Connecting Data to members only

How do I setup the member to be able to add their own workout with a score and date so they can post them daily? I assume I am going to have a separate workout collection that has the workout, score, and date that then needs to be tied to the member collection. I guess what I am asking is how do I setup the collection so that the workout information is tied to the member to then be able to display the information back to them.