We conclude that 12 weeks of aerobic exercise training improves cardiac autonomic modulation and functional capacity 4 months after GBS.

Neural control of heart rate, in addition to other clinically valuable measures, is positively altered in moderate-severe COPD patients following 6 weeks of aerobic exercise training. The improvement in submaximal performance after exercise training was associated with parasympathetic activity.

The objective of this study was to (a) evaluate the impact of the leg press, at variable percentages of 1 repetition maximum (1RM), on heart rate variability (HRV) and blood lactate and (b) determine the relationship between HRV with blood lactate in a healthy elderly cohort. Ten healthy men (64 +/- 4 years) participated in a progressive leg-press protocol to maximal exertion. Initially, 1RM for the leg press was determined for all subjects. The protocol then began at 10% of 1RM, with subsequent increases of 10% until 30% of 1RM, followed by incremental adjustments of 5% until exhaustion. The measurement of instantaneous R-R interval variability from Poincare plots (SD1 and SD2) and time domain indexes (RMSSD and RMSM), blood pressure, and blood lactate were obtained at rest and all leg-press loads. Significant alterations of HRV and blood lactate were observed from 30% of 1RM leg press (p < 0.05). Additionally, significant correlations were found between the lactate threshold (LT) and the RMSSD threshold (r = 0.78; p < 0.01), and between the LT and SD1 threshold (r = 0.81, p < 0.01). We conclude that metabolic and cardiovascular alterations are apparent during relatively low resistance exercise (RE) loads in apparently healthy subjects. In addition, HRV indexes were associated with blood-lactate levels during RE. The practical applications is the possibility of using HRV as a noninvasive measure obtained at a relatively low cost may be used to identify neural and metabolic alterations during RE in older subjects.

CONTEXT AND OBJECTIVES: Respiratory muscle strength is relevant to the clinical situation of elderly patients, particularly those presenting with respiratory or cardiac diseases. The objectives of this study were to evaluate the respiratory muscle strength of institutionalized elderly women, compare this with predicted values for the Brazilian population and calculate the correlation with age and anthropometric characteristics. os subgrupos e também com os preditos para a população brasileira. Análise de correlação foi aplicada para a idade, peso, altura e índice de massa corpórea com os valores das pressões respiratórias máximas. O nível de significância adotado foi P < 0,05. RESULTADOS:Não houve diferenças significativas das pressões respiratórias máximas entre os três subgrupos. Em relação aos valores preditos, as pressões respiratórias máximas obtidas foram significativamente menores nos três subgrupos. Correlações negativas entre as pressões respiratórias máximas e a idade e positivas em relação ao peso, altura e índice de massa corpórea foram encontradas. CONCLUSÕES:A força muscular respiratória é marcantemente reduzida em idosas asiladas de 60 a 89 anos, havendo correlação das pressões respiratórias máximas com a idade e com as características antropométricas.NÚMERO DE REGISTRO DE ENSAIO CLÍNICO: ACTRN12608000136303.

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