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Table 2 Characteristics of the studies included and TESTEX and STARDHRV score

From: Effects of different exercise interventions on heart rate variability and cardiovascular health factors in older adults: a systematic review

Author, year

Participants (sample size, age [year], gender)

HRV protocol (method, respiration, position, sampling frequency)

Analysis length

Intervention (type, duration, sessions/week)

Control group

TESTEX

STARDHRV

Endurance training

 Albinet et al., 2016 [56]

32

Polar RS800 chest belt

256 NN intervals

Endurance (aquaerobics & swimming)

yes (stretching)

10.5

19.5

Age: 67 ± 5

n.r.

 

21 weeks

26 women, 6 men

sitting

n.r.

 

2 sessions

 Albinet et al., 2010 [5]

24

Polar RS800 chest belt

256 NN intervals

Endurance (walking, circuit-training, stepping & running)

yes (stretching)

11

21

Age: 70.7 ± 4.2

n.r.

 

12 weeks

13 women, 9 men

sitting

n.r.

 

3 sessions

 Okazaki et al., 2005 [57]

10

ECG

6 min in each breathing mode

Endurance (walking, running, swimming & cycling)

no

4.5

20.5

Age: 71.3 ± 3.0

spontaneous & paced (12 breaths/min)

 

12 months

 

4 women, 6 men

supine

1.000 Hz

 

3 sessions

   

 Wanderley et al., 2013 [22]e

50

PolarNV vantage chest belt

5 min

Endurance (walking, stepping, dancing)

yes

10

18.5

Age: 68.6 ± 5.7

spontaneous

 

8 months

39 women, 11 men

supine

n.r.

 

3 sessions

Resistance training

 Gerage et al., 2013 [58]

29

Polar s810i chest belt

5 min

Resistance

yes (stretching)

12.5

22.5

Age: 65.9 ± 4.6

spontaneous

 

12 weeks

100% women

Sitting

n.r.

 

3 session

 Kanegusuku et al., 2015 [18]

25

ECG

5 min

High-intensity progressive resistance training

yes

9.5

23

Age: 63.5

n.r.

 

16 weeks

18 women, 7 men

sitting

500 Hz

 

2 sessions

 Wanderley et al., 2013 [22]

50

PolarNV vantage chest belt

5 min

Whole-body resistance

yes

10

18.5

Age: 68.6 ± 5.7

spontaneous

 

8 months

39 women, 11 men

supine

n.r.

 

3 sessions

Coordinative training

 Audette et al., 2006 [21]

19

ECG

5 min

Coordinative (Tai Chi)

yes

8.5

18.5

Age: 72.3

spontaneous

 

12 weeks

100% women

n.r.

n.r.

 

3 sessions

 Varas-Diaz et al., 2020 [20]

20

Polar RS800CX chest belt

5 min

Coordinative (dancing)

yes

10.5

19.5

Age: 68.6 ± 5.7

n.r.

 

6 weeks

7 women, 13 men

supine

1.000 Hz

 

5 (week 1–2), 3 (week 3–4) & 2 sessions (week 5–6)

Multimodal training

 Eggenberger et al., 2020 [59]

70

Polar RS800CX chest belt

5 min

Multimodal (DG: dancing, resistance & balance; MG: treadmill walking, memory training, resistance & balance; TG: treadmill walking, resistance & balance)

no

7

21

Age: 78.8

n.r.

 

26 weeks

45 women, 25 men

sitting

1.000 Hz

 

2 sessions

 McKune et al., 2017 [46]

58

Suunto t6 chest belt

300 NN intervals

Multimodal (endurance, resistance & balance)

no

7

18.5

Age: 71.8

n.r.

 

12 weeks

44 women, 14 men

sitting

n.r.

 

2 or 3 sessions

 Rezende Barbosa et al., 2019 [60]

39

Polar RS 800 chest belt

1.000 NN intervals

Multimodal (resistance, coordination, balance, agility & walking)

yes

9.5

20

Age: 59.2

n.r.

 

18 weeks

100% women

supine

n.r.

 

3 sessions

 Rossi et al., 2013 [61]

17

Polar s810i chest belt

256 NN intervals

Multimodal (endurance & resistance)

yes

4.5

18

Age: 60.8 ± 6.2

spontaneous

 

16 weeks

100% women

supine

n.r.

 

3 sessions

 Verheyden et al., 2006 [62]

29

ECG

10 min

Multimodal (endurance & resistance)

yes

10.5

19,5

Age: 63.3

spontaneous

 

12 months

100% men

standing & supine

1.000 Hz

 

2–3 sessions

  1. BF, body fat; BM, body mass; BMI, body mass index; BP, blood pressure; BR, baroreflex sensitivity; CO, cardiac output; DG, dancing group; ECG, electrocardiography; HF (nu), power in high frequency range (in normalized units); HF%, relative power in high frequency range; LF (nu), power in low frequency range (in normalized units); LF%, relative power in low frequency range; ln, natural logarithm; MG, memory training group; mRR, mean RR interval; n.r., not reported; pNN50, number of pairs of adjacent NN intervals differing by more than 50 ms in the entire recording divided by the total number of all NN intervals; RHR, resting heart rate; RMSSD, square root of the mean of the sum of the squares of differences between adjacent NN intervals; SD1, standard deviation of instantaneous beat-to-beat variability, extracted from Poincaré Plot; SD2, standard deviation of the long-term variability, extracted from Poincaré Plot; SDNN, standard deviation of NN intervals; SV, stroke volume; TG, treadmill walking group; TP, total power; TPR, total peripheral resistance; TV, total variance; VO2 max, maximum oxygen consumption; VO2 peak, peak oxygen consumption; 6-MWT, six minute walking test