2.4. Data Collection Measurements
Before and immediately after each intervention, HRV was evaluated. Patients were recorded for a short period of 5 min in a resting state using a Polar H7 heart belt (Polar Electro, Kempele, Finland) [R-R intervals were subsequently evaluated using Kubios HRV Premium 3.4.1 desktop software (Kubios OY, Kuopio, Finland) to calculate all the HRV parameters considered in this study (see 