what is rest?

[try-n]

Hi. I've done a search and gotten a few answers,but would like to get some more direct answers. I'm 45,have been active but only this year started adding weights to my quest for better fitness. I'm basically using the 'anabolic workout guide' as listed on this site,with some minor variations. Body split into 4 groups,each gets worked every 8 days,1 day of complete rest in there.I'm doing 45 min of cardio every morning but leg day,and 25 or so at night.I feel I could do more but am trying to recognize rest as a critcal factor. How does that sound as far as not overtraining? What does a rest day mean? I'm not suppossed to lay in bed with a feeding tube attached waiting for my nurse to roll me out of the wet spot when I pee, right? What is a reasonable activity level on rest days? And one more question- how do I know if I've really lifted a weight to point of failure,or is it just my stupid brain saying I can't do one more rep? Thanks for taking the time to read this,any input will be mulled over. Aslo,if relavant,I'm on hrt.1.8 hgh 5on/2off,just started,and 400mg test cyp plus 300mg deca every week,2 weeks into a 10 week cycle right now.I hope my diet is good,there are so many conflicting opinions I'm a bit confused. I sure don't eat any crap. 6 meals a day,salmon,potato, brocoli or salad ,4 slices turkey, tomato, carrot, parmesian cheese and vinegar are typical meals. All organic. Thanks again.