MVPA in children/adolescents with chronic disease appear to be well below guideline recommendations , although comparable with activity levels of their healthy peers except for children with malignancies .
CONTEXT Moderate-to-vigorous physical activity ( MVPA ) and sedentary time ( ST )  are important for child and adolescent health .
OBJECTIVE To examine habitual levels of accelerometer measured MVPA and ST  in children and adolescents with chronic disease , and how these levels compare with healthy peers .
Fitness and physical activity in youth with type 1 diabetes mellitus in good or poor glycemic control.
BACKGROUND Patients with type 1 diabetes mellitus ( T1DM ) may experience poor muscle health as a result of chronic hyperglycemia . Despite this , muscle function in children with T1DM with good or poor glycemic control has yet to be examined in detail . OBJECTIVE To assess differences in muscle-related fitness variables in children with T1DM with good glycemic control ( T1DM-G ) , as well as those with poor glycemic control ( T1DM-P ) , and non-diabetic , healthy controls . SUBJECTS Eight children with T1DM-G [ glycosylated hemoglobin ( HbA1c ) ≤ 7.5 % for 9 months ] , eight children with T1DM-P ( HbA1c ≥ 9.0 % for 9 months ) , and eight healthy controls completed one exercise session .  METHODS Anaerobic and aerobic muscle functions were assessed with a maximal isometric grip strength test , a Wingate test , and an incremental continuous cycling test until exhaustion . Blood sample s were collected at rest to determine HbA1c at the time of testing . Physical activity  was monitored over 7 d using accelerometry . RESULTS Children with T1DM-P displayed lower peak oxygen consumption ( VO2peak ) values ( mL/kg/min ) compared to healthy controls ( T1DM-P : 33.2 ± 5.6 , controls : 43.5 ± 6.3 , p < 0.01 ) , while T1DM-G ( 43.5 ± 6.3 ) had values similar to controls and T1DM-P. There was a negative relationship between VO2peak and HbA1c% ( r = -0.54 , p < 0.01 ) . All groups were similar in all other fitness variables . There were no group differences in physical activity variables . CONCLUSION Children with T1DM-G did not display signs of impaired muscle function , while children with T1DM-P have signs of altered aerobic muscle capacity
MVPA in children/adolescents with chronic disease appear to be well below guideline recommendations , although comparable with activity levels of their healthy peers except for children with malignancies .
CONTEXT Moderate-to-vigorous physical activity ( MVPA ) and sedentary time ( ST )  are important for child and adolescent health .
OBJECTIVE To examine habitual levels of accelerometer measured MVPA and ST  in children and adolescents with chronic disease , and how these levels compare with healthy peers .