Report the regression including all independent variables before checking on multicollinearity. Report your check on multicollinearity. If multicollinearity is a problem, delete one of the offending IVs and rerun the analysis. Percent overweight is also often used. Appearance anxiety, body image, and eating disordered behavior are all well-established measures.
All variables are continuous.
Report the regression with all IVs before running a collinearity check. Report both b and beta weights. Run the collinearity check and report your conclusions. If collinearity is a problem, add the collinear variables together and rerun the regression analysis. Report the b and beta weights.