What linear assumes

Classical linear periodisation moves you from high volume / low intensity to low volume / high intensity across a 12–16 week cycle. The model assumes a clean weekly recovery surface: you finish Monday, you are recovered by Wednesday, you push again Thursday.

For a college athlete with a flat schedule, this works. For a 35-year-old client who runs three times a week, lifts twice, has a job and a toddler, the recovery surface is corrugated. Every week looks different. The Monday-to-Wednesday recovery assumption breaks the first time someone gets a cold.

Why hybrid breaks the model

Hybrid clients carry two recovery debts simultaneously: a strength-system debt and an aerobic-system debt. Linear periodisation only has one knob (volume going down, intensity going up). It cannot independently address one of those debts without breaking the other.

Push intensity in the strength system and the conditioning suffers. Push volume in the conditioning and the lifts stall. The linear block ends and you have made no real progress in either domain.

The block alternative

Block periodisation gives you what linear does not: two independently rotatable knobs. You can run a strength-emphasis block while keeping conditioning on a maintenance dose, then flip. The recovery debts get paid down one at a time instead of both at once.

  • Weeks 1–3 (Hypertrophy block). Lifting at moderate volume, conditioning at maintenance (1–2 zone-2 sessions, no threshold work).
  • Weeks 4–6 (Strength block). Lifting at higher intensity / lower volume, conditioning at full maintenance.
  • Week 7 (Recovery week). Both systems light. The actual deload, scheduled, not reactive.
  • Weeks 8–10 (Conditioning block). Lifting at maintenance (2 sessions, sub-maximal), conditioning at full prescription with one threshold session per week.

Practical setup

The block model is harder to write than linear because you are managing two prescriptions in parallel. The payoff is that when a client has a bad recovery week, you can drop the active block by 20% without breaking the maintenance prescription. Linear gives you nothing to grab.

Most coaches I have moved from linear to block on hybrid clients see two changes inside the first month: fewer missed sessions, and better RPE compliance in the active block. The model fits the schedule the client actually has.