Weekly frequency, total time, total volume and energy expenditure of different physical activity subtypes and vigorous physical activity in unimpaired preterm-born VLBW and term-born control young adults.

Physical activity is expressed in units/week in this table to make the numbers easier to interpret.VLBW = very low birth weight (ageometric mean of n+1 subtracted by 1;geometric mean denotes the nth root of the product of n individual values.bgeometric standard deviation of n+1; geometric standard deviation denotes the relative increase in a variable corresponding to one standard deviation unit change in the logarithm of the variable.cMET×hours of physical activity/week (MET = metabolic equivalents; ratio of metabolic rate during exercise and estimated metabolic rate at rest; 1 MET corresponds energy expenditure of approximately 1 kcal/kg×hour).dall physical activity with MET ≥5, including conditioning, non-conditioning and commuting activity.Differences between VLBW and term are presented in Table 3.