Intro Revision:
This introduction needs a lot of work. There are only two citations in the intro and the intro is too short. It should start general and get specific. Provide an overview of the literature and provide evidence. Paragraphs should start with a topic sentence, followed by elaboration, and then evidence and a link to the next paragraph (TEEL structure has been attached). There should be a clear statement of the problem–what is the issue you are hoping this study could address. Why is it important to elucidate the relationship between physical activity and wellbeing? What will this help us understand? The main expectation on this section (for the grade, but also in writing in general) is to craft an argument. Again, I think this is a really good start, and I think you can certainly meet that expectation by the time the paper is due.
The Introduction draft to be edited has been attached along with the following materials: Reaearch Study Citations with a Summary for 10 pieces of literature related to this topic are attached. The (TEEL) structure for introduction section of research paper has also been attached. Lastly, instructions for the introduction & APA Style guidelines have been attached.