I have a short question out of pure interest.
For many years I had problems developing explosivness (26inch standing vert at a long limbed 2,3xBW squat) even when I stopped strength training and only did sprints & plyos.
In the last weeks I steadily improved like never before by simply doing shorter workouts (4x45-60min) instead of 3-4x90-120min) so it looks like I was overreaching for years without going into real overtraining, but also without adapting.
How can that happen with pure sprint & plyo phases? Even if the stress is high, shouldnt the body get used to it after a few months and start do adapt?