Great point. I'm trying to be careful about not overworking and sticking to manageable weights, but it's possible I still need to back off. Weirdly, though, my problems tend to crop up on bodyweight assistance work like pushups, pullups, or dips.
Also, it's possible to over stretch before a workout, especially if you're doing static stretches. I mostly stick to dynamic stretches pre workout.
This is another reason I don't really like Simple 6 as part of a warm-up -- too static.
Thanks for the input!