Calibration and comparison of accelerometer cut points in preschool children.

Objective: The present study aimed to develop accelerometer cut points to classify physical activities (PA) by intensity in preschoolers and to investigate discrepancies in PA levels when applying various accelerometer cut points.

Methods: To calibrate the accelerometer, 18 preschoolers (5.8 ± 0.

Promoting physical activity at the pre-school playground: the effects of providing markings and play equipment.

Objectives: We aimed to investigate the effects of providing play equipment and markings at the pre-school playground on physical activity engagement levels.

Methods: We performed a cluster randomised control trial. In November and December 2007, a convenience sample of 40 public pre-schools in Flanders, Belgium, was randomly assigned to one of the following conditions: 1) in 10 pre-schools play equipment was provided, 2) in 10 pre-schools markings were painted on the playground, 3) in 10 schools play equipment was provided and markings were painted, 4) 10 schools served as a control condition.

The contribution of preschool playground factors in explaining children's physical activity during recess.

Background: Low levels of physical activity are characteristic in preschoolers. To effectively promote physical activity, it is necessary to understand factors that influence young children's physical activity. The present study aimed to investigate how physical activity levels are influenced by environmental factors during recess in preschool.

Effects of creatine supplementation and exercise training on fitness in men 55-75 yr old.

effect of oral creatine supplementation (CR; 5 g/day) in conjunction with exercise training on physical fitness was investigated in men between 55 and 75 yr of age (n = 46). A double-blind randomized placebo-controlled (PL) trial was performed over a 6-mo period. Furthermore, a subgroup (n = 20) completed a 1-yr follow-up.

Resistance training alters torque-velocity relation of elbow flexors in elderly men.

Purpose: The aim of the study was to compare in vivo dynamic muscle characteristics (torque-velocity relation and maximal contraction velocity) of sedentary young subjects with elderly men before and after training.

Methods: Elbow flexion maximal isometric (Tmax) and dynamic torque at velocities between 100 degrees.s-1 and 600 degrees.