wondering your thoughts. I used to find this devastating on my heart and my performance would suffer (jack3d old formula). A few days ago i came home exhausted after work but felt i needed to get a run in on a nice San Diego day. chugged 2 scoops of c4 and took off. logged the best 6 miles i have ever ran in a few years. felt great. not sure if i was a fluke or the formula. wondering how everyone else here reacts to preworkout and long cardio.
thanks.
-Kurt