I noticed that my jumps would peak/PR after 2~3 weeks of having frequent jump sessions and plyo training. My vertical would linearly go up as I practicing jumping and doing plyo's. After those 2~3 weeks, I would stop and not really jump for like a week or more. My jumps drop again back to where it was.
My question is, is this ALWAYS going to be the case, or is it a situation where if I at the least keep practicing max effort jumps longer than 2-3 weeks, the gains will stay longer? Is it that 2-3 weeks of initially jumping higher isn't a long enough time for my body to adapt and grasp this new ability?