You mention that you track everything about your workouts, nutrition, sleep, etc. I'm guessing most of your spreadsheets are homegrown - do you mind sharing (offline is fine...)? I've started to build my own but if there's something out there that works, I'd love to use that at least as a starting point?
A simple spreadsheet does the trick, plus it allows the maximum flexibility for later analysis. Happy to share a template offline. Email me direct please.