I had a L3/L4 fusion back in 2020. My back pain before the surgery was through the roof. After the surgery, I did 5 laps around the nurses station and felt GREAT. I was limited to moderate work/exercise for a few months. I also had no complications with the surgery. Chiropractors, cortisone injections & acupuncture did little to help me, but had to do all of those before I was approved for the surgery. You should be fine, especially since you are an active person, like myself. Good luck with your surgery.