Validity and Reliability of Smartphone Applications for the Assessment of Walking and Running in Normal-weight and Overweight/Obese Young Adults.

Background: The suitability of smartphone applications (apps) currently used to track walking/running may differ depending on a person's weight condition. This study aimed to examine the validity and reliability of apps for both normal-weight and overweight/obese young adults.

Methods: Thirty normal-weight (aged 21.