Why they only recommend 30 days on and 90 days off?
Because it is a steriod and you need time off before running a steriod again. This also requires support supps and a pct.
I know that, hdrol is weak so why only 30 days why not 6-8 weeks?
H-drol can be run for 6 weeks with no problem.
could i pulse hdrol similar to epi?
do NOT pulse Hdrol. The half life is way too long, which negates the purpose of pulsing. I think you would be disappointed with the results
Stick to Epi and SD for pulsing IMO
i know you've been posting here long enough to know the difference between Hdrol and Epi. With pulsing Epi is better since the half life is longer. Hdrol takes a while to kick in.
for an athlete i'd probably say Hdrol but it's a tossup