I think you should listen to your body. When I was younger I use to train 6 days a week. Now that I'm older I find that training one body part a day and then taking one to two days off is suitable. That amounts to 5 days on 1 day off, then start the cycle all over again. My body doesn't recover as fast as it use to when I was younger. In addition to that, there is an increasing belief that lower volume training is more beneficial than high volume training. (as mentioned by a previous poster)
Pat