Abstract
The purpose of this project was to objectively measure the habitual ambulatory activity of individuals with type 2 diabetes and describe the relationship between this measure and Body Mass Index. Habitual ambulatory activity (defined as steps/day) was measured using a waist-borne pedometer worn on three consecutive days (one weekend day and two weekdays). Subjects were recruited by manual search of patient files at a diabetes education centre. Eligibility was defined as having type 2 diabetes (min 3 months post-diagnosis), treated with oral hypoglycemics or diet only, aged 40–60 years, and no reported physical activity limitations or heart conditions. The sample (N = 160) consisted of 98(61.3%) males and 62(38.8%) females (age = 52.4 ± D5.3years; BMI = 32.3 ± SD5.7Kg/m2). Duration of diabetes was 1.9 ± SD2.2years. Activity level for the entire sample averaged 6,662 ± SD3,077 steps/day. Mean steps/day were slightly lower than similar-aged samples without diabetes, however, mean values were higher than those in samples with more restrictive chronic conditions such as claudication, joint replacements, chronic obstructive pulmonary disease, and chronic heart failure. Steps/day and BMI were inversely correlated (r = −0.27,p < 0.01). Pedometer-determined tertiles of activity were defined as low (≤ 25th percentile or ≤ 4,716 steps/day), moderate (25th to 75th percentile or 4,717–8,644 steps/day), and high (≥ 75th percentile or ≥ 8,645 steps/day). BMI differed significantly across activity tertiles (p < 0.01) with individuals in the high activity tertile having a significantly lower BMI than those in either the moderate or low tertiles, which did not differ significantly. The data from this project provides normative data on pedometer-determined activity in individuals with type 2 diabetes and may be useful in exploring factors related to activity level, screening for levels of risk, and planning targeted interventions. Supported by Canadian Diabetes Association
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