Kathleen F. Janz

TL;DR: The calibration of four different accelerometers used most frequently to assess physical activity and sedentary behavior in children are reviewed and alternative data processing using the raw acceleration signal is recommended as a possible alternative approach where the actual acceleration pattern is used to characterize activity behavior.

TL;DR: Considering the evidence-based literature review, the National Osteoporosis Foundation recommends lifestyle choices that promote maximal bone health from childhood through young to late adolescence and outline a research agenda to address current gaps in knowledge.

TL;DR: Boys were less sedentary and more active than girls at all ages, and overweight/obese participants were less active than their normal weight counterparts from age seven onwards.

TL;DR: Observations suggest that preventive efforts focused on maintaining physical fitness and physical activity through puberty will have favorable health benefits in later years.

TL;DR: Sedentary behavior, including TV viewing, is moderately stable during middle childhood, and health promotion programs that specifically target maintaining high levels of vigorous activity and low levels of TV viewing may help reduce the increasing prevalence of childhood obesity.