Hi, I hope I can offer some interesting reading for you. Have a look at a book called 'Identity and Agency in Cultural worlds' Holland, Skinner, Lachiotte Jr and Cain (2003) Harvard press. Particularly chapter 4 'Personal stories in alcoholics anonymous'. This study looked at how taking on the adentity of an AA member shaped new identites in realtion to addiction. Not too far away from how exercise plays a role in recovery for addicts and how that shapes identity so you infact you may have not taken on too much with looking at both aspects. However, something may be gained by distilling and focusing your data more clearly to the research questions so you are not looking at 'everything'. There is a great section at the outset discussing theory in relation to the self and identity. A reference for the origianl study is 'Cain, Carole. 1991 "Personal stories: Identity aquisition and self understanding in Alcoholics Anonymous" Ethos 19:210-253. Hope that helps :-)