After 10 years, no mention of periodization? That's a bit sad.

I've been focusing on cutting time while keeping a good level of overall fitness (Muscle, Core, Cardio, Flexibility).

Can you give me an example of periodization? perhaps I have some data I can collect to give you what you're looking for.

https://www.unm.edu/~lkravitz/Article%20folder/periodization... https://breakingmuscle.com/fitness/a-simple-guide-to-periodi... https://barbend.com/3-most-common-types-periodization-when-t...

My comment was based on surprise that after 10 years of training you have yet to incorporate any sort of periodization considering it is a cornerstone of sport science.