The last workout I had was 5 minutes in length and it was a taxing workout; it's all about getting the most out of what you're doing and not being overly concerned with the time duration aspect.
Does cortisol impact after a certain length of time, no idea really; we see people that workout for a good number of hours and still make great progress and they can't all be the exception to the rule about the effects of cortisol. Do the length of breaks make a substantial difference as to how and when cortisol actually kicks in? Again, no idea, and I doubt there are any studies which have taken all these variables into account anyway.
There are lots of varying approaches, from the posts above, and they all seem to be working and that's the most important thing.
If workout time is cutting into other areas of your life or you find you just cannot drag yourself away from the gym, that's the time to reassess.
36.5 kg /80.3 lb Middle-Finger DL (right hand)...
Last edited by 5kgLifter; 12-15-2011 at 08:25 AM.
Reason: lots not lost :)