| AerT | aerobic threshold |
| ANS | autonomic nervous system |
| AnT | anaerobic threshold |
| BLa | blood lactate production |
| CPET | Cardiopulmonary exercise test |
| DFA | detrended fluctuation analysis |
| ECG | electrocardiography |
| HR | Heart Rate |
| HRV | Heart Rate Variability |
| PS | parasympathetic activity |
| RQA | Recurrence Quantification Analysis |
| RQA | Recurrence Quantification analysis Epoch-by-epoch |
| RPM | revolution per minute |
| S | sympathetic activity |
| VO2max | maximal oxygen uptake |
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