I just got done with week 3 of SL 5x5. I am curious if any of you have an recommendations for adding cardio to my routine. When should I do it, and how much? I have a heavy bag I love to hit but I've stayed away from it recently because everytime I start hitting it on a regular basis I find myself getting over-trained and exhausted so I've cut it out to focus purely on strength. Being only 3 days a week I have the itch to do more, but I don't want to sacrifice strength gains and recovery to do it. I'm doing SL 5x5 Monday, Wednesday, Friday. I'm thinking I could do a tough HIIT session on Saturdays. Thoughts? Suggestions?