Contribution of the school journey to daily physical activity in children aged 11-12 years.

Background: Active travel is a possible method to increase physical activity in children, but the precise contribution of walking to school to daily physical activity is unclear.

Purpose: To combine accelerometer and GPS data to quantify moderate-to-vigorous physical activity (MVPA) on the walk to and from school in relation to overall daily levels.

Methods: Participants were 141 children aged 11-12 years from the PEACH Project (Personal and Environmental Associated with Children's Health) in Bristol, England, measured between 2008 and 2009.

Active travel and physical activity across the school transition: the PEACH project.

Purpose: Physical activity in youth decreases with age, with the transition from primary to secondary school being a key period for change. Active travel to school has been associated with higher physical activity in youth compared with those who travel by car. This study investigated whether change in travel mode to/from school was associated with change in physical activity among young people transitioning from primary to secondary school.

Cognitive performance during prismatic displacement as a partial analogue of "space fog".

Background: The fact that microgravity adaptation and recovery from the cognitive deficit of "space fog" follow approximately the same time course raises the possibility that they are related to one another. Two experiments tested this hypothesis.

Methods: Because microgravity adaptation is unique to outer space, we investigated the Earth-based analogue of adapting to prismatic displacement.