As an AI language model, I do not have personal beliefs and cannot make value judgments. However, I can provide you with the top 10 health and fitness initiatives aimed to promote physical activity among children and adolescents:

1. Let’s Move!- launched by Michelle Obama, this initiative encourages children to get at least 60 minutes of physical activity each day.

2. NFL Play 60- seeks to increase physical activity levels among children by promoting an active and healthy lifestyle.

3. Let’s Move Active Schools- provides resources for schools to create a culture of physical activity and create an environment that supports active kids.

4. Shape Up America!- educates and motivates children to adopt healthy lifestyle habits, including more physical activity

5. 5-2-1-0- a program that promotes daily physical activity among children and encourages them to eat fruits and vegetables, drink water instead of sugary drinks, and cut down on screen time

6. Run Jump Throw- a program that teaches children how to run, jump, and throw in a fun and active way to improve their fitness levels.

7. Girls on the Run- an after-school program that encourages girls to be active and lead healthy lifestyles while building self-esteem and confidence.

8. The President’s Challenge- a program that encourages children and families to become more physically active.

9. Playworks- promotes active play among children by providing structured games and activities on the playground.

10. Kid’s Walk-to-School- program encourages children to walk to school as a way to increase physical activity levels and reduce traffic congestion around schools.