Influence of Hydration and Functional Aerobic Capacity on the Nonlinear Dynamics of Heart Rate in Healthy Individuals

Comparador activo: Control protocol

The control protocol will consist of an initial 10 minutes of rest, followed by 90 minutes of aerobic activity and 60 minutes of the final recovery. Hydration will not be allowed throughout the protocol

Otro: aerobic activity

aerobic activity

Experimental: Hydration protocol

The control protocol will consist of an initial 10 minutes of rest, followed by 90 minutes of aerobic activity and 60 minutes of the final recovery. In this protocol, volunteers will be hydrated with mineral water from the 15th minute of exercise until the end of recovery

Otro: aerobic activity

aerobic activity

Otro: water

hydration with mineral water in 10 equal portions, administered at regular intervals from the 15th minute of exercise until the end of the recovery period.

Blood Pressure

Will occur indirectly, using a stethoscope and an aneroid sphygmomanometer in the left arm. The indicated values will be registered in an individual form. To avoid errors in the determination of blood pressures in volunteers, a single evaluator will measure these variables throughout the experimental procedure. Data will be collected at the end of the 10 minutes of initial rest and at minutes 30, 60 and 90 during exercise on the treadmill, as well as will be collected at minutes 1, 5, 10, 20, 30, 40, 50 and 60 of recovery.

Heart Rate

The heart rate will be captured beat by beat using the Polar RS800CX frequency meter, equipment previously validated to capture this parameter. Data will be collected at the end of the 10 minutes of initial rest and at minutes 30, 60 and 90 during exercise on the treadmill, as well as will be collected at minutes 1, 5, 10, 20, 30, 40, 50 and 60 of recovery.

Autonomic Modulation - SD1 index

the data for this evaluation will be collected using a heart rate monitor that registers the heart rate beat by beat and provides information regarding the RR intervals. The SD1 index corresponds to the dispersion of points perpendicular to the line of identity of the ellipse obtained from the Poincaré plot. Expressed in milliseconds.

Autonomic Modulation - SD2 index

The data for this evaluation will be collected using a heart rate monitor that registers the heart rate beat by beat and provides information regarding the RR intervals. The SD2 index corresponds to the dispersion of points along the line of identity of the ellipse obtained from the Poincaré plot. Expressed in milliseconds.