How does running help build strong bones?

Weight bearing exercise helps maintain and/or improve bone mass and density, thereby reducing risk of osteoporosis.

The following are good weight-bearing exercises:

• walking
• running
• strength training (including bodyweight and tubing exercises)
• water exercises (not swimming)
• hiking
• dancing

Biking and swimming are good exercises but they are not weight bearing.

I recommend that you walk 30 minutes every day, whether you workout or not. It helps you maintain an active lifestyle. Strength training should be done 3 days a week (20-30 minutes a session) and interval cardio exercise should be done 2-3 days a week (10-20 minutes a session).