Sentence 1: Tim was always a little chubby. 
 Sentence 3: He asked his friends to help him get in shape 
 Sentence 4:  They trained together every day 
 Sentence 5:  Tim is now in great shape and is a body builder 
 Option 1: Eventually he got tired of exercising so he let himself go. 
 Option 2: Eventually he got tired of the way he looked.