Ok guys I need your help here, I am 31 years old 184cms HT and 83Kgs WT, I have small frame.I started workin out when I was 27 with good results (I was 62KGS!) but then due to personal problems I stopped,now I want to start again for good...what do u suggest? A four - five day split routine trainin 1 muscle group at a time is it ok for me? Or should I train the upper body and then the lower body in different days?