Heart rate variability (HRV) is impaired in patients after myocardial infarction. Most studies so far have proved chronic beneficial effects of different types of exercise on HRV parameters. Data on acute effects of different types of exercise training (e.g. high intensity interval training \[HIIT\] and moderate intensity continuous training \[MICT\]) is scarce. Patients in the study will perform both HIIT and MICT in a random order and in-between break of at least 48 hours. A 5-minute high resolution ECG recording will be performed before and immediately after both HIIT and MICT.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
20
The high-intensity interval training session consists of 5-min warm-up and 5-min cool-down periods. The main part has 7 cycles. Each cycle consists of 1.5 min of 80-90% of HRpeak and 3 min of 65-70% of HRpeak. The moderate-intensity continuous training session consists of 5 min warm-up and 3-min cool down period. The main part consists of 32 min of 75% of HRpeak.
University Medical Centre Ljubljana
Ljubljana, Slovenia
RECRUITINGHF parameter
High frequency domain of the HRV
Time frame: 5-minutes high resolution ECG recording before and after an exercise session
LF parameter
Low frequency domain of the HRV
Time frame: 5-minutes high resolution ECG recording before and after an exercise session
SDNN
Standard deviation of NN intervals
Time frame: 5-minutes high resolution ECG recording before and after an exercise session
RMSSD
Root mean square of successive RR interval differences
Time frame: 5-minutes high resolution ECG recording before and after an exercise session
pNN50
Percentage of successive RR intervals that differ by more than 50 ms
Time frame: 5-minutes high resolution ECG recording before and after an exercise session
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