abstract parasitic insects face many decisions when foraging for host, some for example frequently have to make decisions with regard to staying in or leaving their current patch. in this study, we investigated how the foraging and oviposition behavior of lysiphlebus fabarum is influenced by (1) a female’s previous experience of encountering aphids host and (2) age of female parasitoids. to tes...

BACKGROUND Physical activity and sedentary behavior habits are established during early childhood, yet only recently has objectively measured data been available on children aged 5 years and younger. This study presents data on the physical activity and sedentary behaviors of Canadian children aged 3-5 years. METHODS Data were collected as part of the Canadian Health Measures Survey between 2...

Schools have been postulated as ideal environments to encourage physical activity (PA). This study aimed assess the relationship between PA in school hours, motor competence, and screen time a sample of Spanish preschool children. Fifty-seven 4–5-year-old preschoolers (n = 32 girls) participated. The Garmin Vivofit wristband was used measure levels during hours week. Sedentary behavior estimate...

BACKGROUND It has been generally assumed that activity-related parenting practices influence children's activity behavior and weight status. However, vice versa parents may also change their parenting behaviors in response to their perceptions of their child's activity behavior and weight status. This study examined the bidirectional relationships between activity-related parenting practices, a...

A sedentary lifestyle can be defined as “a type of lifestyle with little or no physical activity”. Sedentary behavior includes reading, computer use, watching television, office work, and cell phone use. A similar but somewhat different term is screen time. This is the sum of the time spent viewing a television, computer monitor, mobile device, or other screen. Prospective evidence is accumulat...

Task Force Finding The Community Preventive Services Task Force recommends behavioral interventions to reduce recreational sedentary screen time among children aged 13 years and younger. This finding is based on strong evidence of effectiveness in reducing recreational sedentary screen time, increasing physical activity, improving diet, and improving or maintaining weightrelated outcomes. Evide...

OBJECTIVE Few prospective studies have examined separate forms of screen time in relation to adiposity. Our objective was to assess independent relations of television, electronic games (video/computer), and digital versatile disc (DVD)/videos and total screen time with change in adolescent BMI. METHODS Using data from the 2004, 2006, and 2008 waves of the ongoing Growing up Today Study II, w...