Question for those doing HST.

[jdef]

I've been doing HST for a while and I've enjoyed some pretty good progress but one thing I don't like is that my muscular endurance has really gone downhill. This is also due to the fact that before HST, I was doing Starting Strength for quite some time.

My question is where can I throw in some muscular endurance exercises, such as plenty of calisthenics, where it won't impede my HST progress. Right now I workout Tuesday, Thursday, and Saturday mornings.

Thanks in advance.