Schneider et al., (2007) conducted an intervention that evaluated the impact a school-based intervention had on the fitness, physical activity and bone density of adolescent females. Two high schools were included in the intervention, both within the same school district and similar resources and facilities. The intervention was conducted over three consecutive years to maintain a manageable class size, where the average class size was 40 adolescent girls. The intervention strategies included supervised in-class activity, health educations sessions and internet-based self-monitoring. The intervention group met for 60 minutes a day, 5 days a week with each day incorporating different physical activities. These included a variety of aerobic exercises
