I seem to notice that I am cramping quite often. I am in week 11 of a Test E cycle, and have noticed on top of low back pumps I get cramps elsewhere.

For example, on arm day I can't sit with my arms at a 90 degree angle without extending them VERY slowly to prevent forearm/biceps cramps(charlie horse sensation)

I don't feel it's a vitamin of hydration deficiency since I drink around 2 gallons a day and supplement Multi, B-complex, Vit. E, Vit. D, Omegas, and Vit. C. I also get plenty of sodium through my diet. Perhaps potassium would benefit, but my multi vit. should suffice right?

Any ideas?? Any advice other than stretching which I already do?