Completed my Friday cardio/resistance workout per schedule.  PWW  235 (lots of food and scotch last night :-( .....    I'm trying to standardize my resistance a bit.  I'm doing three sets of 15 on each exercise and timing the rest interval  and at present, I'm taking a  60 second rest between sets.  In almost all cases, to maintain this, the last set is very tough to complete and sometimes I work to failure or almost failure.  I'm being quite careful about my form; getting full range of motion and doing a little 'negative' on occasion.  My cardio is now 20 minutes (instead of 15) and I'm finishing with my 'max' heart rate in the 130's and an average rate in the 120's, which is an improvement.