Table 2 Self-reported physical activity for overall and sub-samples (mean ± standard deviation)

Physical Activity (days/week)^a

4.17 ± 2.24

4.80 ± 2.27

−22.94

< 0.0001

 0 days/week

10.0%

11.1%

 1–2 days/week

13.3%

4.7%

 3–4 days/week

27.9%

19.5%

5–7 days/week

48.8%

64.7%

Sitting Time (hours/day)^b

2.02 ± 1.48

1.16 ± 1.38

48.92

< 0.0001

Week 1

Week 8

t

p

Miles/week

26.66 ± 20.69

31.54 ± 26.59

−24.62

< 0.0001

 Women

25.68 ± 19.49

30.51 ± 25.13

−22.45

< 0.0001

 Men

29.88 ± 23.98

34.97 ± 30.68

−10.73

< 0.0001

 18–29 years of age

26.85 ± 21.67

31.78 ± 27.81

−9.38

< 0.0001

 30–49 years of age

27.44 ± 20.52

32.45 ± 26.51

−16.80

< 0.0001

 50–64 years of age

26.93 ± 20.32

31.86 ± 26.43

−13.52

< 0.0001

  ≥ 65 years of age

21.20 ± 20.47

25.20 ± 26.60

−7.54

< 0.0001

 Anglo

26.99 ± 20.81

31.62 ± 26.54

−19.70

< 0.0001

 Hispanic

27.73 ± 22.41

32.31 ± 27.90

−8.84

< 0.0001

 African American

23.15 ± 16.47

30.12 ± 24.05*

−10.72

< 0.0001

 Other

24.79 ± 19.25

30.58 ± 27.09

−6.60

< 0.0001