I've been working out on and off for about a year.. for the first few months i would be in the gym for like 3-4 hours.. then its decresed from there.. now i go every now and then and leave within 45 minutes.. i dont think its caused by lazyiness but by lack of motovation... im 6'1 215lbs about 15% BF +\-... i like working out.. but as soon as i get to the gym i feel tired and unwilling to continue.. is there a easy way to motovate my self?