I totally understand what kind of job you had. I work at a Wally World distribution center. Started in shipping, loading about 3 to 4 full semi’s a day. Didn’t know how much weight I loaded. Then switched to non conveyable. When in dog food, I’d stack about 60k/lbs in 12 hours. That was MUCH easier than shipping. My first year, I struggled. Then I talked to my bro-in-law, who is a personal trainer, found and I started to do good. I was taking creatine and C4 prior to work, and took an Animal Pak with UniLiver every break, while eating protien every 3-4 hours. This brought me to Muscle for Life and The Books. I’m in maintenance department now, and are about to join a gym. I’ve been wanting to get the Legion multi’s and switch to Legion supplements. I’m about done reading BLS, and are gonna start the year one challenge. I’ve aready bought BBLS and Shredded Chef. I get excited every time I think about my goals.
Sometimes balance issues other than a rounded back can be a problem, especially when the hips rise faster than the shoulders. If you don't have a spotter, it would be a good idea to position your exercise benches within reach of a stationary object such as a post, power rack, personal trainer's head, or parallel bars, etc. In this way you can reach out and grasp the object to help you through a sticking point. An added bonus here is that you can, by using an upright fixed object, maintain a very upright squatting position. This will create maximum muscle tension on the thighs and minimize stress on the lower back.