear. Paediatric reference values do not account for patient sex or exercise history. We aimed to study the effect of sex on cardiac remodelling throughout adolescence. METHODS We recruited 76 male (M) and female (F) 12-year-old cross-country skiers in a longitudinal cohort study. Echocardiography was performed and analysed according to guidelines at age 12 (48 M, 28 F), 15 (34 M, 14 F) and 18 (23 M, 11 F). Repeated echocardiographic measurements were analysed by linear mixed model regression. RESULTS Males displayed greater indexed left ventricular end-diastolic volumes (LV EDVi) from age 12 (M 81±7 vs F 76±7, mL/m², p≤0.01), and progressed further until follow-up at age 18 (M 2.3±9.7 vs F -3.9±4.5 ΔmL/m², p≤0.01). LV EDVi remained above adult upper reference values in both groups. Males increased LV Mass Index from age 12 to 18 (M 33±27 vs F 4±19, Δg/m², p≤0.01). Males displayed LV mass above paediatric reference values at ages 15 and 18. A subset of males (35%) and females (25%) displayed wall thickness above paediatric reference values at age 12. Cardiac function was normal. There was no sex difference in exercise hours. CONCLUSION Sex-related differences in athlete's heart were evident from age 12, and progressed throughout adolescence. Remodelling beyond reference values was more frequent than previously reported, particularly affecting males. Age, sex and exercise history may assist clinicians in distinguishing exercise-induced remodelling from pathology in adolescents.
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Affiliation(s)
- Marianne Inngjerdingen Forså
- ProCardio Center for Innovation, Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Anders W Bjerring
- ProCardio Center for Innovation, Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Kristina H Haugaa
- ProCardio Center for Innovation, Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Marit Kristine Smedsrud
- ProCardio Center for Innovation, Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway.,Department of Paediatric Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Sebastian I Sarvari
- ProCardio Center for Innovation, Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Hege W Landgraff
- Department of Physical Performance, Norwegian School of Sports Sciences, Oslo, Norway
| | - Jostein Hallén
- Department of Physical Performance, Norwegian School of Sports Sciences, Oslo, Norway
| | - Thor Edvardsen
- ProCardio Center for Innovation, Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway .,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
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9
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Smith NDW, Scott BR, Girard O, Peiffer JJ. Aerobic Training With Blood Flow Restriction for Endurance Athletes: Potential Benefits and Considerations of Implementation. J Strength Cond Res 2022; 36:3541-3550. [PMID: 34175880 DOI: 10.1519/jsc.0000000000004079] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
ABSTRACT Smith, NDW, Scott, BR, Girard, O, and Peiffer, JJ. Aerobic training with blood flow restriction for endurance athletes: potential benefits and considerations of implementation. J Strength Cond Res 36(12): 3541-3550, 2022-Low-intensity aerobic training with blood flow restriction (BFR) can improve maximal oxygen uptake, delay the onset of blood lactate accumulation, and may provide marginal benefits to economy of motion in untrained individuals. Such a training modality could also improve these physiological attributes in well-trained athletes. Indeed, aerobic BFR training could be beneficial for those recovering from injury, those who have limited time for training a specific physiological capacity, or as an adjunct training stimulus to provide variation in a program. However, similarly to endurance training without BFR, using aerobic BFR training to elicit physiological adaptations in endurance athletes will require additional considerations compared with nonendurance athletes. The objective of this narrative review is to discuss the acute and chronic aspects of aerobic BFR exercise for well-trained endurance athletes and highlight considerations for its effective implementation. This review first highlights key physiological capacities of endurance performance. The acute and chronic responses to aerobic BFR exercise and their impact on performance are then discussed. Finally, considerations for prescribing and monitoring aerobic BFR exercise in trained endurance populations are addressed to challenge current views on how BFR exercise is implemented.
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Affiliation(s)
- Nathan D W Smith
- Exercise Science, Murdoch University, Perth, Western Australia.,Murdoch Applied Sports Science Laboratory, Murdoch University, Perth, Western Australia
| | - Brendan R Scott
- Murdoch Applied Sports Science Laboratory, Murdoch University, Perth, Western Australia.,Center for Healthy Ageing, Murdoch University, Perth, Western Australia ; and
| | - Olivier Girard
- School of Human Sciences (Exercise and Sport Science), The University of Western Australia, Perth, Western Australia
| | - Jeremiah J Peiffer
- Murdoch Applied Sports Science Laboratory, Murdoch University, Perth, Western Australia.,Center for Healthy Ageing, Murdoch University, Perth, Western Australia ; and
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10
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Stanton KM, Wylie L, Kotchetkova I, Coy A, Carroll G, LA Gerche A, Celermajer DS. Soldiers' Heart: A Prospective Study of Cardiac Remodeling in Soldiers Undergoing Progressive Intensity Exercise Training. Med Sci Sports Exerc 2022; 54:2011-2019. [PMID: 35881923 DOI: 10.1249/mss.0000000000003006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE Most studies reporting cardiac changes with exercise have been cross sectional. The few available longitudinal studies have lacked standardization for environmental confounders. We prospectively assessed the relationship between increasing exercise intensity and cardiac remodeling in a highly standardized cohort of healthy young army soldiers. METHODS Sixty-three male army recruits (22 ± 3 yr) underwent a 12-wk moderate-intensity mixed strength and endurance exercise program, followed by a further 15-wk high-intensity exercise program, with highly controlled exercise, diet, and sleep patterns. Fitness (multistage fitness test), anthropometry, and 2D echocardiography were assessed. RESULTS Moderate-intensity exercise was associated with increased fitness and decreased body fat % (both P < 0.01). There was no significant incremental change in these parameters after high-intensity exercise. By contrast, both moderate- and high-intensity exercises were associated with dose-dependent increases in left atrial and left ventricular (LV) volumes, LV mass, and right ventricular (RV) size (all P < 0.01). At the end of high-intensity training, 51% had a dilated LV and 59% had a dilated RV compared with published normal ranges. Almost all had normal LV systolic function and strain before and after exercise training. A small number of soldiers had mildly decreased RV systolic function at baseline and after moderate-intensity exercise (3% and 6%, respectively). CONCLUSIONS We describe "soldiers' heart," which is characterized by balanced chamber dilatation, normal LV mass, and largely normal systolic function and myocardial strain. This prospective and highly controlled longitudinal study also found that increasing intensity exercise was associated with increasing chamber dimensions, which paralleled an increase in fitness after moderate-intensity exercise. After high-intensity exercise, however, cardiac chamber size continued to increase, but fitness did not increase further.
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Affiliation(s)
| | - Laura Wylie
- Heart Research Institute Sydney, Newtown, New South Wales, AUSTRALIA
| | | | - Amy Coy
- Heart Research Institute Sydney, Newtown, New South Wales, AUSTRALIA
| | - Gerard Carroll
- Wagga Wagga Base Hospital, Wagga Wagga, New South Wales, AUSTRALIA
| | - André LA Gerche
- Baker Heart and Diabetes Research Institute, Melbourne, Victoria, AUSTRALIA
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11
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La Gerche A, Wasfy MM, Brosnan MJ, Claessen G, Fatkin D, Heidbuchel H, Baggish AL, Kovacic JC. The Athlete's Heart-Challenges and Controversies: JACC Focus Seminar 4/4. J Am Coll Cardiol 2022; 80:1346-1362. [PMID: 36075838 DOI: 10.1016/j.jacc.2022.07.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 07/18/2022] [Accepted: 07/21/2022] [Indexed: 12/11/2022]
Abstract
Regular exercise promotes structural, functional, and electrical remodeling of the heart, often referred to as the "athlete's heart," with intense endurance sports being associated with the greatest degree of cardiac remodeling. However, the extremes of exercise-induced cardiac remodeling are potentially associated with uncommon side effects. Atrial fibrillation is more common among endurance athletes and there is speculation that other arrhythmias may also be more prevalent. It is yet to be determined whether this arrhythmic susceptibility is a result of extreme exercise remodeling, genetic predisposition, or other factors. Gender may have the greatest influence on the cardiac response to exercise, but there has been far too little research directed at understanding differences in the sportsman's vs sportswoman's heart. Here in part 4 of a 4-part seminar series, the controversies and ambiguities regarding the athlete's heart, and in particular, its arrhythmic predisposition, genetic, and gender influences are reviewed in depth.
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Affiliation(s)
- Andre La Gerche
- Clinical Research Domain, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia; National Centre for Sports Cardiology, Fitzroy, Victoria, Australia; Cardiology Department, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia.
| | - Meagan M Wasfy
- Division of Cardiology, Massachusetts General Hospital, Boston, Massachusetts, USA; Cardiovascular Performance Program, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Maria J Brosnan
- National Centre for Sports Cardiology, Fitzroy, Victoria, Australia; Cardiology Department, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia
| | - Guido Claessen
- Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium; Department of Cardiovascular Diseases, University Hospitals Leuven, Leuven, Belgium
| | - Diane Fatkin
- Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales, Australia; School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, New South Wales, Australia; Cardiology Department, St Vincent's Hospital, Darlinghurst, New South Wales, Australia
| | - Hein Heidbuchel
- Antwerp University Hospital, Department of Cardiology, Antwerp, Belgium; Cardiovascular Sciences, Antwerp University, Antwerp, Belgium
| | - Aaron L Baggish
- Division of Cardiology, Massachusetts General Hospital, Boston, Massachusetts, USA; Cardiovascular Performance Program, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Jason C Kovacic
- Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales, Australia; School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, New South Wales, Australia; Cardiology Department, St Vincent's Hospital, Darlinghurst, New South Wales, Australia; Cardiovascular Research Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
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12
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La Gerche A, Howden EJ, Haykowsky MJ, Lewis GD, Levine BD, Kovacic JC. Heart Failure With Preserved Ejection Fraction as an Exercise Deficiency Syndrome: JACC Focus Seminar 2/4. J Am Coll Cardiol 2022; 80:1177-1191. [PMID: 36075837 DOI: 10.1016/j.jacc.2022.07.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 07/11/2022] [Accepted: 07/12/2022] [Indexed: 10/14/2022]
Abstract
Across differing spectrums of cardiac function and cardiac pathologies, there are strong associations between measures of cardiorespiratory fitness and burden of symptoms, quality of life, and prognosis. In this part 2 of a 4-part series, we contend that there is a strong association among physical activity, cardiorespiratory fitness, and cardiac function. We argue that a chronic lack of exercise is a major risk factor for heart failure with preserved ejection fraction in some patients. In support of this hypothesis, increasing physical activity is associated with greater cardiac mass, greater stroke volumes, greater cardiac output and peak oxygen consumption, and fewer clinical events. Conversely, physical inactivity results in cardiac atrophy, reduced output, reduced chamber size, and decreased ability to augment cardiac performance with exercise. Moreover, physical inactivity is a strong predictor of heart failure risk and death. In sum, exercise deficiency should be considered part of the broad heart failure with preserved ejection fraction phenotype.
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Affiliation(s)
- Andre La Gerche
- Clinical Research Domain, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia; National Centre for Sports Cardiology, Fitzroy, Victoria, Australia; Cardiology Department, St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia.
| | - Erin J Howden
- Clinical Research Domain, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Mark J Haykowsky
- Clinical Research Domain, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia; Faculty of Nursing, College of Health Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Gregory D Lewis
- Cardiology Division, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Benjamin D Levine
- Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, Dallas, Texas, USA; University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Jason C Kovacic
- Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales, Australia; St Vincent's Clinical School, University of New South Wales, Sydney, New South Wales, Australia; Cardiovascular Research Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
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13
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Frundi DS, Kettig E, Popp LL, Hoffman M, Dumartin M, Hughes M, Lamy E, Fru YJW, Bano A, Muka T, Wilhelm M. Physical performance and glycemic control under SGLT-2-inhibitors in patients with type 2 diabetes and established atherosclerotic cardiovascular diseases or high cardiovascular risk (PUSH): Design of a 4-week prospective observational study. Front Cardiovasc Med 2022; 9:907385. [PMID: 35935634 PMCID: PMC9354468 DOI: 10.3389/fcvm.2022.907385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 06/24/2022] [Indexed: 11/30/2022] Open
Abstract
Background Type 2 diabetes (T2D) is associated with limitation in physical performance. Results from animal studies report enhancement of physical performance in T2D rodents treated with sodium glucose cotransporter 2 inhibitors (SGLT2is). However, in human patients with T2D and established atherosclerotic cardiovascular disease (ASCVD) or high cardiovascular risk, the impact of guideline directed SGLT2i medication on physical performance has not been sufficiently examined. Objectives The main objectives of this study are thus firstly, to assess the changes in physical performance after 4 weeks of exercise therapy in patients with established ASCVD or high cardiovascular risk categorized into three groups according to their glycemic control at baseline. Secondly, to investigate the association of glycemic control at baseline and new guideline directed antidiabetic treatment (inadequate glycemic control and diabetes + new SGLT2i vs. adequate glycemic control and diabetes vs. no diabetes) with change in physical performance. Methods and design This is a 4-week prospective observational study of 450 participants with established ASCVD or high cardiovascular risk with or without T2D and without previous SGLT2i medication undergoing exercise therapy during inpatient rehabilitation in a single center in Switzerland. Upon admission, participants are categorized into 3 groups of 150 participants each according to their glycemic control. Group I consisting of participants with inadequately controlled T2D defined as mean fasting plasma glucose (FPG) of ≥7 mmol/L, who are consequently administered new treatment with an SGLT2i. Group II comprises of participants with adequately controlled T2D with mean FPG of <7 mmol/L requiring no antidiabetic medication change. Group III consists of participants with no diabetes and mean FPG of ≤ 5.5 mmol/L. Primary outcomes are 6-min walk distance and rate of perceived exertion. Secondary outcomes are echocardiographic parameters (left ventricular mass index; global longitudinal strain average; end-diastolic volume), fatigue, muscle, metabolic, and anthropometric measures. Ethics and dissemination This study is conducted in accordance with the Declaration of Helsinki with ethical approval from the Cantonal Ethical Commission of Bern, Switzerland. The results will be published in a peer-reviewed journal. The implementation and reporting will be according to the SPIRIT guidelines. Study protocol registration https://www.clinicaltrials.gov/, identifier: NCT03422263.
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Affiliation(s)
- Devine S. Frundi
- Berner Klinik Montana, Zentrum für Medizinische und Neurologische Rehabilitation, Crans-Montana, Switzerland
- Permanence Médicale, Hôpital de Sierre, Sierre, Switzerland
- *Correspondence: Devine S. Frundi
| | - Eva Kettig
- Berner Klinik Montana, Zentrum für Medizinische und Neurologische Rehabilitation, Crans-Montana, Switzerland
| | - Lena Luise Popp
- Berner Klinik Montana, Zentrum für Medizinische und Neurologische Rehabilitation, Crans-Montana, Switzerland
| | - Melanie Hoffman
- Berner Klinik Montana, Zentrum für Medizinische und Neurologische Rehabilitation, Crans-Montana, Switzerland
| | - Marine Dumartin
- Berner Klinik Montana, Zentrum für Medizinische und Neurologische Rehabilitation, Crans-Montana, Switzerland
| | - Magali Hughes
- Berner Klinik Montana, Zentrum für Medizinische und Neurologische Rehabilitation, Crans-Montana, Switzerland
| | - Edgar Lamy
- Berner Klinik Montana, Zentrum für Medizinische und Neurologische Rehabilitation, Crans-Montana, Switzerland
| | | | - Arjola Bano
- Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland
- Center for Preventive Cardiology, University Hospital Bern and University of Bern, Bern, Switzerland
| | - Taulant Muka
- Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland
| | - Matthias Wilhelm
- Center for Preventive Cardiology, University Hospital Bern and University of Bern, Bern, Switzerland
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14
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De Bosscher R, Dausin C, Janssens K, Bogaert J, Elliott A, Ghekiere O, Van De Heyning CM, Sanders P, Kalman J, Fatkin D, Herbots L, Willems R, Heidbuchel H, La Gerche A, Claessen G. Rationale and design of the PROspective ATHletic Heart (Pro@Heart) study: long-term assessment of the determinants of cardiac remodelling and its clinical consequences in endurance athletes. BMJ Open Sport Exerc Med 2022; 8:e001309. [PMID: 35368514 PMCID: PMC8935177 DOI: 10.1136/bmjsem-2022-001309] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/04/2022] [Indexed: 12/25/2022] Open
Abstract
Background Exercise-induced cardiac remodelling (EICR) results from the structural, functional and electrical adaptations to exercise. Despite similar sports participation, EICR varies and some athletes develop phenotypic features that overlap with cardiomyopathies. Training load and genotype may explain some of the variation; however, exercise ‘dose’ has lacked rigorous quantification. Few have investigated the association between EICR and genotype. Objectives (1) To identify the impact of training load and genotype on the variance of EICR in elite endurance athletes and (2) determine how EICR and its determinants are associated with physical performance, health benefits and cardiac pathology. Methods The Pro@Heart study is a multicentre prospective cohort trial. Three hundred elite endurance athletes aged 14–23 years will have comprehensive cardiovascular phenotyping using echocardiography, cardiac MRI, 12-lead ECG, exercise-ECG and 24-hour-Holter monitoring. Genotype will be determined using a custom cardiomyopathy gene panel and high-density single-nucleotide polymorphism arrays. Follow-up will include online tracking of training load. Cardiac phenotyping will be repeated at 2, 5, 10 and 20 years. Results The primary endpoint of the Pro@Heart study is the association of EICR with both training load and genotype. The latter will include rare variants in cardiomyopathy-associated genes and polygenic risk scores for cardiovascular traits. Secondary endpoints are the incidence of atrial and ventricular arrhythmias, physical performance and health benefits and their association with training load and genotype. Conclusion The Pro@Heart study is the first long-term cohort study to assess the impact of training load and genotype on EICR. Trial registration number NCT05164328; ACTRN12618000716268.
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Affiliation(s)
- Ruben De Bosscher
- Cardiovascular Sciences, KU Leuven, Leuven, Belgium.,Cardiology, KU Leuven University Hospitals Leuven, Leuven, Belgium
| | | | - Kristel Janssens
- Cardiology, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Jan Bogaert
- Radiology, KU Leuven University Hospitals Leuven, Leuven, Belgium
| | - Adrian Elliott
- Cardiology, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,Centre for Heart Rhythm Disorders, The University of Adelaide, Adelaide, South Australia, Australia
| | - Olivier Ghekiere
- Cardiology, Jessa Hospital Campus Virga Jesse, Hasselt, Belgium.,Cardivacsular Sciences, University Hasselt Biomedical Research Institute Rehabilitation Research Center, Diepenbeek, Belgium
| | - Caroline M Van De Heyning
- Cardiology, University of Antwerp, Antwerpen, Belgium.,Cardiovascular Sciences, University Hospital Antwerp, Edegem, Belgium
| | - Prashanthan Sanders
- Cardiology, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,Centre for Heart Rhythm Disorders, The University of Adelaide, Adelaide, South Australia, Australia
| | - Jonathan Kalman
- Cardiology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Diane Fatkin
- Inherited Heart Diseases, Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales, Australia
| | - Lieven Herbots
- Cardiology, Jessa Hospital Campus Virga Jesse, Hasselt, Belgium.,Cardivacsular Sciences, University Hasselt Biomedical Research Institute Rehabilitation Research Center, Diepenbeek, Belgium
| | - Rik Willems
- Cardiovascular Sciences, KU Leuven, Leuven, Belgium.,Cardiology, KU Leuven University Hospitals Leuven, Leuven, Belgium
| | - Hein Heidbuchel
- Cardiology, University Hospital Antwerp, Edegem, Belgium.,Cardiovascular Sciences, University of Antwerp, Antwerpen, Belgium
| | - André La Gerche
- Department of Cardiology, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Guido Claessen
- Cardiovascular Sciences, KU Leuven, Leuven, Belgium.,Cardiology, KU Leuven University Hospitals Leuven, Leuven, Belgium
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15
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OUP accepted manuscript. Eur J Prev Cardiol 2022; 29:1594-1604. [DOI: 10.1093/eurjpc/zwac026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/14/2022] [Accepted: 02/03/2022] [Indexed: 11/14/2022]
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16
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Perkins DR, Talbot JS, Lord RN, Dawkins TG, Baggish AL, Zaidi A, Uzun O, Mackintosh KA, McNarry MA, Cooper SM, Lloyd RS, Oliver JL, Shave RE, Stembridge M. The influence of maturation on exercise-induced cardiac remodelling and haematological adaptation. J Physiol 2021; 600:583-601. [PMID: 34935156 DOI: 10.1113/jp282282] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 12/15/2021] [Indexed: 11/08/2022] Open
Abstract
KEY POINTS It has long been hypothesised that cardiovascular adaptation to endurance training is augmented following puberty. We investigated whether differences in cardiac and haematological variables exist, and to what extent, between endurance-trained vs. untrained, pre- and post-peak height velocity (PHV) children, and how these central factors relate to maximal oxygen consumption. Using echocardiography to quantify left ventricular (LV) morphology and carbon monoxide rebreathing to determine blood volume and haemoglobin mass, we identified that training-related differences in LV morphology are evident in pre-PHV children, with haematological differences also observed between pre-PHV girls. However, the breadth and magnitude of cardiovascular remodelling was more pronounced post-PHV. Cardiac and haematological measures provide significant predictive models for maximal oxygen consumption in children that are much stronger post-PHV, suggesting that other important determinants within the oxygen transport chain could account for the majority of variance in before puberty. ABSTRACT Cardiovascular and haematological adaptations to endurance training facilitate greater maximal oxygen consumption, and such adaptations maybe augmented following puberty. Therefore, we compared left ventricular (LV) morphology (echocardiography), blood volume, haemoglobin (Hb) mass (CO-rebreathe) and in endurance-trained and untrained boys (n = 42, age = 9.0-17.1 years, = 61.6±7.2 mL∙kg∙min, and n = 31, age = 8.0-17.7 years, O2max = 46.5±6.1 mL∙kg∙min, respectively) and girls (n = 45, age = 8.2-17.0 years, O2max = 51.4±5.7 mL∙kg∙min and n = 36, age = 8.0-17.6 years, O2max = 39.8±5.7 mL∙kg∙min, respectively). Pubertal stage was estimated via maturity offset, with participants classified as pre- or post-peak height velocity (PHV). Pre-PHV, only a larger LV end-diastolic volume/lean body mass (EDV/LBM) for trained boys (+0.28 mL∙kgLBM , P = 0.007) and a higher Hb mass/LBM for trained girls (+1.65 g∙kgLBM , P = 0.007) were evident compared to untrained controls. Post-PHV, LV mass/LBM (boys:+0.50 g∙kgLBM , P = 0.0003; girls:+0.35 g∙kgLBM , P = 0.003), EDV/LBM (boys:+0.35 mL∙kgLBM , P<0.0001; girls:+0.31 mL∙kgLBM, P = 0.0004), blood volume/LBM (boys:+12.47 mL∙kgLBM , P = 0.004; girls:+13.48 mL∙kgLBM , P = 0.0002.) and Hb mass/LBM (boys:+1.29 g∙kgLBM , P = 0.015; girls:+1.47 g∙kgLBM , P = 0.002) were all greater in trained vs. untrained groups. Pre-PHV, EDV (R2 adj = 0.224, P = 0.001) in boys, and Hb mass and interventricular septal thickness (R2 adj = 0.317, P = 0.002) in girls partially accounted for the variance in O2max . Post-PHV, stronger predictive models were evident via the inclusion of LV wall thickness and EDV in boys (R2 adj = 0.608, P<0.0001), and posterior wall thickness and Hb mass in girls (R2 adj = 0.490, P<0.0001). In conclusion, cardiovascular adaptation to exercise training is more pronounced post-PHV, with evidence for a greater role of central components for oxygen delivery. Abstract figure legend: Schematic diagram depicting cardiac structural and haematological differences between trained and untrained boys and girls, pre-peak height velocity (PHV) and post-PHV alongside cardiac and haematological variables contributions to the variance in O2max . Cardiac and haematological variables are greater in trained vs. untrained pre-pubertal children, and a greater number and magnitude of differences are observed at post-PHV. These variables provide significant predictive models for maximal oxygen consumption in children and are much stronger post-PHV, suggesting that other important determinants within the oxygen transport chain could account for the majority of variance in O2max before puberty. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Dean R Perkins
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Jack S Talbot
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Rachel N Lord
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Tony G Dawkins
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom.,Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, University of British Columbia Okanagan, Kelowna, Canada
| | - Aaron L Baggish
- Cardiovascular Performance Program, Massachusetts General Hospital, Boston
| | - Abbas Zaidi
- University Hospital of Wales, Cardiff, United Kingdom
| | - Orhan Uzun
- University Hospital of Wales, Cardiff, United Kingdom
| | - Kelly A Mackintosh
- Applied Sports, Technology, Exercise and Medicine (A-STEM) Research Centre, Swansea University, Swansea, United Kingdom
| | - Melitta A McNarry
- Applied Sports, Technology, Exercise and Medicine (A-STEM) Research Centre, Swansea University, Swansea, United Kingdom
| | - Stephen-Mark Cooper
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Rhodri S Lloyd
- Youth Physical Development Centre, Cardiff Metropolitan University, Cardiff, United Kingdom.,Sports Performance Research Institute New Zealand, AUT University, Auckland, New Zealand.,Centre for Sport Science and Human Performance, Waikato Institute of Technology, Waikato, New Zealand
| | - Jon L Oliver
- Youth Physical Development Centre, Cardiff Metropolitan University, Cardiff, United Kingdom.,Sports Performance Research Institute New Zealand, AUT University, Auckland, New Zealand
| | - Rob E Shave
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, University of British Columbia Okanagan, Kelowna, Canada
| | - Mike Stembridge
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
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17
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Charton M, Kervio G, Matelot D, Lachard T, Galli E, Donal E, Carré F, Le Douairon Lahaye S, Schnell F. Exercise-Induced Cardiac Fatigue in Soldiers Assessed by Echocardiography. Front Cardiovasc Med 2021; 8:785869. [PMID: 34988130 PMCID: PMC8720761 DOI: 10.3389/fcvm.2021.785869] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/01/2021] [Indexed: 01/02/2023] Open
Abstract
Background: Echocardiographic signs of exercise-induced cardiac fatigue (EICF) have been described after strenuous endurance exercise. Nevertheless, few data are available on the effects of repeated strenuous exercise, especially when associated with other constraints as sleep deprivation or mental stress which occur during military selection boot camps. Furthermore, we aimed to study the influence of experience and training level on potential EICF signs.Methods: Two groups of trained soldiers were included, elite soldiers from the French Navy Special Forces (elite; n = 20) and non-elite officer cadets from a French military academy (non-elite; n = 38). All underwent echocardiography before and immediately after exposure to several days of uninterrupted intense exercise during their selection boot camps. Changes in myocardial morphology and function of the 4 cardiac chambers were assessed.Results: Exercise-induced decrease in right and left atrial and ventricular functions were demonstrated with 2D-strain parameters in both groups. Indeed, both atrial reservoir strain, RV and LV longitudinal strain and LV global constructive work were altered. Increase in LV mechanical dispersion assessed by 2D-strain and alteration of conventional parameters of diastolic function (increase in E/e' and decrease in e') were solely observed in the non-elite group. Conventional parameters of LV and RV systolic function (LVEF, RVFAC, TAPSE, s mitral, and tricuspid waves) were not modified.Conclusions: Alterations of myocardial functions are observed in soldiers after uninterrupted prolonged intense exercise performed during selection boot camps. These alterations occur both in elite and non-elite soldiers. 2D-strain is more sensitive to detect EICF than conventional echocardiographic parameters.
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Affiliation(s)
- Marion Charton
- Department of Cardiology, Pontchaillou Hospital, Rennes, France
| | | | - David Matelot
- LTSI, INSERM, U1099, University of Rennes 1, Rennes, France
| | - Thibault Lachard
- Department of Sport Medicine, Pontchaillou Hospital, Rennes, France
| | - Elena Galli
- Department of Cardiology, Pontchaillou Hospital, Rennes, France
- LTSI, INSERM, U1099, University of Rennes 1, Rennes, France
| | - Erwan Donal
- Department of Cardiology, Pontchaillou Hospital, Rennes, France
- LTSI, INSERM, U1099, University of Rennes 1, Rennes, France
| | - François Carré
- LTSI, INSERM, U1099, University of Rennes 1, Rennes, France
- Department of Sport Medicine, Pontchaillou Hospital, Rennes, France
| | | | - Frédéric Schnell
- LTSI, INSERM, U1099, University of Rennes 1, Rennes, France
- Department of Sport Medicine, Pontchaillou Hospital, Rennes, France
- *Correspondence: Frédéric Schnell
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18
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Cardiopulmonary Exercise Test Parameters in Athletic Population: A Review. J Clin Med 2021; 10:jcm10215073. [PMID: 34768593 PMCID: PMC8584629 DOI: 10.3390/jcm10215073] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/17/2021] [Accepted: 10/26/2021] [Indexed: 11/23/2022] Open
Abstract
Although still underutilized, cardiopulmonary exercise testing (CPET) allows the most accurate and reproducible measurement of cardiorespiratory fitness and performance in athletes. It provides functional physiologic indices which are key variables in the assessment of athletes in different disciplines. CPET is valuable in clinical and physiological investigation of individuals with loss of performance or minor symptoms that might indicate subclinical cardiovascular, pulmonary or musculoskeletal disorders. Highly trained athletes have improved CPET values, so having just normal values may hide a medical disorder. In the present review, applications of CPET in athletes with special attention on physiological parameters such as VO2max, ventilatory thresholds, oxygen pulse, and ventilatory equivalent for oxygen and exercise economy in the assessment of athletic performance are discussed. The role of CPET in the evaluation of possible latent diseases and overtraining syndrome, as well as CPET-based exercise prescription, are outlined.
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19
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Potential Long-Term Health Problems Associated with Ultra-Endurance Running: A Narrative Review. Sports Med 2021; 52:725-740. [PMID: 34542868 PMCID: PMC8450723 DOI: 10.1007/s40279-021-01561-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2021] [Indexed: 12/14/2022]
Abstract
It is well established that physical activity reduces all-cause mortality and can prolong life. Ultra-endurance running (UER) is an extreme sport that is becoming increasingly popular, and comprises running races above marathon distance, exceeding 6 h, and/or running fixed distances on multiple days. Serious acute adverse events are rare, but there is mounting evidence that UER may lead to long-term health problems. The purpose of this review is to present the current state of knowledge regarding the potential long-term health problems derived from UER, specifically potential maladaptation in key organ systems, including cardiovascular, respiratory, musculoskeletal, renal, immunological, gastrointestinal, neurological, and integumentary systems. Special consideration is given to youth, masters, and female athletes, all of whom may be more susceptible to certain long-term health issues. We present directions for future research into the pathophysiological mechanisms that underpin athlete susceptibility to long-term issues. Although all body systems can be affected by UER, one of the clearest effects of endurance exercise is on the cardiovascular system, including right ventricular dysfunction and potential increased risk of arrhythmias and hypertension. There is also evidence that rare cases of acute renal injury in UER could lead to progressive renal scarring and chronic kidney disease. There are limited data specific to female athletes, who may be at greater risk of certain UER-related health issues due to interactions between energy availability and sex-hormone concentrations. Indeed, failure to consider sex differences in the design of female-specific UER training programs may have a negative impact on athlete longevity. It is hoped that this review will inform risk stratification and stimulate further research about UER and the implications for long-term health.
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20
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Chen YC, Voskoboinik A, Gerche AL, Marwick TH, McMullen JR. Prevention of Pathological Atrial Remodeling and Atrial Fibrillation: JACC State-of-the-Art Review. J Am Coll Cardiol 2021; 77:2846-2864. [PMID: 34082914 DOI: 10.1016/j.jacc.2021.04.012] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 04/07/2021] [Indexed: 12/29/2022]
Abstract
Atrial enlargement in response to pathological stimuli (e.g., hypertension, mitral valve disease) and physiological stimuli (exercise, pregnancy) can be comparable in magnitude, but the diseased enlarged atria is associated with complications such as atrial fibrillation (AF), whereas physiological atrial enlargement is not. Pathological atrial enlargement and AF is also observed in a small percentage of athletes undergoing extreme/intense endurance sport and pregnant women with preeclampsia. Differences between physiological and pathological atrial enlargement and underlying mechanisms are poorly understood. This review describes human and animal studies characterizing atrial enlargement under physiological and pathological conditions and highlights key knowledge gaps and clinical challenges, including: 1) the limited ability of atria to reverse remodel; and 2) distinguishing physiological and pathological enlargement via imaging/biomarkers. Finally, this review discusses how targeting distinct molecular mechanisms underlying physiological and pathological atrial enlargement could provide new therapeutic and diagnostic strategies for preventing or reversing atrial enlargement and AF.
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Affiliation(s)
- Yi Ching Chen
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Aleksandr Voskoboinik
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia; Heart Center, Alfred Hospital, Melbourne, Victoria, Australia; Department of Cardiology, Western Health, Melbourne, Victoria, Australia; Monash University, Melbourne, Victoria, Australia
| | - Andre La Gerche
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia; Department of Cardiometabolic Health, The University of Melbourne, Melbourne, Victoria, Australia; National Centre for Sports Cardiology, St. Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia
| | - Thomas H Marwick
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia; Heart Center, Alfred Hospital, Melbourne, Victoria, Australia; Department of Cardiology, Western Health, Melbourne, Victoria, Australia; Monash University, Melbourne, Victoria, Australia; Department of Cardiometabolic Health, The University of Melbourne, Melbourne, Victoria, Australia.
| | - Julie R McMullen
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia; Monash University, Melbourne, Victoria, Australia; Department of Cardiometabolic Health, The University of Melbourne, Melbourne, Victoria, Australia; Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia.
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21
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Miranda DP, Alves WEFM, Lopes HHMC, Santana VJ, Bocchi EA, Salemi VMC. Association between right heart dimensions and muscle performance and cardiorespiratory capacity in strength and endurance athletes. TRANSLATIONAL SPORTS MEDICINE 2021. [DOI: 10.1002/tsm2.244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Douglas P. Miranda
- Heart Institute (InCor) do Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo Sao Paulo Brazil
- Laboratory of Physical Evaluation and Exercise Physiology (LAFFEX) Department of Physical Education University of Barretos (Unifeb) Barretos Brazil
| | | | | | - Vinícius J. Santana
- Laboratory of Physical Evaluation and Exercise Physiology (LAFFEX) Department of Physical Education University of Barretos (Unifeb) Barretos Brazil
| | - Edimar A. Bocchi
- Heart Institute (InCor) do Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo Sao Paulo Brazil
| | - Vera Maria C. Salemi
- Heart Institute (InCor) do Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo Sao Paulo Brazil
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22
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Foulkes S, Costello BT, Howden EJ, Janssens K, Dillon H, Toro C, Claus P, Fraser SF, Daly RM, Elliott DA, Conyers R, La Gerche A. Exercise cardiovascular magnetic resonance reveals reduced cardiac reserve in pediatric cancer survivors with impaired cardiopulmonary fitness. J Cardiovasc Magn Reson 2020; 22:64. [PMID: 32892749 PMCID: PMC7487601 DOI: 10.1186/s12968-020-00658-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 07/28/2020] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Pediatric cancer survivors are at increased risk of cardiac dysfunction and heart failure. Reduced peak oxygen consumption (peak VO2) is associated with impaired cardiac reserve (defined as the increase in cardiac function from rest to peak exercise) and heart failure risk, but it is unclear whether this relationship exists in pediatric cancer survivors. This study sought to investigate the presence of reduced peak VO2 in pediatric cancer survivors with increased risk of heart failure, and to assess its relationship with resting cardiac function and cardiac haemodynamics and systolic function during exercise. METHODS Twenty pediatric cancer survivors (8-24 years; 10 male) treated with anthracycline chemotherapy ± radiation underwent cardiopulmonary exercise testing to quantify peak VO2, with a value < 85% of predicted defined as impaired peak VO2. Resting cardiac function was assessed using 2- and 3-dimensional echocardiography, with cardiac reserve quantified from resting and peak exercise heart rate, stroke volume index (SVI) and cardiac index (CI) using exercise cardiovascular magnetic resonance (CMR). RESULTS Twelve of 20 survivors (60%) had reduced peak VO2 (70 ± 16% vs. 97 ± 14% of age and gender predicted). There were no differences in echocardiographic or CMR measurements of resting cardiac function between survivors with normal or impaired peak VO2. However, those with reduced peak VO2 had diminished cardiac reserve, with a lesser increase in CI and SVI during exercise (Interaction P < 0.01 for both), whilst the heart rate response was similar (P = 0.71). CONCLUSIONS Whilst exercise intolerance is common among pediatric cancer survivors, it is poorly explained by resting measures of cardiac function. In contrast, impaired exercise capacity is associated with impaired haemodynamics and systolic functional reserve measured during exercise. Consequently, measures of cardiopulmonary fitness and cardiac reserve may aid in early identification of survivors with heightened risk of long-term heart failure.
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Affiliation(s)
- Stephen Foulkes
- Department of Sports Cardiology, Baker Heart and Diabetes Institute, 75 Commercial Rd, Melbourne, VIC, 3004, Australia
- Institute for Physical Activity and Nutrition, Deakin University, Geelong, VIC, Australia
| | - Benedict T Costello
- Department of Sports Cardiology, Baker Heart and Diabetes Institute, 75 Commercial Rd, Melbourne, VIC, 3004, Australia
- Cardiology Department, St Vincent's Hospital Melbourne, Melbourne, VIC, Australia
| | - Erin J Howden
- Department of Sports Cardiology, Baker Heart and Diabetes Institute, 75 Commercial Rd, Melbourne, VIC, 3004, Australia
| | - Kristel Janssens
- Department of Sports Cardiology, Baker Heart and Diabetes Institute, 75 Commercial Rd, Melbourne, VIC, 3004, Australia
| | - Hayley Dillon
- Department of Sports Cardiology, Baker Heart and Diabetes Institute, 75 Commercial Rd, Melbourne, VIC, 3004, Australia
- Institute for Physical Activity and Nutrition, Deakin University, Geelong, VIC, Australia
| | - Claudia Toro
- Children's Cancer Centre, The Royal Children's Hospital, Melbourne, VIC, Australia
| | - Piet Claus
- Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | - Steve F Fraser
- Institute for Physical Activity and Nutrition, Deakin University, Geelong, VIC, Australia
| | - Robin M Daly
- Institute for Physical Activity and Nutrition, Deakin University, Geelong, VIC, Australia
| | - David A Elliott
- Children's Cancer Centre, The Royal Children's Hospital, Melbourne, VIC, Australia
- Murdoch Children's Research Institute, The Royal Children's Hospital, Melbourne, VIC, Australia
- Department of Paediatrics, University of Melbourne, Parkville, VIC, Australia
| | - Rachel Conyers
- Children's Cancer Centre, The Royal Children's Hospital, Melbourne, VIC, Australia
- Murdoch Children's Research Institute, The Royal Children's Hospital, Melbourne, VIC, Australia
- Medicine, Dentistry and Health Sciences, University of Melbourne, Parkville, VIC, Australia
| | - Andre La Gerche
- Department of Sports Cardiology, Baker Heart and Diabetes Institute, 75 Commercial Rd, Melbourne, VIC, 3004, Australia.
- Cardiology Department, St Vincent's Hospital Melbourne, Melbourne, VIC, Australia.
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Abstract
PURPOSE Zumba fitness (ZF) is a well-known exercise program involving dance and fitness. Despite its increasing popularity, no analysis has been conducted on studies focusing on the cardiovascular (CV) profile of women who performed this activity. The aim of this systematic review is to provide insights into the impact of ZF on women's CV health. METHODS Five clinical databases were searched. To be included, the articles had to include (1) women with or without CV risk factors (CVRF) and (2) CV-related outcomes resulting from a ZF program. RESULTS Ten studies (322 women; 181 healthy, 141 with CVRF) were included. In healthy women, low absolute effect sizes for maximal oxygen uptake ((Equation is included in full-text article.)O2max), anthropometric and body composition profile after 8 and 12 wk of ZF were found compared with nonparticipants. Moderate to large absolute effect sizes were recorded for (Equation is included in full-text article.)O2max and body composition following 40 wk of ZF. Findings proved promising but less consistent for ZF studies involving women with CVRF due to the absence of control groups. CONCLUSIONS Data describe ZF as feasible for healthy women and a promising fitness option for those with CVRF. Because of the low quality of the studies on women with CVRF and the overall small sample size along with discrepancies such as the average length of the studies on healthy women, cautious interpretation of the findings is recommended. Further investigations with a standardized design are needed to verify whether ZF may be considered as an alternative fitness option in primary prevention of CV disease in women.
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24
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Brown B, Millar L, Somauroo J, George K, Sharma S, La Gerche A, Forsythe L, Oxborough D. Left ventricular remodeling in elite and sub-elite road cyclists. Scand J Med Sci Sports 2020; 30:1132-1139. [PMID: 32187398 DOI: 10.1111/sms.13656] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 03/03/2020] [Accepted: 03/11/2020] [Indexed: 12/14/2022]
Abstract
Marked adaptation of left ventricular (LV) structure in endurance athletes is well established. However, previous investigations of functional and mechanical adaptation have been contradictory. A lack of clarity in subjects' athletic performance level may have contributed to these disparate findings. This study aimed to describe structural, functional, and mechanical characteristics of the cyclists' LV, based on clearly defined performance levels. Male elite cyclists (EC) (n = 69), sub-elite cyclists (SEC) (n = 30), and non-athletes (NA) (n = 46) were comparatively studied using conventional and speckle tracking 2D echocardiography. Dilated eccentric hypertrophy was common in EC (34.7%), but not SEC (3.3%). Chamber concentricity was higher in EC compared to SEC (7.11 ± 1.08 vs 5.85 ± 0.98 g/(mL)2/3 , P < .001). Ejection fraction (EF) was lower in EC compared to NA (57 ± 5% vs 59 ± 4%, P < .05), and reduced EF was observed in a greater proportion of EC (11.6%) compared to SEC (6.7%). Global circumferential strain (GCε) was greater in EC (-18.4 ± 2.4%) and SEC (-19.8 ± 2.7%) compared to NA (-17.2 ± 2.6%) (P < .05 and P < .001). Early diastolic filling was lower in EC compared with SEC (0.72 ± 0.14 vs 0.88 ± 0.12 cm/s, P < .001), as were septal E' (12 ± 2 vs 15 ± 2 cm/s, P < .001) and lateral E' (18 ± 4 vs 20 ± 4 cm/s, P < .05). The magnitude of LV structural adaptation was far greater in EC compared with SEC. Increased GCε may represent a compensatory mechanism to maintain stroke volume in the presence of increased chamber volume. Decreased E and E' velocities may be indicative of a considerable functional reserve in EC.
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Affiliation(s)
- Benjamin Brown
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - Lynne Millar
- Cardiovascular Sciences Research Centre, St Georges University of London, London, UK
| | - John Somauroo
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - Keith George
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - Sanjay Sharma
- Cardiovascular Sciences Research Centre, St Georges University of London, London, UK
| | - Andre La Gerche
- Sports Cardiology, Baker IDI Heart and Diabetes Institute, Melbourne, Vic., Australia
| | - Lynsey Forsythe
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - David Oxborough
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
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25
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Relationship between Cardiac Remodeling and Exercise Capacity in Elite Athletes: Incremental Value of Left Atrial Morphology and Function Assessed by Three-Dimensional Echocardiography. J Am Soc Echocardiogr 2020; 33:101-109.e1. [DOI: 10.1016/j.echo.2019.07.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 07/15/2019] [Accepted: 07/15/2019] [Indexed: 11/20/2022]
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26
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Sanz-de la Garza M, Vaquer-Seguí A, Durán K, Blanco I, Burgos F, Alsina X, Prat-González S, Bijnens B, Sitges M. Pulmonary transit of contrast during exercise is related to improved cardio-pulmonary performance in highly trained endurance athletes. Eur J Prev Cardiol 2019; 27:1504-1514. [PMID: 31801048 DOI: 10.1177/2047487319891779] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND The mechanisms underlying the high interindividual variability demonstrated for right-ventricular (RV) adaptation to exercise have not yet been identified, but different pulmonary vascular adaptations among individuals could be involved. Pulmonary transit of agitated saline (PTAS) during exercise has been demonstrated to be a good estimator of vascular reserve. AIM The aim of this study was to evaluate the presence of PTAS among endurance athletes (EAs) of both sexes and its influence on RV adaptation to exercise. METHODS A total of 100 highly trained EAs performed a maximal cardiopulmonary exercise test. Bi-ventricular functional and structural characteristics as well as PTAS were evaluated at baseline and at peak exercise. Athletes were distributed between two groups based on the amount of PTAS during exercise as high (HTPAS; >12 bubbles) and low (LPTAS; ≤12 bubbles). RESULTS Overall, 11 EAs exhibited an intra-cardiac shunt at rest and 1 met the criteria for chronic pulmonary disease and were excluded from the study. Among the remaining 88 EAs (51% women), 47 (53%) athletes were classified as HPTAS and 41 (47%) as LPTAS. HPTAS capability was associated with significantly larger RV contractile reserve, larger pulmonary vascular reserve and an enhanced maximal exercise capacity. On multivariate analysis, females were the only independent correlate of the HPTAS capability. CONCLUSION In highly trained endurance athletes, a HPTAS capability during exercise corresponded to an increase in pulmonary vascular and RV contractile reserves as well as an enhanced maximal exercise capacity. The long-term clinical or performance implications of the absence or presence of pulmonary shunting, and the subsequent RV afterload increase while performing exercise, remains to be determined.
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Affiliation(s)
| | | | - Karina Durán
- Cardiovascular Institute, Hospital Clínic, Barcelona, Spain
| | - Isabel Blanco
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Pulmonary Medicine Department, Hospital Clínic, University of Barcelona, Barcelona, Spain.,Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Barcelona, Spain
| | - Felip Burgos
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Pulmonary Medicine Department, Hospital Clínic, University of Barcelona, Barcelona, Spain.,Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Barcelona, Spain
| | - Xavier Alsina
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Pulmonary Medicine Department, Hospital Clínic, University of Barcelona, Barcelona, Spain.,Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Barcelona, Spain
| | - Susanna Prat-González
- Cardiovascular Institute, Hospital Clínic, Barcelona, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Bart Bijnens
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,ICREA, Barcelona, Spain
| | - Marta Sitges
- Cardiovascular Institute, Hospital Clínic, Barcelona, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Centro de Investigación Biomèdica en Red Enfermedades Cardiovasculares (CIBERCV), Barcelona, Spain
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27
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Guasch E, Mont L. Endurance training in young athletes: What happens in childhood, stays in childhood? Eur J Prev Cardiol 2019; 26:1998-2000. [PMID: 31426670 DOI: 10.1177/2047487319871649] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Eduard Guasch
- Cardiovascular Institute, Hospital Clínic, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red (CIBERCV), Madrid, Spain
| | - Lluís Mont
- Cardiovascular Institute, Hospital Clínic, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red (CIBERCV), Madrid, Spain
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28
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Csecs I, Czimbalmos C, Toth A, Dohy Z, Suhai IF, Szabo L, Kovacs A, Lakatos B, Sydo N, Kheirkhahan M, Peritz D, Kiss O, Merkely B, Vago H. The impact of sex, age and training on biventricular cardiac adaptation in healthy adult and adolescent athletes: Cardiac magnetic resonance imaging study. Eur J Prev Cardiol 2019; 27:540-549. [DOI: 10.1177/2047487319866019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Aims Physiological cardiac adaptation in athletes is influenced by multiple factors. This study aimed to investigate the impact of sex, age, body size, sports type and training volume on cardiac adaptation in healthy athletes with cardiac magnetic resonance imaging. Methods A total of 327 athletes (242 male) were studied (adults ≥18 years old; adolescents 14–18 years old). Left and right ventricular ejection fractions, end-diastolic volume, end-systolic volume, stroke volumes and masses were measured. Left ventricular end-diastolic volume/left ventricular mass, right ventricular end-diastolic volume/right ventricular mass and derived right/left ventricular ratios were determined to study balanced ventricular adaptation. Athletes were categorised as skill, power, mixed and endurance athletes. Results Male athletes had higher left and right ventricular volumes and masses in both adult ( n = 215 (145 male); 24 ± 5 years old) and adolescent ( n = 112 (97 male); 16 ± 1 years old) groups compared with women (all P < 0.05). In adults, male sex, age, body surface area, weekly training hours, mixed and endurance sports correlated with higher ventricular volumes and masses (all P < 0.05); and a combination of age, sex, training hours, endurance and mixed sports explained 30% of the variance of the left ventricular end-diastolic volume index ( r = 0.30), right ventricular end-diastolic volume index ( r = 0.34), right ventricular mass index ( r = 0.30); and as much as 53% of the left ventricular mass index ( r = 0.53) (all P < 0.0001). In adolescents, positive correlations were found between training hours and left ventricular hypertrophy ( r = 0.39, P < 0.0001), and biventricular dilation (left ventricular end-diastolic volume r = 0.34, P = 0.0008; right ventricular end-diastolic volume r = 0.36, P = 0.0004). In adolescents, age and body surface area did not correlate with cardiac magnetic resonance parameters. Conclusion There are significant sex differences in the physiological adaptation of adult and adolescent athlete’s heart; and male sex, higher training volume and endurance sports are major determinants of sports adaptation in adults.
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Affiliation(s)
- Ibolya Csecs
- Heart and Vascular Center, Semmelweis University, Hungary
| | | | - Attila Toth
- Heart and Vascular Center, Semmelweis University, Hungary
| | - Zsofia Dohy
- Heart and Vascular Center, Semmelweis University, Hungary
| | - Imre F Suhai
- Heart and Vascular Center, Semmelweis University, Hungary
| | - Liliana Szabo
- Heart and Vascular Center, Semmelweis University, Hungary
| | - Attila Kovacs
- Heart and Vascular Center, Semmelweis University, Hungary
| | - Balint Lakatos
- Heart and Vascular Center, Semmelweis University, Hungary
| | - Nora Sydo
- Heart and Vascular Center, Semmelweis University, Hungary
| | | | - David Peritz
- Cardiovascular Division, University of Utah, USA
| | - Orsolya Kiss
- Heart and Vascular Center, Semmelweis University, Hungary
| | - Bela Merkely
- Heart and Vascular Center, Semmelweis University, Hungary
| | - Hajnalka Vago
- Heart and Vascular Center, Semmelweis University, Hungary
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29
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Scott JM, Martin D, Ploutz-Snyder R, Downs M, Dillon EL, Sheffield-Moore M, Urban RJ, Ploutz-Snyder LL. Efficacy of Exercise and Testosterone to Mitigate Atrophic Cardiovascular Remodeling. Med Sci Sports Exerc 2019; 50:1940-1949. [PMID: 29570536 DOI: 10.1249/mss.0000000000001619] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE Early and consistent evaluation of cardiac morphology and function throughout an atrophic stimulus is critically important for the design and optimization of interventions. This randomized controlled trial was designed 1) to characterize the time course of unloading-induced morphofunctional remodeling and 2) to examine the effects of exercise with and without low-dose testosterone supplementation on cardiac biomarker, structural, and functional parameters during unloading. METHODS Twenty-six subjects completed 70 d of head-down tilt bed rest (BR): 9 were randomized to exercise training (Ex), 8 to EX and low-dose testosterone (ExT), and 9 remained sedentary (CONT). Exercise consisted of high-intensity, continuous, and resistance exercise. Cardiac morphology (left ventricular mass [LVM]) and mechanics (longitudinal, radial, and circumferential strain and twist), cardiovascular biomarkers, and cardiorespiratory fitness (V˙O2peak) were assessed before, during, and after BR. RESULTS Sedentary BR resulted in a progressive decline in LVM, longitudinal, radial, and circumferential strain in CONT, whereas Ex and ExT mitigated decreases in LVM and function. Twist was increased throughout BR in sedentary BR, whereas after an initial increase at BR7, there were no further changes in twist in Ex and ExT. HDL cholesterol was significantly decreased in all groups compared with pre-BR (P < 0.007). There were no significant changes in other cardiovascular biomarkers. Change in twist was significantly related to change in V˙O2max (R = 0.68, P < 0.01). CONCLUSION An integrated approach with evaluation of cardiac morphology, mechanics, V˙O2peak, and biomarkers provides extensive phenotyping of cardiovascular atrophic remodeling. Exercise training and exercise training with low-dose testosterone supplementation abrogates atrophic remodeling.
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30
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Heidbuchel H. The athlete's heart is a proarrhythmic heart, and what that means for clinical decision making. Europace 2019; 20:1401-1411. [PMID: 29244075 DOI: 10.1093/europace/eux294] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 08/25/2017] [Indexed: 12/19/2022] Open
Abstract
Recurring questions when dealing with arrhythmias in athletes are about the cause of the arrhythmia and, more importantly, about the eligibility of the athlete to continue sports activities. In essence, the relation between sports and arrhythmias can be understood along three lines: sports as arrhythmia trigger on top of an underlying problem, sports as arrhythmic substrate promotor, or sports as substrate inducer. Often, there is no sharp divider line between these entities. The athlete's heart, a heart that adapts so magically to cope with the demands of exercise, harbours many structural and functional changes that by themselves predispose to arrhythmia development, at the atrial, nodal and ventricular levels. In essence, the athlete's heart is a proarrhythmic heart. This review describes the changes in the athlete's heart that are related to arrhythmic expression and focuses on what this concept means for clinical decision making. The concept of the athlete's heart as a proarrhythmic heart creates a framework for evaluation and counselling of athletes, yet also highlights the difficulty in predicting the magnitude of associated risk. The management uncertainties are discussed for specific conditions like extreme bradycardic remodelling, atrioventricular nodal reentrant tachycardia, atrial fibrillation and flutter, and ventricular arrhythmias.
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Affiliation(s)
- Hein Heidbuchel
- Department of Cardiology, Antwerp University and University Hospital Antwerp, Wilrijkstraat 10, Edegem, Belgium
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31
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Lazic JS, Tadic M, Antic M, Radovanovic D, Nesic D, Rakocevic R, Mazic S. The relationship between right heart and aerobic capacity in large cohort of young elite athletes. Int J Cardiovasc Imaging 2019; 35:1027-1036. [DOI: 10.1007/s10554-019-01575-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 03/02/2019] [Indexed: 01/28/2023]
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32
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Cooke S, Samuel TJ, Cooper SM, Stöhr EJ. Adaptation of myocardial twist in the remodelled athlete's heart is not related to cardiac output. Exp Physiol 2018; 103:1456-1468. [DOI: 10.1113/ep087165] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Accepted: 09/10/2018] [Indexed: 12/16/2022]
Affiliation(s)
- Samuel Cooke
- Discipline of Physiology & Health; Cardiff School of Sport & Health Sciences (Sport); Cardiff Metropolitan University; Cardiff UK
| | - T. Jake Samuel
- Discipline of Physiology & Health; Cardiff School of Sport & Health Sciences (Sport); Cardiff Metropolitan University; Cardiff UK
| | - Stephen-Mark Cooper
- Discipline of Physiology & Health; Cardiff School of Sport & Health Sciences (Sport); Cardiff Metropolitan University; Cardiff UK
| | - Eric J. Stöhr
- Discipline of Physiology & Health; Cardiff School of Sport & Health Sciences (Sport); Cardiff Metropolitan University; Cardiff UK
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33
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Lakatos BK, Kiss O, Tokodi M, Tősér Z, Sydó N, Merkely G, Babity M, Szilágyi M, Komócsin Z, Bognár C, Kovács A, Merkely B. Exercise-induced shift in right ventricular contraction pattern: novel marker of athlete's heart? Am J Physiol Heart Circ Physiol 2018; 315:H1640-H1648. [PMID: 30216120 DOI: 10.1152/ajpheart.00304.2018] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Data about the functional adaptation of the right ventricle (RV) to intense exercise are limited. Our aim was to characterize the RV mechanical pattern in top-level athletes using three-dimensional echocardiography. A total of 60 elite water polo athletes (19 ± 4 yr, 17 ± 6 h of training/wk, 50% women and 50% men) and 40 healthy sedentary control subjects were enrolled. We measured the RV end-diastolic volume index (RVEDVi) and ejection fraction (RVEF) using dedicated software. Furthermore, we determined RV global longitudinal (RV GLS) and circumferential strain (RV GCS) and the relative contribution of longitudinal ejection fraction (LEF) and radial ejection fraction (REF) to RVEF using the ReVISION method. Athletes also underwent cardiopulmonary exercise testing [O2 consumption (V̇o2)/kg]. Athletes had significantly higher RVEDVi compared with control subjects (athletes vs. control subjects, 88 ± 11 vs. 65 ± 10 ml/m2, P < 0.001); however, they also demonstrated lower RVEF (56 ± 4% vs. 61 ± 5%, P < 0.001). RV GLS was comparable between the two groups (-22 ± 5% vs. -23 ± 5%, P = 0.24), whereas RV GCS was significantly lower in athletes (-21 ± 4% vs. -26 ± 7%, P < 0.001). Athletes had higher LEF and lower REF contribution to RVEF (LEF/RVEF: 0.50 ± 0.07 vs. 0.42 ± 0.07, P < 0.001; REF/RVEF: 0.33 ± 0.08 vs. 0.45 ± 0.08, P < 0.001). Moreover, the pattern of RV functional shift correlated with V̇o2/kg (LEF/RVEF: r = 0.30, P < 0.05; REF/RVEF: r = -0.27, P < 0.05). RV mechanical adaptation to long-term intense exercise implies a functional shift; the relative contribution of longitudinal motion to global function was increased, whereas the radial shortening was significantly decreased, in athletes. Moreover, this functional pattern correlates with aerobic exercise performance, representing a potential new resting marker of an athlete's heart. NEW & NOTEWORTHY Intensive regular physical exercise results in significant changes of right ventricular morphology and function. By separate quantification of the right ventricular longitudinal and radial function, a relative dominance of longitudinal motion and a decrease in radial motion can be observed compared with sedentary controls. Moreover, this contraction pattern correlates with cardiopulmonary fitness. According to these results, this functional shift of the right ventricle may represent a novel marker of an athlete's heart.
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Affiliation(s)
| | - Orsolya Kiss
- Semmelweis University Heart and Vascular Center , Budapest , Hungary
| | - Márton Tokodi
- Semmelweis University Heart and Vascular Center , Budapest , Hungary
| | | | - Nóra Sydó
- Semmelweis University Heart and Vascular Center , Budapest , Hungary
| | - Gergő Merkely
- Semmelweis University Heart and Vascular Center , Budapest , Hungary.,Department of Orthopaedics, Uzsoki Hospital , Budapest , Hungary
| | - Máté Babity
- Semmelweis University Heart and Vascular Center , Budapest , Hungary
| | - Mónika Szilágyi
- Semmelweis University Heart and Vascular Center , Budapest , Hungary
| | | | - Csaba Bognár
- Semmelweis University Heart and Vascular Center , Budapest , Hungary
| | - Attila Kovács
- Semmelweis University Heart and Vascular Center , Budapest , Hungary
| | - Béla Merkely
- Semmelweis University Heart and Vascular Center , Budapest , Hungary
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34
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Rundqvist L, Engvall J, Faresjö M, Blomstrand P. Left ventricular diastolic function is enhanced after peak exercise in endurance-trained adolescents as well as in their non-trained controls. Clin Physiol Funct Imaging 2018; 38:1054-1061. [PMID: 29947056 DOI: 10.1111/cpf.12534] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 05/29/2018] [Indexed: 11/30/2022]
Abstract
The aims of the study were to explore the temporal change of cardiac function after peak exercise in adolescents, and to investigate how these functional changes relate to maximal oxygen uptake (VO2max ). The cohort consisted of 27 endurance-trained adolescents aged 13-19 years, and 27 controls individually matched by age and gender. Standard echocardiography and colour tissue Doppler were performed at rest, and immediately after as well as 15 min after a maximal cardio pulmonary exercise test (CPET) on a treadmill. The changes in systolic and diastolic parameters after exercise compared to baseline were similar in both groups. The septal E/e'-ratio increased immediately after exercise in both the active and the control groups (from 9·2 to 11·0; P<0·001, and from 8·7 to 10·2; P = 0·008, respectively). In a comparison between the two groups after CPET, the septal E/e'-ratio was higher in the active group both immediately after exercise and 15 min later compared to the control group (P = 0·007 and P = 0·006, respectively). We demonstrated a positive correlation between VO2max and cardiac function including LVEF and E/e' immediately after CPET, but the strongest correlation was found between VO2max and LVEDV (r = 0·67, P<0·001) as well as septal E/e' (r = 0·34, P = 0·013). Enhanced diastolic function was found in both groups, but this was more pronounced in active adolescents. The cardiac functional response to exercise, in terms of LVEF and E/e', correlates with the increase in VO2 uptake. These findings in trained as well as un-trained teenagers have practical implications when assessing cardiac function.
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Affiliation(s)
- Louise Rundqvist
- Department of Natural Science and Biomedicine, School of Health and Welfare, Jönköping University, Jönköping, Sweden
| | - Jan Engvall
- Department of Clinical Physiology, Linköping University, Linköping, Sweden
- Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
- Centre for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden
| | - Maria Faresjö
- Department of Natural Science and Biomedicine, School of Health and Welfare, Jönköping University, Jönköping, Sweden
- The Academy of Health and Care, Region Jönköping County, Jönköping, Sweden
| | - Peter Blomstrand
- Department of Natural Science and Biomedicine, School of Health and Welfare, Jönköping University, Jönköping, Sweden
- Department of Clinical Physiology, Region Jönköping County, Jönköping, Sweden
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35
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Elliott AD, Mahajan R, Linz D, Stokes M, Verdicchio CV, Middeldorp ME, La Gerche A, Lau DH, Sanders P. Atrial remodeling and ectopic burden in recreational athletes: Implications for risk of atrial fibrillation. Clin Cardiol 2018; 41:843-848. [PMID: 29671875 DOI: 10.1002/clc.22967] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 04/16/2018] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Atrial remodeling, vagal tone, and atrial ectopic triggers are suggested to contribute to increased incidence of atrial fibrillation (AF) in endurance athletes. How these parameters change with increased lifetime training hours is debated. HYPOTHESIS Atrial remodeling occurs in proportion to total training history, thus contributing to elevated risk of AF. METHODS We recruited 99 recreational endurance athletes, subsequently grouped according to lifetime training hours, to undergo evaluation of atrial size, autonomic modulation, and atrial ectopy. Athletes were grouped by self-reported lifetime training hours: low (<3000 h), medium (3000-6000 h), and high (>6000 h). Left atrial (LA) volume, left ventricular (LV) dimensions, and LV systolic and diastolic function were assessed by echocardiography. We used 48-hour ambulatory electrocardiographic monitoring to determine heart rate, heart rate variability, premature atrial contractions, and premature ventricular contractions. RESULTS LA volume was significantly greater in the high (+5.1 mL/m2 , 95% CI: 1.3-8.9) and medium (+4.2 mL/m2 , 95% CI: 0.2-8.1) groups, compared with the low group. LA dilation was observed in 19.4%, 12.9%, and 0% of the high, medium, and low groups, respectively (P = 0.05). No differences were observed between groups for measures of LV dimensions or function. Minimum heart rate, parasympathetic tone expressed using heart rate variability indices, and premature atrial contraction and premature ventricular contraction frequencies did not differ between groups. CONCLUSIONS In recreational endurance athletes, increased lifetime training is associated with LA dilation in the absence of increased vagal parameters or atrial ectopy, which may promote incidence of AF in this cohort.
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Affiliation(s)
- Adrian D Elliott
- Centre for Heart Rhythm Disorders, South Australian Health & Medical Research Institute, University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia
| | - Rajiv Mahajan
- Centre for Heart Rhythm Disorders, South Australian Health & Medical Research Institute, University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia
| | - Dominik Linz
- Centre for Heart Rhythm Disorders, South Australian Health & Medical Research Institute, University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia
| | - Michael Stokes
- Centre for Heart Rhythm Disorders, South Australian Health & Medical Research Institute, University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia
| | - Christian V Verdicchio
- Centre for Heart Rhythm Disorders, South Australian Health & Medical Research Institute, University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia
| | - Melissa E Middeldorp
- Centre for Heart Rhythm Disorders, South Australian Health & Medical Research Institute, University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia
| | - Andre La Gerche
- Sports Cardiology Lab, Baker Heart and Diabetes Institute, Melbourne, Australia.,Department of Cardiology, St Vincent's Hospital Melbourne, Fitzroy, Australia.,Department of Cardiovascular Medicine, University of Leuven, Leuven, Belgium
| | - Dennis H Lau
- Centre for Heart Rhythm Disorders, South Australian Health & Medical Research Institute, University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia
| | - Prashanthan Sanders
- Centre for Heart Rhythm Disorders, South Australian Health & Medical Research Institute, University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia
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La Gerche A, Rakhit DJ, Claessen G. Exercise and the right ventricle: a potential Achilles' heel. Cardiovasc Res 2018; 113:1499-1508. [PMID: 28957535 DOI: 10.1093/cvr/cvx156] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 08/08/2017] [Indexed: 11/13/2022] Open
Abstract
Exercise is associated with unequivocal health benefits and results in many structural and functional changes of the myocardium that enhance performance and prevent heart failure. However, intense exercise also presents a significant hemodynamic challenge in which the right-sided heart chambers are exposed to a disproportionate increase in afterload and wall stress that can manifest as myocardial fatigue or even damage if intense exercise is sustained for prolonged periods. This review focuses on the physiological factors that result in a disproportionate load on the right ventricle during exercise and the long-term consequences. The changes in cardiac structure and function that define 'athlete's heart' disproportionately affect the right-sided heart chambers and this can raise important diagnostic overlap with some cardiac pathologies, particularly some inherited cardiomyopathies. The interaction between exercise and arrhythmogenic right ventricular cardiomyopathy (ARVC) will be highlighted as an important example of how hemodynamic stressors can combine with deficiencies in cardiac structural elements to cause cardiac dysfunction predisposing to arrhythmias. The extent to which extreme exercise can cause adverse remodelling in the absence of a genetic predisposition remains controversial. In the athlete with profound changes in heart structure, it can be extremely challenging to determine whether common symptoms such as palpitations may be a marker of more sinister arrhythmias. This review discusses some of the techniques that have recently been proposed to identify pathology in these circumstances. Finally, we will discuss recent evidence defining the role of exercise restriction as a therapeutic intervention in individuals predisposed to arrhythmogenic cardiomyopathy.
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Affiliation(s)
- Andre La Gerche
- Sports Cardiology and Cardiac Magnetic Resonance Imaging Lab, Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, Victoria 3004, Australia.,Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium.,Cardiology Department, St Vincent's Hospital, Melbourne, Australia
| | - Dhrubo J Rakhit
- Sports Cardiology and Cardiac Magnetic Resonance Imaging Lab, Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, Victoria 3004, Australia.,Cardiovascular Imaging Department, Southampton University Hospital, Southampton, UK
| | - Guido Claessen
- Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
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Rundqvist L, Engvall J, Faresjö M, Carlsson E, Blomstrand P. Regular endurance training in adolescents impacts atrial and ventricular size and function. Eur Heart J Cardiovasc Imaging 2018; 18:681-687. [PMID: 27406576 DOI: 10.1093/ehjci/jew150] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 06/23/2016] [Indexed: 12/24/2022] Open
Abstract
Aims The aims of the study were to explore the effects of long-term endurance exercise on atrial and ventricular size and function in adolescents and to examine whether these changes are related to maximal oxygen uptake (VO2max). Methods and results Twenty-seven long-term endurance-trained adolescents aged 13-19 years were individually matched by age and gender with 27 controls. All participants, 22 girls and 32 boys, underwent an echocardiographic examination at rest, including standard and colour tissue Doppler investigation. VO2max was assessed during treadmill exercise. All heart dimensions indexed for body size were larger in the physically active group compared with controls: left ventricular end-diastolic volume 60 vs. 50 mL/m2 (P <0.001), left atrial volume 27 vs. 19 mL/m2 (P < 0.001), and right ventricular (RV) and right atrial area 15 vs. 13 and 9 vs. 7 cm2/m2, respectively (P <0.001 for both). There were strong associations between the size of the cardiac chambers and VO2max. Further, we found improved systolic function in the active group compared with controls: left ventricular ejection fraction 61 vs. 59% (P= 0.036), tricuspid annular plane systolic excursion 12 vs. 10 mm/m2 (P= 0.008), and RV early peak systolic velocity s' 11 vs. 10 cm/s (P = 0.031). Conclusion Cardiac remodelling to long-term endurance exercise in adolescents is manifested by an increase in atrial as well as ventricular dimensions. The physically active group also demonstrated functional remodelling with an increase in TAPSE and systolic RV wall velocity. These findings have practical implications when assessing cardiac enlargement and function in physically active youngsters.
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Affiliation(s)
- Louise Rundqvist
- Department of Natural Science and Biomedicine, School of Health and Welfare, Jönköping University, P.O Box 1026, Jönköping SE-551 11, Sweden
| | - Jan Engvall
- Department of Clinical Physiology, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
- Centre for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden
| | - Maria Faresjö
- Department of Natural Science and Biomedicine, School of Health and Welfare, Jönköping University, P.O Box 1026, Jönköping SE-551 11, Sweden
| | - Emma Carlsson
- Department of Natural Science and Biomedicine, School of Health and Welfare, Jönköping University, P.O Box 1026, Jönköping SE-551 11, Sweden
| | - Peter Blomstrand
- Department of Natural Science and Biomedicine, School of Health and Welfare, Jönköping University, P.O Box 1026, Jönköping SE-551 11, Sweden
- Department of Clinical Physiology, Region Jönköping County, Jönköping, Sweden
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Exercise capacity in diabetes mellitus is predicted by activity status and cardiac size rather than cardiac function: a case control study. Cardiovasc Diabetol 2018; 17:44. [PMID: 29571290 PMCID: PMC5866526 DOI: 10.1186/s12933-018-0688-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 03/17/2018] [Indexed: 12/22/2022] Open
Abstract
Background The reasons for reduced exercise capacity in diabetes mellitus (DM) remains incompletely understood, although diastolic dysfunction and diabetic cardiomyopathy are often favored explanations. However, there is a paucity of literature detailing cardiac function and reserve during incremental exercise to evaluate its significance and contribution. We sought to determine associations between comprehensive measures of cardiac function during exercise and maximal oxygen consumption (\documentclass[12pt]{minimal}
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\begin{document}$$\dot{V}O_{2}$$\end{document}V˙O2peak), with the hypothesis that the reduction in exercise capacity and cardiac function would be associated with co-morbidities and sedentary behavior rather than diabetes itself. Methods This case–control study involved 60 subjects [20 with type 1 DM (T1DM), 20 T2DM, and 10 healthy controls age/sex-matched to each diabetes subtype] performing cardiopulmonary exercise testing and bicycle ergometer echocardiography studies. Measures of biventricular function were assessed during incremental exercise to maximal intensity. Results T2DM subjects were middle-aged (52 ± 11 years) with a mean T2DM diagnosis of 12 ± 7 years and modest glycemic control (HbA1c 57 ± 12 mmol/mol). T1DM participants were younger (35 ± 8 years), with a 19 ± 10 year history of T1DM and suboptimal glycemic control (HbA1c 65 ± 16 mmol/mol). Participants with T2DM were heavier than their controls (body mass index 29.3 ± 3.4 kg/m2 vs. 24.7 ± 2.9, P = 0.001), performed less exercise (10 ± 12 vs. 28 ± 30 MET hours/week, P = 0.031) and had lower exercise capacity (\documentclass[12pt]{minimal}
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\begin{document}$$\dot{V}O_{2}$$\end{document}V˙O2peak = 26 ± 6 vs. 38 ± 8 ml/min/kg, P < 0.0001). These differences were not associated with biventricular systolic or left ventricular (LV) diastolic dysfunction at rest or during exercise. There was no difference in weight, exercise participation or \documentclass[12pt]{minimal}
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\begin{document}$$\dot{V}O_{2}$$\end{document}V˙O2peak in T1DM subjects as compared to their controls. After accounting for age, sex and body surface area in a multivariate analysis, significant positive predictors of \documentclass[12pt]{minimal}
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\begin{document}$$\dot{V}O_{2}$$\end{document}V˙O2peak were cardiac size (LV end-diastolic volume, LVEDV) and estimated MET-hours, while T2DM was a negative predictor. These combined factors accounted for 80% of the variance in \documentclass[12pt]{minimal}
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\begin{document}$$\dot{V}O_{2}$$\end{document}V˙O2peak (P < 0.0001). Conclusions Exercise capacity is reduced in T2DM subjects relative to matched controls, whereas exercise capacity is preserved in T1DM. There was no evidence of sub-clinical cardiac dysfunction but, rather, there was an association between impaired exercise capacity, small LV volumes and sedentary behavior.
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Abstract
Exercise and competitive sports should be associated with a wide range of health benefits with the potential to inspire a positive community health legacy. However, the reputation of sports is being threatened by an ever-expanding armamentarium of agents with real or perceived benefits in performance enhancement. In addition to the injustice of unfair advantage for dishonest athletes, significant potential health risks are associated with performance-enhancing drugs. Performance-enhancing drugs may have an effect on the cardiovascular system by means of directly altering the myocardium, vasculature, and metabolism. However, less frequently considered is the potential for indirect effects caused through enabling athletes to push beyond normal physiological limits with the potential consequence of exercise-induced arrhythmias. This review will summarize the known health effects of PEDs but will also focus on the potentially greater health threat posed by the covert search for performance-enhancing agents that have yet to be recognized by the World Anti-Doping Agency. History has taught us that athletes are subjected to unmonitored trials with experimental drugs that have little or no established efficacy or safety data. One approach to decrease drug abuse in sports would be to accept that there is a delay from when athletes start experimenting with novel agents to the time when authorities become aware of these drugs. This provides a window of opportunity for athletes to exploit with relative immunity. It could be argued that all off-label use of any agent should be deemed illegal.
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Abstract
The cardiovascular benefits of habitual exercise are well documented. In the current era, more of the population is exceeding the recommendations for physical activity as the popularity of endurance events increases. Recent data have proposed a U-shaped relationship between exercise intensity and cardiovascular outcomes. Regular participation in endurance activities has been shown to result in structural and functional changes in the heart. This re-modelling may be the substrate for cardiac dysfunction or arrhythmias. The risk of sudden cardiac death may also be elevated; however, in most cases of sudden cardiac death, the cause can be linked to an underlying cardiac pathology where exercise acted as the trigger for a lethal arrhythmia. This article serves to review whether excessive exercise may result in harm in some athletes.
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Beaudry R, Haykowsky MJ, Baggish A, La Gerche A. A Modern Definition of the Athlete’s Heart—for Research and the Clinic. Cardiol Clin 2016; 34:507-514. [DOI: 10.1016/j.ccl.2016.06.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lo Iudice F, Petitto M, Ferrone M, Esposito R, Vaccaro A, Buonauro A, D'Andrea A, Trimarco B, Galderisi M. Determinants of myocardial mechanics in top-level endurance athletes: three-dimensional speckle tracking evaluation. Eur Heart J Cardiovasc Imaging 2016:jew122. [DOI: 10.1093/ehjci/jew122] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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43
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La Gerche A. The Potential Cardiotoxic Effects of Exercise. Can J Cardiol 2016; 32:421-8. [DOI: 10.1016/j.cjca.2015.11.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 11/05/2015] [Accepted: 11/05/2015] [Indexed: 11/17/2022] Open
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Kinoshita N, Katsukawa F, Yamazaki H. Modeling of Longitudinal Changes in Left Ventricular Dimensions among Female Adolescent Runners. PLoS One 2015; 10:e0140573. [PMID: 26469336 PMCID: PMC4607476 DOI: 10.1371/journal.pone.0140573] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 09/26/2015] [Indexed: 11/18/2022] Open
Abstract
PURPOSE Left ventricular (LV) enlargement has been linked to sudden cardiac death among young athletes. This study aimed to model the effect of long-term incessant endurance training on LV dimensions in female adolescent runners. METHODS Japanese female adolescent competitive distance runners (n = 36, age: 15 years, height: 158.1 ± 4.6 cm, weight: 44.7 ± 6.1 kg, percent body fat: 17.0 ± 5.2%) underwent echocardiography and underwater weighing every 6 months for 3 years. Since the measurement occasions varied across subjects, multilevel analysis was used for curvilinear modeling of changes in running performance (velocities in 1500 m and 3000 m track race), maximal oxygen uptake (VO2max), body composition, and LV dimensions. RESULTS Initially, LV end-diastolic dimension (LVEDd) and LV mass were 47.0 ± 3.0 mm and 122.6 ± 15.7 g, respectively. Running performance and VO2max improved along with the training duration. The trends of changes in fat-free mass (FFM) and LVEDd were similarly best described by quadratic polynomials. LVEDd did not change over time in the model including FFM as a covariate. Increases in LV wall thicknesses were minimal and independent of FFM. LV mass increased according to a quadratic polynomial trend even after adjusting for FFM. CONCLUSIONS FFM was an important factor determining changes in LVEDd and LV mass. Although running performance and VO2max were improved by continued endurance training, further LV cavity enlargement hardly occurred beyond FFM gain in these adolescent female runners, who already demonstrated a large LVEDd.
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Affiliation(s)
- Norimitsu Kinoshita
- Faculty of Sports and Health Studies, Hosei University, Machida, Tokyo, Japan
- * E-mail:
| | - Fuminori Katsukawa
- Sports Medicine Research Center, Keio University, Yokohama, Kanagawa, Japan
| | - Hajime Yamazaki
- Sports Medicine Research Center, Keio University, Yokohama, Kanagawa, Japan
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La Gerche A, Roberts T, Claessen G. The response of the pulmonary circulation and right ventricle to exercise: exercise-induced right ventricular dysfunction and structural remodeling in endurance athletes (2013 Grover Conference series). Pulm Circ 2015; 4:407-16. [PMID: 25621154 DOI: 10.1086/677355] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 01/22/2014] [Indexed: 02/03/2023] Open
Abstract
There is unequivocal evidence that exercise results in considerable health benefits. These are the result of positive hormonal, metabolic, neuronal, and structural changes brought about by the intermittent physiological challenge of exercise. However, there is evolving evidence that intense exercise may place disproportionate physiological stress on the right ventricle (RV) and the pulmonary circulation. Both echocardiographic and invasive studies are consistent in demonstrating that pulmonary arterial pressures increase progressively with exercise intensity, such that the harder one exercises, the greater the load on the RV. This disproportionate load can result in fatigue or damage of the RV if the intensity and duration of exercise is sufficiently prolonged. This is distinctly different from the load imposed by exercise on the left ventricle (LV), which is moderated by a greater capacity for reductions in systemic afterload. Finally, given the increasing RV demand during exercise, it may be hypothesized that chronic exercise-induced cardiac remodeling (the so-called athlete's heart) may also disproportionately affect the RV. Indeed, there is evidence, although somewhat inconsistent, that RV volume increases may be relatively greater than those for the LV. Perhaps more importantly, there is a suggestion that chronic endurance exercise may cause electrical remodeling, predisposing some athletes to serious arrhythmias originating from the RV. Thus, a relatively consistent picture is emerging of acute stress, prolonged fatigue, and long-term remodeling, which all disproportionately affect the RV. Thus, we contend that the RV should be considered a potential Achilles' heel of the exercising heart.
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Affiliation(s)
- André La Gerche
- Department of Medicine, St Vincent's Hospital, University of Melbourne, Fitzroy, Australia ; Department of Cardiovascular Medicine, University of Leuven, Leuven, Belgium
| | - Timothy Roberts
- Department of Medicine, St Vincent's Hospital, University of Melbourne, Fitzroy, Australia
| | - Guido Claessen
- Department of Cardiovascular Medicine, University of Leuven, Leuven, Belgium
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Stembridge M, Ainslie PN, Shave R. Short-term adaptation and chronic cardiac remodelling to high altitude in lowlander natives and Himalayan Sherpa. Exp Physiol 2014; 100:1242-6. [PMID: 26575341 DOI: 10.1113/expphysiol.2014.082503] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 10/13/2014] [Indexed: 11/08/2022]
Abstract
NEW FINDINGS What is the topic of this review? At high altitude, the cardiovascular system must adapt in order to meet the metabolic demand for oxygen. This review summarizes recent findings relating to short-term and life-long cardiac adaptation to high altitude in the context of exercise capacity. What advances does it highlight? Both Sherpa and lowlanders exhibit smaller left ventricular volumes at high altitude; however, myocardial relaxation, as evidenced by diastolic untwist, is reduced only in Sherpa, indicating that short-term hypoxia does not impair diastolic relaxation. Potential remodelling of systolic function, as evidenced by lower left ventricular systolic twist in Sherpa, may facilitate the requisite sea-level mechanical reserve required during exercise, although this remains to be confirmed. Both short-term and life-long high-altitude exposure challenge the cardiovascular system to meet the metabolic demand for O2 in a hypoxic environment. As the demand for O2 delivery increases during exercise, the circulatory component of oxygen transport is placed under additional stress. Acute adaptation and chronic remodelling of cardiac structure and function may occur to facilitate O2 delivery in lowlanders during sojourn to high altitude and in permanent highland residents. However, our understanding of cardiac structural and functional adaption in Sherpa remains confined to a higher maximal heart rate, lower pulmonary vascular resistance and no differences in resting cardiac output. Ventricular form and function are intrinsically linked through the left ventricular (LV) mechanics that facilitate efficient ejection, minimize myofibre stress during contraction and aid diastolic recoil. Recent examination of LV mechanics has allowed detailed insight into fundamental cardiac adaptation in high-altitude Sherpa. In this symposium report, we review recent advances in our understanding of LV function in both lowlanders and Sherpa at rest and discuss the potential consequences for exercise capacity. Collectively, data indicate chronic structural ventricular adaptation, with adult Sherpa having smaller absolute and relative LV size. Consistent with structural remodelling, cardiac mechanics also differ in Sherpa when compared with lowlanders at high altitude. These differences are characterized by a reduction in resting systolic deformation and slower diastolic untwisting, a surrogate of relaxation. These changes may reflect a functional cardiac adaptation that affords Sherpa the same mechanical reserve seen in lowlanders at sea level, which is absent when they ascend to high altitude.
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Affiliation(s)
- Mike Stembridge
- Cardiff School of Sport, Cardiff Metropolitan University, Cardiff, UK
| | - Philip N Ainslie
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, Okanagan Campus, Kelowna, British Columbia, Canada
| | - Rob Shave
- Cardiff School of Sport, Cardiff Metropolitan University, Cardiff, UK
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Affiliation(s)
- André La Gerche
- From St. Vincent's Hospital Department of Medicine, University of Melbourne, Fitzroy, Australia (A.L.G.); and Heart Center, Jessa Hospital, Hasselt, Belgium (H.H.).
| | - Hein Heidbuchel
- From St. Vincent's Hospital Department of Medicine, University of Melbourne, Fitzroy, Australia (A.L.G.); and Heart Center, Jessa Hospital, Hasselt, Belgium (H.H.)
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Diastolic Stress Echocardiography in the Young: A Study in Nonathletic and Endurance-Trained Healthy Subjects. J Am Soc Echocardiogr 2014; 27:1053-9. [DOI: 10.1016/j.echo.2014.06.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Indexed: 11/20/2022]
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49
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Utomi V, Oxborough D, Ashley E, Lord R, Fletcher S, Stembridge M, Shave R, Hoffman MD, Whyte G, Somauroo J, Sharma S, George K. Predominance of normal left ventricular geometry in the male ‘athlete's heart’. Heart 2014; 100:1264-71. [DOI: 10.1136/heartjnl-2014-305904] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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50
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Stembridge M, Ainslie PN, Hughes MG, Stöhr EJ, Cotter JD, Nio AQX, Shave R. Ventricular structure, function, and mechanics at high altitude: chronic remodeling in Sherpa vs. short-term lowlander adaptation. J Appl Physiol (1985) 2014; 117:334-43. [PMID: 24876358 DOI: 10.1152/japplphysiol.00233.2014] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Short-term, high-altitude (HA) exposure raises pulmonary artery systolic pressure (PASP) and decreases left-ventricular (LV) volumes. However, relatively little is known of the long-term cardiac consequences of prolonged exposure in Sherpa, a highly adapted HA population. To investigate short-term adaptation and potential long-term cardiac remodeling, we studied ventricular structure and function in Sherpa at 5,050 m (n = 11; 31 ± 13 yr; mass 68 ± 10 kg; height 169 ± 6 cm) and lowlanders at sea level (SL) and following 10 ± 3 days at 5,050 m (n = 9; 34 ± 7 yr; mass 82 ± 10 kg; height 177 ± 6 cm) using conventional and speckle-tracking echocardiography. At HA, PASP was higher in Sherpa and lowlanders compared with lowlanders at SL (both P < 0.05). Sherpa had smaller right-ventricular (RV) and LV stroke volumes than lowlanders at SL with lower RV systolic strain (P < 0.05) but similar LV systolic mechanics. In contrast to LV systolic mechanics, LV diastolic, untwisting velocity was significantly lower in Sherpa compared with lowlanders at both SL and HA. After partial acclimatization, lowlanders demonstrated no change in the RV end-diastolic area; however, both RV strain and LV end-diastolic volume were reduced. In conclusion, short-term hypoxia induced a reduction in RV systolic function that was also evident in Sherpa following chronic exposure. We propose that this was consequent to a persistently higher PASP. In contrast to the RV, remodeling of LV volumes and normalization of systolic mechanics indicate structural and functional adaptation to HA. However, altered LV diastolic relaxation after chronic hypoxic exposure may reflect differential remodeling of systolic and diastolic LV function.
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Affiliation(s)
- Mike Stembridge
- Cardiff School of Sport, Cardiff Metropolitan University, Cardiff, United Kingdom;
| | - Philip N Ainslie
- School of Health and Exercise Sciences, University of British Columbia Okanagan Campus, Kelowna, Canada; and
| | - Michael G Hughes
- Cardiff School of Sport, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Eric J Stöhr
- Cardiff School of Sport, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - James D Cotter
- School of Sport and Exercise Sciences, University of Otago, Dunedin, New Zealand
| | - Amanda Q X Nio
- Cardiff School of Sport, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Rob Shave
- Cardiff School of Sport, Cardiff Metropolitan University, Cardiff, United Kingdom
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