Some very good advice already about lifting and working out, but I want to address what you mentioned in your OP about dropping your dosage because of issues with hematocrit and BP.
What's your injection frequency? In my personal experience, 80mg 2x/week (160mg/week total) raised my lifelong perfect BP to 160/80 and gave me 24/7 headaches even after waiting 3 months for things to really settle down.
Very quickly after moving to 22mg/day (154mg/week, basically same as 160mg/week), all those negative side effects went away and my hematocrit also came down.
I know
@Vince also mentioned not having to donate blood anymore after moving to daily injections.
Maybe something worth trying if you're injecting infrequently. It could easily be the reason behind the negative side effects you're seeing