To All who have replied, thank you for all of your responses. I just want to clarify one thing. I haven't been working out for only 2 months. I'm 33 years old and I have been working out on and off since I was 14 years old. I used to lift heavy and hard in my early 20's which most likely was not a good idea since I now have a bone spur in my right shoulder because of it. I stopped working out for about 3 years after having 2 kids. Which was a huge mistake, really let myself go! For the past 2 years, I have been exercising again. I took the summer off because it's the summer and it always happens to me vacations, going to the beach etc. I need to learn to keep it up in the summer and NOT stop. But anyways, I started exercising again for the last 2 months and then the back pain hit me. I believe it is from the insanity work outs since they have you jumping around and I'm not used to that. What I plan on doing is resting for the rest of the week and keep taking Motrin. I will start again this weekend and I will work on strengthening my lower back and abs. I'll start with walking on an incline instead of jogging and ease my way to running again like I was. Lift weights and not to heavy. I'm going to buy Ostarine from pureessence and do a 6 week cycle. I took ostarine last year in the winter and I LOVED IT!!