Individuals with type 1 (insulin-dependent diabetes mellitus [IDDM]) and ty
pe 2 (non-insulin-dependent diabetes mellitus [NIDDM]) diabetes should be e
ncouraged to exercise. Although there is an absence of consistent evidence
that adaptations to routine exercise improve glucose control in type 1 diab
etes, there is evidence that shows improved glucose control in individuals
with type 2 diabetes. Although both groups benefit from exercise, the merit
and suitability of routine exercise is measured by the extent to which the
advantageous adaptive effects of regular exercise surpass the risks of a s
ole bout of exercise. In addition, when considering acute versus routine ex
ercise, special considerations must be given to children with diabetes and
older adults at risk for insulin resistance. Finally, a greater research fo
cus is needed on engaging in competitive and recreational sports so that ch
ildren and adults with diabetes may participate safely in activities such a
s baseball, swimming, basketball, soccer, and hockey.