GPP- General physical preparedness. Basically preparing the body for more intensive and specific work later on, and laying a foundation to build upon. If youre goal is to jump higher, in a gpp phase, youd do things like short sprints, sub max jumping drills/movement effeciency work, general strength training work, stretching, specific energy systems conditioning, mobility and flexibility work, etc. You could then transition into a more SPP type phase, incorporating higher intensity jumps, lifts, etc. Without the gpp present, the spp will be less effective, gains will be shorter lived, and entail a higher risk of injury.
