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. 2023 Oct 9;120(9):e20230086.
doi: 10.36660/abc.20230086. eCollection 2023.

Aerobic Exercise Prescription in Cardiac Rehabilitation Based on Heart Rate from Talk Test Stages and 6-Minute Walk Test

[Article in English, Portuguese]
Amanda Althoff  1   2 , Ariany Marques Vieira  2   3 , Lucas Santos da Silveira  1   2 , Magnus Benetti  4 , Marlus Karsten  1   2
Affiliations

Aerobic Exercise Prescription in Cardiac Rehabilitation Based on Heart Rate from Talk Test Stages and 6-Minute Walk Test

[Article in English, Portuguese]
Amanda Althoff et al. Arq Bras Cardiol. .

Abstract
in English, Portuguese

Background: Although the Talk Test (TT) is a reliable and low-cost test, its use for aerobic exercise prescription is still limited.

Objective: To analyze the heart rate (HR) in the stages of the TT and at the peak of the 6-minute walk test (6MWT) as a parameter to prescribe aerobic exercise compared with HR at the first and second ventilatory thresholds (VT1 and VT2) of cardiopulmonary exercise test (CPET).

Methods: Individuals with cardiovascular disease attended three assessment days: 1) anamnesis and CPET; 2) 6MWT; and 3) TT. One-way repeated measures ANOVA or Friedman's test were used to compare HR at VT1 and VT2 with HR at TT stages: last positive (TT+), first equivocal (TT±), and negative (TT-), and at the peak of the 6MWT. Pearson's or Spearman's test assessed correlations between HR at VTs, TT stages, and 6MWT. Statistical significance was set at 5%.

Results: The study included 22 cardiac patients (13 men, 61 ± 8 years). HR at VT1 was similar to HR at TT+ (p = 0.987) and TT± (p = 0.154), and moderately correlated with TT+ (r = 0.479, p = 0.024). HR at VT2 was similar to TT- (p = 0.383), with a strong correlation (r = 0.757, p < 0.001). HR at the peak of the 6MWT was significantly different from HR at TT+, TT±, and VT1 (p = 0.001, p = 0.005, and p < 0.001, respectively) but similar to TT- (p = 0.68).

Conclusions: HR at TT+ and TT- reflect HR at VT1 and VT2, respectively, differently from 6MWT, which was similar only to VT2. TT may be an objective test to assist aerobic exercise prescription in cardiac rehabilitation.

Fundamento: Embora o Teste da Fala (TF) seja um teste confiável e de baixo custo, seu uso para prescrição de exercício aeróbio ainda é limitado.

Objetivo: Analisar a frequência cardíaca (FC) dos estágios do TF e no pico do teste de caminhada de 6 minutos (TC6min) como parâmetro para a prescrição de exercício aeróbio comparando com a FC no primeiro e segundo limiares ventilatórios (LV1 e LV2) do teste cardiopulmonar de exercício (TCPE).

Métodos: Pacientes com doença cardiovascular compareceram a 3 dias de avaliação: 1) anamnese e TCPE; 2) TC6min; e 3) TF. Foram usados ANOVA unidirecional de medidas repetidas ou teste de Friedman para comparar a FC no LV1 e LV2 com a FC nos estágios do TF: último positivo (TF+), primeiro equívoco (TF±) e negativo (TF−) e no pico do TC6min. O teste de Pearson ou Spearman avaliou se há correlação entre FC em LVs, estágios do TF e TC6min. A significância estatística foi fixada em 5%.

Resultados: O estudo incluiu 22 pacientes cardíacos (13 homens, 61 ± 8 anos). A FC no LV1 foi semelhante à FC no TF+ (p = 0,987) e TF± (p = 0,154), e moderadamente correlacionada com o TF+ (r = 0,479, p = 0,024). A FC no LV2 foi semelhante ao TF− (p = 0,383), com forte correlação (r = 0,757, p < 0,001). A FC no pico do TC6min foi significativamente diferente da FC no TF+, TF± e LV1 (p = 0,001, p = 0,005 e p < 0,001, respectivamente), mas semelhante ao TF− (p = 0,68).

Conclusões: A FC no TF+ e TF− reflete a FC no LV1 e LV2, respectivamente, diferentemente do TC6min, que foi semelhante apenas ao LV2. O TF pode ser um teste objetivo para auxiliar a prescrição de exercício aeróbio na reabilitação cardíaca.

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Conflict of interest statement

Potencial conflito de interesse

Não há conflito com o presente artigo.

Figures

None
: Prescrição de Exercício Aeróbio na Reabilitação Cardíaca Baseada na Frequência Cardíaca dos Estágios do Teste da Fala e do Teste de Caminhada de 6 Minutos
Figura 1
Figura 1. – A: Comparação da FC entre LV1, estágiosTF+ e TF± e TC6min. B: Comparação da FC entre LV2, TF- e TC6min. Fonte: elaborada pelos autores. Nota: devido à distribuição não normal e normal, foi usado o teste de Friedman para as variáveis da Figura 1A e ANOVA de medidas repetidas para as variáveis da Figura 1B, respectivamente.
None
: Aerobic Exercise Prescription in Cardiac Rehabilitation Based on Heart Rate from Talk Test Stages and 6-Minute Walk Test
Figure 1
Figure 1. – A: Comparison of HR between VT1, stages TT+ and TT±, and 6MWT. B: Comparison of HR between VT2, TT– and 6MWT. Source: elaborated by the authors. Note: Due to non-normal and normal distribution, Friedman’s test was used for Figure 1A variables, and repeated measures ANOVA was used for Figure 1B variables, respectively.
See this image and copyright information in PMC

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