hey guys i have been on var for about 4 weeks, turinabol for 2weeks and furazabol for 1 week i am very plz with my strength and size gains, but i have getting very tight in my hamstring region and it takes forever to get warm before speed and agility workouts i am worry that i may pull a hammy. i also get these crazy pumps in my lower back and calves, what can i do to solve this problem.