Cardiac autonomic modulation in healthy elderly after different intensities of dynamic exercise

Figures & data

Table 1 Population study characteristics

	Elderly subjects (n=10)
Age, years	66±2
Males/females	3/7
Height, cm	158±1
Weight, kg	58.4±4.4
Body mass index, kg/m^2	23.4±0.9
Heart rate, bpm	69.4±2.9
Systolic blood pressure, mmHg	120.4±2.5
Diastolic blood pressure, mmHg	71.8±1.9
Cholesterol, mg/dL	220.1±7.0
LDL cholesterol mg/dL	146.7±9.3
HDL cholesterol, mg/dL	52.6±3.7
Triglycerides, mg/dL	150.6±24.0
Glucose, mg/dL	89.2±3.7
T3, ng/dL	112.7±5.6
T4, μg/dL	5.9±1.6
Hemoglobin, g/dL	13.3±0.4

Note: Values are presented as the mean ± standard error.

Abbreviations: n, number; LDL, low-density lipoprotein; HDL, high-density lipoprotein; T3, triiodothyronine; T4, thyroxine.

Figure 1 HR responses at mild (P_EX40%) and moderate (P_EX60%) dynamic exercise in elderly subjects (n=10).

Notes: *P<0.001 P_EX40% versus P_EX60%. Values are presented as the mean ± standard error.

Abbreviations: HR, heart rate; P_EX, postexercise; n, number.

Figure 2 R-R intervals, R-R variance, normalized LF spectral component, normalized HF spectral component, and LF-to-HF ratio of the R-R interval in elderly subjects (n=10).

Notes: (A) R-R intervals; (B) R-R variance; (C) normalized LF spectral component (LF nu); (D) normalized HF spectral component (HF nu); and (E) LF-to-HF ratio of the R-R interval (LF/HF). The R-R intervals, R-R variance, and HF nu were significantly reduced in P_EX40% and P_EX60% when compared to the baseline condition. In addition, the parameters in the P_EX60% condition were significantly lower than those in the P_EX40% condition. *P<0.001 versus the baseline condition. ^†P<0.001 versus P_EX40%. Values are presented as the mean ± standard error.
Abbreviations: P_EX, postexercise; LF, low frequency; HF, high frequency; n, number; nu, normalized units.