Had what I thought was one of my best workouts to date yesterday (pull b in your ppl routine) but near the end my forearms felt like they were going to explode... they were hard as rocks, almost sore to touch and I kept opening and closing my hands to try and relieve them. Not sure if this is good or bad? I pushed through and finished but wondered if that was the right choice or if it's poor circulation or a strange build up on my part. A few hours later everything is fine but curious to know if this is a good sign or bad.