Often it’s the simplest means which yield the most meaningful...

Dwain Chambers ran 9.97 in the 100m and 6.42 in the 60m and when you look at his training, it’s a great representation of sound principles applied appropriately.
•Heavy jump squats
•Ballistic training (high pulls)
•Traditional squats
•Step-ups, jumps, and submax accessories
•Slow eccentrics and isometric holds
A wide spectrum of plyometrics - from extensive to intensive. Bounds, hurdle hops, depth jumps, and loaded jumps.
It’s another reminder that almost everything being pushed today already existed in some form. The key is understanding the why behind it, and how to apply it.