Do not read anything that arnold said he did
Sure it may work but we are past that era and now realise that volume is not the only way to create growth
Progressive tension overload is = adding more weight
My prefered method is low volume, super high intensity
Example of my chest routine
Benchpress 45(warm up), 90(warm up 20reps), 135 (warm up 6 reps), 180(warm up 4 reps), 200 ( work set, 10 reps, followed by rest pauses, drops, static holds etc...
Incline benchpress 135(warm up), 200 (work set similar to last work set)
Job done!
Just make sure you come next week and beat this weeks weight or reps