For those that know me, I am always into new technology. I blow thousands just on trying out new things. Here is one that is really cool. https://www.bsxinsight.com/ The best tool for high level exercise is a Heart Rate Monitor. However the goal for using it is really to get good Blood Lactic Acid Levels. This new device can supposedly measure your Blood Lactic Acid build-up levels.
Nutrition involves many things. Supplements are one of the most misunderstood. Crap aside (for another video) this shows that how you store and where you store affects the high end good stuff.