Table 5

Association of substituting 30 min of sedentary behaviour for LPA, MVPA or sleep time with measures of WC, BMI, BP, pulse, glucose, triglycerides, HDL, LDL and total cholesterol using isotemporal substitution on non-workdays in a sample of lorry drivers from East Midlands, UK

Sedentary to standingp ValueSedentary to
light stepping on non-workdays
p ValueSedentary to moderate or vigorous stepping on non-workdaysp ValueSedentary to
sleep on
non-workdays
p value
Waist circumference−0.4 (−1.2, 2.1)0.4280.4 (−1.3, 2.1)0.612−0.8 (−4.8, 3.2)0.695−0.4 (−1.1, 0.5)0.215
BMI0.1 (−0.5, 0.2)0.369−0.2 (−0.8, 0.4)0.5090.2 (−1.2, 1.7)0.746−0.3 (−0.5,–0.05)0.019
Systolic BP−0.3 (−1.1, 0.5)0.4970.3 (−1.3, 1.9)0.683−0.01 (−3.7,3.7)0.994−0.6 (−1.2, 0.1)0.076
Diastolic BP−0.5 (−1.2, 0.2)0.167−0.5 (−1.9, 0.9)0.4620.3 (−2.9, 3.6)0.839−0.3 (−0.9, 0.2)0.216
Fasting glucose0.01 (−0.07, 0.1)0.7530.03 (−0.1, 0.2)0.648−0.3 (−0.7, 0.05)0.090−0.00 (−0.06, 0.06)0.931
Triglycerides−0.03 (−0.1,0.04)0.4170.07 (−0.07, 0.2)0.303−0.2 (−0.5, 1.0)0.380−0.02 (−0.08, 0.04)0.500
HDL cholesterol0.02 (−0.01,0.05)0.281−0.05 (−0.1, 0.01)0.1190.07 (−1.0, 0.2)0.3590.0 (−0.02, 0.03)0.732
LDL cholesterol−0.08 (−0.2,0.01)0.0840.0 (−0.2, 0.2)0.919−0.01 (−0.5, 0.4)0.946−0.04 (−0.2, 0.04)0.084
Total cholesterol−0.08 (−0.2,0.02)0.100−0.03 (−0.2, 0.1)0.8870.03 (−0.4, 0.5)0.887−0.03 (−0.1, 0.04)0.368
  • Coefficients represent the factor by which the cardio-vascular markers are multiplied by (95% CI) for a 30 min difference in the substituted physical activity behaviour.

  • BMI, body mass index; BP, blood pressure; HDL, high-density lipoprotein; LDL, low-density lipoprotein; LPA, light physical activity; MVPA, moderate-to-vigorous physical activity; WC, waist circumference.