Patients with Chagas cardiomyopathy (ChC) could have a significant reduction in functional capacity (FC). This study aimed to report the effect of a 24-week combined physical exercise program on the FC of a patient with ChC. Methods: A woman, 44 years old, with positive serology for ChC in stage B2 has submitted the following assessments: i) Physical assessment: ii) Cardiopulmonary exercise test; iii) Test of 1-maximum Repetition, iv) Evaluation of cardiac autonomic modulation by heart rate variability (HRV). Results: The results obtained revealed a reduction in the anthropometric parameters and the SBP after training. Additionally, we observed an improvement in FC (aerobic and strength condiction) and cardiac autonomic modulation after 24 weeks of combined training. Conclusion: Our findings show that of a 24-week combined physical exercise program improved either FC or HRVof the patient with ChC.
Background
The peak oxygen uptake (VO2peak) is considered the most reliable parameter for evaluating cardiorespiratory fitness and guiding physical training. However, not everyone has access to VO2peak measurements. As a more accessible alternative, heart rate (HR) variables have emerged.
Aim
To explore the correlation between HR responses during rest, exercise, recovery, and VO2peak.
Methods
Thirteen healthy men participated in the study. Resting HR variability and parameters were recorded for 10 minutes using a heart rate monitor while participants were seated. A maximal intermittent treadmill test was conducted to determine the maximum rate of HR increase (rHRI) and obtain VO2peak data (33.53 ± 8.22 mL/kg/min). The test speed was set based on the International Physical Activity Questionnaire (IPAQ) classification: 8 km/h for inactive or insufficiently active individuals, and 10 km/h for active and highly active individuals. Additionally, HR recovery (HRR) was measured during a 10-minute seated recovery period.
Results
Significant correlations were observed between resting HR (r = -0.78, p = 0.001), average RR interval (iRR) (r = 0.73, p = 0.004), percentage of iRR differences exceeding 50 ms (pNN50) (r = 0.64, p = 0.001), HR (r = -0.60, p = 0.003), and VO2peak. However, no significant correlation was found between rHRI and VO2peak (r = 0.38, p = 0.2).
Conclusion
Resting HR parameters, HR variability, and HRR showed significant associations with VO2peak. These HR variables can be useful alternatives for assessing and prescribing physical training when direct measurement of VO2peak is not feasible.
Chronic heart failure (CHF) is a complex syndrome characterized by dyspnea, exercise intolerance, and qualityof-life impairment. The compensatory physiological mechanisms of this disease may promote muscle wasting and reduction in muscle strength, which are independent predictors of mortality. Therefore, the evaluation of muscle strength in patients with CHF is essential for the prognosis of the disease and the evaluation of interventions. Besides that, strategies to increase muscle strength should be performed to improve this outcome.
Introdução: O exercício físico é um dos principais pilares do programa de reabilitação cardiovascular (RC). Entretanto, devido ao isolamento social adotado pelas autoridades públicas por causa da pandemia da infecção provocada pelo novo coronavírus (COVID-19), a realização de RC em ambiente ambulatorial é impraticável neste momento. Objetivo: Discutir sobre estratégias seguras, eficientes e prazerosas de exercícios físicos para indivíduos com fatores de risco para doença cardiovascular (DCV), clinicamente estáveis, fora do ambiente tradicional de RC. Métodos: Revisão de literatura narrativa com busca das fontes realizadas nas bases de dados Medline via PubMed e Scientific Electronic Library Online (SciElo), sem limite de data, com as palavras-chave: exercício físico, coronavírus, reabilitação cardiovascular e fatores de risco para doença cardiovascular, em português e inglês. Resultados: Foram incluídos 25 artigos e 1 livro no formato eletrônico. Conclusão: O programa de exercício físico provoca melhoras na capacidade funcional, força muscular, perfusão de oxigênio, estado mental e social e a qualidade de vida, minimizando o impacto negativo do isolamento social na saúde. Desta forma, as recomendações sugeridas neste artigo são medidas seguras e que trazem benefícios para indivíduos com fatores de risco para DCV.
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