cramps

Why do I get strong calves pain while trying to do cardio on rad-140 and mk677 (10mg ED)? And any ways to fix it?

After I started adding tren as of two months ago I noticed I was getting this really annoying cramps or short term spasms - almost everywhere. I thought it was the tren. At first I got worried because bad constant cramps could be an indication of kidney damage. And since it didn't start until...