using mobile application to promote physical activity among adolescent
Order Description
I want you to write introduction from the articles that i will upload, it is a dissertation introduction about using mobile application and technology to promote and increase the physical activity among people of different ages and especially adolescent age group.
kindly please some of the article i have it online not PDF , so i will upload it as word or i will put the references.

need it 550 words don’t include title or references in the word count.