2.8. Nordic Walking Training
The NW training programme lasted for 6 weeks parallel to standard rehabilitation. The patients performed 2 sessions a week, which did not coincide with the sessions of cardiac rehabilitation on a cycle ergometer. The activity was undertaken individually by patients after prior instruction on the NW technique. Patients were provided with the Polar M200 wrist heart rate monitor. The intensity of the training was determined by the heart rate level based on the calculation of the training heart rate in the interval exercise. The patients’ task was to perform a 30 min NW march, causing the heart rate to increase to the designated level. The components of the training session were a warm-up, the main part—walking, and a cool-down phase. The total exercise duration was approximately 60 min [