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Table 5 Comparison of VT between Japanese with and without exercise habits classified by age group

From: Evaluation of ventilatory threshold and its relation to exercise habits among Japanese

Age

Men

Women

Exercise habits (+)

Exercise habits (−)

P

Exercise habits (+)

Exercise habits (−)

P

Oxygen uptake at VT (ml/kg/min)

 20–29

18.0 ± 5.7

14.7 ± 3.7

0.0020*

15.4 ± 4.3

12.9 ± 2.7

0.0049*

 30–39

17.9 ± 5.3

13.7 ± 2.4

<0.0001*

17.4 ± 5.4

12.7 ± 1.9

<0.0001*

 40–49

16.0 ± 4.4

14.0 ± 2.0

0.0001*

13.0 ± 2.4

12.1 ± 1.9

0.0403*

 50–59

14.6 ± 3.1

13.7 ± 2.1

0.0759

12.4 ± 2.1

11.7 ± 1.8

0.0548

 60–69

13.5 ± 1.9

12.0 ± 1.0

0.0171*

12.2 ± 1.9

11.3 ± 1.5

0.0520

Work rate at VT (W)

 20–29

104.0 ± 33.7

87.1 ± 19.2

0.0041*

74.0 ± 24.2

57.6 ± 12.4

0.0003*

 30–39

99.5 ± 25.8

80.5 ± 17.2

<0.0001*

74.2 ± 26.5

56.4 ± 11.2

<0.0001*

 40–49

86.4 ± 26.1

75.9 ± 17.8

0.0024*

57.4 ± 12.4

49.0 ± 10.8

0.0003*

 50–59

75.4 ± 18.5

71.9 ± 17.0

0.3074

50.5 ± 10.0

45.7 ± 11.6

0.0177*

 60–69

60.9 ± 15.3

59.0 ± 9.0

0.7067

41.4 ± 8.8

38.0 ± 8.7

0.1522

Heart rate at VT (beat/min)

 20–29

113.8 ± 12.8

115.7 ± 11.1

0.4803

111.7 ± 12.5

114.7 ± 11.2

0.3743

 30–39

108.3 ± 10.0

107.7 ± 10.2

0.7349

110.4 ± 14.4

109.9 ± 11.0

0.8711

 40–49

105.5 ± 13.1

105.6 ± 10

0.9429

105.3 ± 10.4

108.1 ± 10.4

0.2048

 50–59

96.7 ± 10.7

101.3 ± 10.3

0.0262*

103.2 ± 10.6

103.5 ± 11.5

0.8475

 60–69

97.3 ± 10.0

99.8 ± 10.8

0.5338

100.2 ± 12.5

97.3 ± 12.6

0.3916

  1. Values are given as the mean ± SD
  2. * Significant at P < 0.05