If I look back at my 50 plus years of lifting my best results were in the college age years and my early 20's. Was it a result of the training principles or the result of being in my athletic prime? I always trained with 1 to 2 sets to failure after warm up.
Sample routine when I was 24 or so when I looked my best. Very Mentzer inspired.
Monday: Thighs, chest and triceps
Leg extensions super set with squats for two sets
leg press 1 x 12
leg curl 2 x 10
Flat flies super set with bench press for two sets
Incline press for 2 x 10
tricep push downs 2 x 10
weighted dips 2 x10
standing calf 2 x 15
seated calf 2 x 15
Some ab work
Tuesday was rest.
Wednesday was back, delt and biceps
pull over super set with chins for two sets
seated cable row 2 x 12
Dumbbell row 2 x 10
Dumbbell delt laterals super set with Press behind the head for two sets
Rear delt dumbbell lateral 2 x 10
barbell curl 2 x10
alternate dumbbell curl 2 x 10
dead lift 6-4-2-1
Barbell shrugs. 2 x 10
back hyper extensions 2 x 15
Thursday: Off
Friday: I would repeat Monday's workout with weekends off.
Next week Monday I would start with the back, delt and bicep workout. Wednesday would be the thigh, chest and tricep workout and Friday would be back to the back, Delt and bicep workout.
This workout system was inspired by Frank Calta and Mike Mentzer.