chiro told me to lay off heavy weights until my back gets better. i can do 30 minutes of cardio everyday and 1 hour of light weights 3-4 days a week. no heavy benching, squatting or deadlifts.
No worries bro. Trust me, you can get just as sore using 12-15 rep range instead of 8-5. Just use intensyfying techniques. Supersets, drop sets, pre-exhaustion, etc.
try doing very slow reps...like 4-5 seconds up, 4-5 seconds down...and do that in the 10-12 rep range. You'll be amazed at the workout you get from using lighter weights using VERY slow reps.