Table 1.
Individual Study Characteristics
| Author | Year | Sample Size | Participants’ Age | Stress Test Protocol | Analysis Window (min average) | Recording Method | HRV MEASURE | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Men | Women | Mean | Standard Deviation | Preparation (min) | Test (min) | Recovery | Baseline | Preparation | Test | Recovery | ||||
| Baert | 2012 | 3 | 11 | 26.7 | 6.6 | 3 | NR | 30 | 20 | NR | NR | 20 | Polar S810i cardiac monitor | RMSSD |
| Brugnera | 2018 | 29 | 31 | 25.6 | 3.8 | 2 | 5 | NR | 5 | 2 | 5 | NR | Portable Device (Pulse) | RMSSD |
| Buchanan | 2010 | 27 | 27 | 50.2 | 10.7 | 10 | 10 | NR | 5 | 10 | 10 | NR | ECG | HF |
| Clamor | 2018 | 27 | 32 | 29.9 | 11.8 | 3 | 10 | 10 | 5 | 5 | 5 | 5 | ECG | RMSSD |
| Dijkhuis | 2019 | 19 | 7 | 20.6 | 1.5 | 7 | 6 | NR | 5 | 5 | 5 | 5 | ECG | RMSSD |
| Espin | 2019 | 25 | 51 | 19.1 | 1.6 | 10 | 10 | 20 | 5 | 5 | 5 | 5 | Portable Device (Suunto, model6) | RMSSD |
| Gamaiunova | 2019 | 12 | 10 | 47.6 | 10.5 | 10 | 10 | 30 | 2 | 2 | 2 | 2 | Portable Device (Polar RS800CX cardiac monitor) | RMSSD |
| Grimley | 2018 | 10 | 20 | 19.8 | 1.4 | NR | 10 | NR | 4 | 5 | 5 | 5 | Wrist-worn pulse oximeter (WristOx2) | HF |
| Jonsson | 2015 | 9 | 7 | 49.2 | 6.4 | 5 | 10 | 40 | 5 | 5 | 5 | 5 | ECG | RSA |
| Klumbies | 2014 | 38 | 30 | 30.2 | 10.0 | 5 | 10 | 60 | 2 | 2 | 2 | 2 | Polar S810i cardiac monitor | RMSSD |
| Maattanen | 2018 | 4 | 42 | 28.1 | 10.0 | 3 | 3 | 8 | NR | NR | NR | NR | ECG | HF |
| Moretta | 2018 | 4 | 17 | 23.3 | 2.9 | 3 | 5 | 3 | 3 | 3 | 3 | 3 | ECG | RMSSD |
| Pulopulos | 2018 | 85 | 74 | 30.0 | 11.1 | 5 | 10 | 15 | 5 | 5 | 5 | 5 | ECG | RMSSD |
| Schwarz | 2018 | 25 | 27 | 42.1 | 40.5 | 5 | 10 | 60 | 2 | 2 | 2 | 2 | Polar 800CX | RMSSD |
| Strahler | 2010 | 72 | 55 | 41.5 | 18.0 | 3 | 10 | 20 | 2 | 2 | 2 | 2 | Portable Device (Polar S810i cardiac monitor) | RMSSD |
| Van Hedger | 2017 | 25 | 16 | 20.0 | 1.3 | 2 | 3 | 5 | 5 | 2 | 3 | 5 | ECG | RSA |
| Wearne | 2019 | 26 | 32 | 22.2 | 6.4 | 10 | 10 | 20 | 5 | 5 | 5 | 5 | ECG | HF |