PLPPLP is the canonical 6-day MuscleBuddy split. The order — Push, Legs, Pull, Push, Legs, Pull — gives every major muscle two stimulating sessions per week and inserts Legs between the two upper days so push and pull movements never stack back to back, protecting shoulders, elbows, and recovery.
Each pattern gets one heavy wave (lower reps, higher intensity, big compound first) and one volume wave (more sets in the 8-15 rep range, more isolation, more machines). Heavy waves drive strength adaptation; volume waves drive hypertrophy. Both are necessary — neither alone maximizes growth.
Default progression is double progression on the working sets: stay in the prescribed rep range, hit every rep with sound form, and add a small weight increment next session. Top sets sit at RPE 8 to leave 2 reps in reserve; isolation pushes RPE 9.
At 6 days a week, recovery is the limiting factor. MuscleBuddy watches weekly RPE trends, stalled lifts, and sleep markers — if you accumulate fatigue, the engine prescribes a targeted deload (only the over-fatigued muscles) or a full mesocycle-end deload, then restarts the next block with a fresh strength baseline.