Update:
1) yesterday (Sun., July 26th) was my 5th dose of Cardarine (@14mg.) with breakfast. I hit the gym later for my strength circuit. I try not to make this just "cardio with weights", thus the low reps. So, for example, I do a Dead/Squat with 305 x 5, 325 x 3; D.B. incline bench press with 85s x 5, 90s x 3, just to give you an idea. Well, I shaved ~16% off my time; from 26, to 22 min, allowing myself a couple mins. rest between the 2 rounds of 5 reps, and the 2 rounds of 3 reps. When I can compete all 4 rounds in 20 min. or less, I add weight--a kind of double progression system.
2) So, I won't say it was easy, it wasn't, but Cardarine did allow me to push myself harder. I expect the effect to increase somewhat as that was only my 5th dose. By this We'd. (July 29th), I'll be going up to 21 mg. Last time I trained strength circuits, I got up to 385 x 3 for the dead/squat, and 100s x 3 for the d.b. incline press. We'll see if I can beat it.
3) obviously it's too soon to make any comment about Cardarine's effect of fat burning, insulin sensitivity, etc. I 'm already pretty impressed with its effect on my blood pressure.