This is my first post so try not to be too hard me guys, lol. I'm 38 and had an ACL repaired in college from hoops. I was able to get my vertical back to 40 plus and maintain it with constant plyo's, squats, leg press, calf work and jumping rope. I like to do some plyo's after cardio and sometimes jump rope for 1 minute in between leg sets. That has worked for me. Box jumps, broad jumps, medicine ball toss ups, and sprinting from one sideline to the other 8 to 16 times helps sprint speed for me. Hope this helps. Consistency is key.
Invalid Link Removed