RESUMO
BACKGROUND: The incremental shuttle test presents some theoretical advantages over the six-minute walk test in chronic heart failure (CHF), including better standardization and less dependency on collaboration. OBJECTIVES: The present study evaluated test-retest repeatability, test accuracy in predicting a peak oxygen consumption (VO(2)) of 14 mL/kg/min or less, as well as the prognostic value of both walking tests in stable CHF patients. METHODS: Sixty-three patients (44 men; New York Heart Association functional class II to IV) underwent an incremental treadmill exercise test and, on another day, the walk test in duplicate. RESULTS: Patients showed well-preserved functional capacity according to the distance walked in both tests (six-minute walk test 491+/-94 m versus incremental shuttle walk test 422+/-119 m; P<0.001). Interestingly, the six-minute and incremental shuttle walk test differences in distance walked were higher in more disabled patients. The mean bias +/-95% CI of the within-test differences were similar (7+/-40 m and 8+/-45 m, respectively). Peak VO(2), but not distance walked in either test, was associated with survival (P<0.05). CONCLUSIONS: The incremental shuttle walk test showed similar repeatability and accuracy in estimating peak VO(2) compared with the six-minute walk test in CHF patients. Direct measurement of peak VO(2), however, remains superior to either walking test in predicting survival--at least in patients with well-preserved functional capacity.
Assuntos
Teste de Esforço/métodos , Insuficiência Cardíaca/fisiopatologia , Consumo de Oxigênio/fisiologia , Doença Crônica , Tolerância ao Exercício/fisiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Curva ROC , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Análise de Sobrevida , CaminhadaRESUMO
OBJECTIVE: To determine if supervised cardiovascular training improves exercise tolerance, aerobic capacity, depression, functional capacity, and quality of life in patients with systemic lupus erythematosus (SLE). METHODS: Sixty women with SLE (ages 18-55 years) were evaluated using Short Form 36, visual analog scale for pain, scale for fatigue, Beck Depression Inventory, and Health Assessment Questionnaire (HAQ), and participated in a training protocol of incremental load on a treadmill with computed gas metabolic analysis. Maximum oxygen consumption (VO(2max)) and anaerobic threshold VO(2) were calculated with a SensorMedics Vmax29C analyzer (Sensor Medics, Yorba Linda, CA), and heart rate was measured by electrocardiogram. Patients were divided into 2 groups: a training group (41 patients) that participated in the supervised cardiovascular training program and a control group (19 patients) that did not participate in the program. All variables were analyzed at baseline and after 12 weeks for both groups. The training program occurred in the morning for 60 minutes, 3 times a week for 12 weeks. Statistical analysis included Wilcoxon's rank sum test, Mann-Whitney U test, chi-square test, and Fisher's exact test. P values <0.05 were considered to be statistically significant. RESULTS: The 2 groups were homogeneous and comparable at baseline. The training group showed a significant improvement of aerobic capacity measured by anaerobic threshold VO(2) (14.67 +/- 3.03 versus 17.08 +/- 3.35 ml/kg/minute, P < 0.001). Comparison of the training group and control group after 12 weeks showed a significant difference relating to VO(2max) (24.31 +/- 4.61 versus 21.21 +/- 3.88 ml/kg/minute, P = 0.01) and anaerobic threshold VO(2) (17.08 +/- 3.35 versus 13.66 +/- 2.82 ml/kg/minute, P < 0.0001). After cardiovascular training, we found a significant improvement of Beck inventory score (8.37 +/- 12.79 versus 2.90 +/- 3.00, P < 0.001) and HAQ score (0.14 +/- 0.21 versus 0.06 +/- 0.19, P < 0.01) in the training group. CONCLUSION: This study showed significant improvement in exercise tolerance, aerobic capacity, quality of life, and depression after a supervised cardiovascular training program in patients with SLE.
Assuntos
Limiar Anaeróbio , Terapia por Exercício , Tolerância ao Exercício , Lúpus Eritematoso Sistêmico/terapia , Qualidade de Vida , Adolescente , Adulto , Exercício Físico , Teste de Esforço , Feminino , Humanos , Estudos Longitudinais , Lúpus Eritematoso Sistêmico/psicologia , Pessoa de Meia-Idade , Medição da Dor , Método Simples-Cego , Inquéritos e QuestionáriosRESUMO
[1]Carvalho Jr., E.,Santos, A.L.G., Schneider A.P., Beretta, L., Tebexreni, A.S., Cesar, M.C., Barros, T.L.Análise comparativa da aptidäo cardiorrespiratória de triatletas avaliados em ciclossimulador e bicicleta ergométrica. Rev. Bras. Ciên. e Mov. 8 (3):21-24,2000. bjetivo: comparar a aptidäo cardiorrespiratória de triatletas, avaliados por testes em bicicleta ergométrica e ciclossimulador (ergômetro mais específico).Métodos: 9 triatletas treinados, 6 do sexo masculino e 3 do sexo feminino, foram submetidos a testes ergoespirométricos em 2 diferentes cicloergômetros, um ciclossimulador e uma bicicleta ergométrica, sendo determinados o consumo máximo de oxigênio (VO2 max), o limiar anaeróbico ventilatório (LA), a freqüência cardíaca máxima (FCmax) e a freqüência cardíaca do limiar anaeróbio (FC LA). Resultados: näo foram encontradas diferenças significantes entre os testes para nenhuma das variáveis determinadas. Os valores dos testes em ciclossimulador e bicicleta ergométrica foram, respectivamente-. VO2 max 62,88 ñ 5,13 vs 62,13 ñ 6,00 ml/kg/min,LA 37,84 ñ 3,75 vs 38,96 ñ 4,92 ml/kg/min, FC max 182,00 ñ 8,72 vs 180,89 ñ 11,16 bpm e FC LA 148,22 ñ6,22 vs 147,89 ñ 8,54 bpm. Conclusäo: os resultados sugerem que a bicicleta ergométrica pode ser utilizada para avaliaçäo física cardiorrespiratória de triatletas com a mesma precisäo do ciclossimulador.