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Table 2 Between-group difference in cardiorespiratory responses to maximal exercise at baseline and post-program

From: Effect of high-intensity interval training on cardiorespiratory fitness, physical activity and body composition in people with schizophrenia: a randomized controlled trial

  

Intervention group

Comparison group

 

N

Mean (SD)

N

Mean (SD)

Mean diff

95% CI

P

VO2max (L·min− 1)

Baseline

34

2.7 (0.7)

27

2.5 (0.9)

0.05

0.2, −0.3

0.7

Post-program

20

2.7 (0.9)

26

2.6 (0.9)

0.1

0.3, − 0.1

0.3

VO2max (mL∙kg−1∙min−1)

Baseline

34

32.1 (11)

27

31.1 (11)

0.9

3.6, −5.5

0.7

Post-program

21

30.8 (11)

26

31.1 (11)

−1.8

−4.4, 0.8

0.17

VO2max (mL∙kgFFM−1∙min− 1)

Baseline

34

44.8 (12)

27

42.6 (12)

0.2

5.5, −4.9

0.9

Post-program

20

43.4 (12)

26

43.2 (12)

1.7

5.6, −2.1

0.3

RER (VCO2/VO2)

Baseline

34

1.09 (0.05)

27

1.09 (0.06)

0.00

0.02, −0.04

0.5

Post-program

21

1.10 (0.07)

26

1.08 (0.06)

0.01

0.05, −0.02

0.3

Maximal heart rate (beats·min− 1)

Baseline

34

174 (22)

27

170 (17)

0.4

8, −7

0.9

Post-program

20

173 (20)

26

169 (13)

1.8

5.4, −1.7

0.3

Ventilation (L∙min− 1)

Baseline

29

94 (29)

22

84 (30)

2.0

−16, 12

0.7

Post-program

21

88 (27)

24

85 (25)

3.8

−13, 5

0.4

Oxygen pulse (mL∙beats− 1)

Baseline

34

15.5 (3.9)

27

14.5 (4.7)

0.4

2.3, −1.3

0.5

Post-program

19

16.0 (4.3)

25

15.2 (5.1)

0.6

2.0, −0.7

0.3

Resting heart rate (beats∙min− 1)

Baseline

34

75 (12)

27

75 (16)

0.9

8, −6

0.7

Post-program

21

75 (13)

24

72 (14)

0.4

7, −6

0.8

Heart rate reserve (beats∙min−1)

Baseline

34

98 (25)

27

94 (26)

0.5

10, −11

0.9

Post-program

19

97 (21)

23

97 (23)

1.2

8.8, −6.4

0.7

  1. Presented values are the mean ± SD. VO2max, peak oxygen uptake. FFM, fat-free mass. RER, respiratory exchange ratio. CI, confidence interval