Table 1.
Characteristics of the studies.
| Characteristics of the Samples | ||||||
| Author | N | Age (Years) | Sex (Males) | BMI (kg/m2) | SD | PEDro Score |
| Chen S. R. et al., 2016 [5] | 50 | ±12 | 28 | Control: 27.9 ± 2.71 | RCT | 05/10 |
| Experimental: 26.79 ± 3.34 | ||||||
| Farah B. Q. et al., 2014 [3] | 43 | 13–18 | 14 | Controls: HIT = 33.5 ± 1.4; LIT = 34.5 ± 1.3 | RCT | 05/10 |
| Experimental: HIT = 32 ± 1.8; LIT = 33.9 ± 1.7 | ||||||
| Farinatti P. et al., 2016 [17] | 44 | 13–17 | 20 | Control: 20.6 ± 2.4 | CT | 04/10 |
| Experimental: 32.1 ± 3.6 | ||||||
| Gutin B. et al., 1997 [41] | 35 | 7–11 | 12 | Control: 28.8 ± 1.6 | RCT | 05/10 |
| Experimental: 31.4 ± 1.8 | ||||||
| Gutin B. et al., 2000 [42] | 79 | ±10 | 26 | - | RCT | 03/10 |
| Hamila A. et al., 2018 [6] | 31 | ±14 | 12 | - | RCT | 04/10 |
| Huang J. et al., 2019 [21] | 21 | 5–16 | 11 | Control: 30.4 ± 3.7 | CT | 04/10 |
| Experimental: 26.4 ± 3.1 | ||||||
| Paschoal M. A. et al., 2018 [43] | 15 | 9–12 | - | Baseline: 23.20 ± 1.3 | CT | 03/10 |
| Ricci-Vitor A. L. et al., 2016 [44] | 15 | 10.93 ± 2.28 | 7 | Control: 28.95 ± 8.32 | CT | 04/10 |
| Experimental: 28.15 ± 8.37 | ||||||
| Vasconcellos F. et al., 2015 [46] | 35 | ±14 | 26 | - | RCT | 05/10 |
| Vasconcellos F. et al., 2016 [45] | 30 | 12–2017 | 20 | Control: 32.2 ± 4.9 | RCT | 05/10 |
| Experimental: 31.1 ± 5.2 | ||||||
| Methods of Included Studies | ||||||
| Author | Intervention Time | Exercise Type | Control Group | Graduation Method of Exercise Intensity | Main Instrument of HRV | |
| Chen S. R. et al., 2016 [5] | 12 wk | Aerobic | No exercise | % HR max | CheckMyHeart 3.0, DailyCareBioMedical, Inc., Taoyuan, Taiwan | |
| Farah B. Q. et al., 2014 [3] | 24 wk | Aerobic | - | Metabolic equivalent of task (MET) and VO2Max | Polar model RS800CX, Polar Electro Inc., Lake Success, New York, NY, USA | |
| Farinatti P. et al., 2016 [17] | 30–40 min/3 d/12 wk | Resistance training | Normal weight | % Maximum Repetition | Finometer, Finapres Medical Systems, Amsterdam, The Netherlands | |
| Gutin B. et al., 1997 [41] | 40 min/5 d/16 wk | Aerobic | No exercise | % HR Submax | Polar Vantage, Port Washington, New York, NY, USA | |
| Gutin B. et al., 2000 [42] | 40 min/5 d/16 wk | Aerobic | - | HR | Polar Vantage, Port Washington, New York, NY, USA | |
| Hamila A. et al., 2018 [8] | 60 min/3 d/8 wk | Aerobic | No exercise | Maximal aerobic speed | Polar RS810, Kempele, Finland | |
| Huang J. et al., 2019 [21] | 5 h/6 d/6 wk | Aerobic | - | % HR max | Sphygmo Corsystem, AtCor Medical, Sydney, Australia | |
| Paschoal M. A. et al., 2018 [40] | 12 sessions/40 min | Aerobic | - | % HR Submax | Polar S810®, Kempele, Finland | |
| Ricci-Vitor A. L. et al., 2016 [44] | 60 min/3 d/12 wk | Aerobic | - | Not graduated | Polar Electro, model S810i, Kempele, Finland | |
| Vasconcellos F. et al., 2015 [46] | 60 min/3 d/12 wk | Sport | No exercise/Normal weight | HRV | Polar RS800cx, PolarTM, Kempele, Finland | |
| Vasconcellos F. et al., 2016 [45] | 60 min/3 d/12 wk | Sport | No exercise/Normal weight | Not graduated | Polar RS800cx, PolarTM, Kempele, Finland | |
Legend—SD: Study Design; RCT: randomized controlled trial; CT: Clinical Trial; wk: weeks; min: minutes; d: days; BMI: Body Mass Index; HIT: High-Intensity Interval Training; LIT: Low-Impact Interval Training.