I don't necessarily think losing bw makes that big of a difference in overall strength. I've lost 25 pounds this year but all my lefts have gone up. I'm still 5 pounds heavier than I was when I was at my peak strength. I know I can get back to that point (been about 8 years). The difference now to then is it more motivated and driven to lift harder rather than when I was 21 I would just keep stacking weight not worrying about hurting myself. Now I push my myself a little further each week.