Programs / Conditioning
Engine Builder Conditioning
A six-week, four-day plan to grow aerobic base, then add intervals, so hard efforts feel more repeatable.
- Length
- 6 weeks
- Days / week
- 4
- Session time
- 35–60 min
- Level
- Intermediate
Who it's for
Athletes who can already move for 20–30 minutes at an easy pace (run, row, bike, or ski) and want a better engine for sport, mixed training, or general fitness. This is not a couch-to-run plan and not a high-intensity-every-day plan.
Goal
Build a larger easy-pace base, introduce sustainable intervals, and leave one day each week for mixed, sport-like work without turning every session into a sprint.
Equipment
- A way to go easy and steady: run, row, bike, ski erg, or a combination
- A clock or watch
- Optional: kettlebell, jump rope, and a space for shuttles
Warm-up
- 3–5 minutes very easy on the session machine or a walk
- 10 marching drills, 5 gentle leg swings each side, 5 inchworms
- Two 20-second build-ups only on interval days, not on easy days
Cooldown
- 3–5 minutes very easy movement
- Calf, hip flexor, and hip stretch, 30 seconds each
- Easy nasal breathing until you can talk in full sentences
Weeks 1–3: Grow the base
Weeks 1–3
Most of the week is easy, sustainable work. Intervals stay short and controlled. Add 3–5 minutes to one easy session each week if the previous week felt recoverable.
Day 1 — Easy aerobic
35–45 min
| Exercise | Sets | Reps / work | Intensity | Notes |
|---|---|---|---|---|
| Easy run, row, bike, or ski | 1 | 30–40 min | Conversational, RPE 3–4 | Nasal breathing if you can. If you cannot talk, slow down. |
| Optional easy walk after | 1 | 5 min | Very easy |
Day 2 — Controlled intervals
30–40 min
| Exercise | Sets | Reps / work | Intensity | Notes |
|---|---|---|---|---|
| Easy warmup | 1 | 8–10 min | RPE 3 | |
| Work intervals | 6–8 | 60 sec hard / 90 sec easy | RPE 7, not a sprint | Week 1: 6 rounds. Week 2: 7. Week 3: 8. Keep the easy parts truly easy. |
| Easy cooldown | 1 | 5 min | RPE 2–3 |
Day 3 — Easy or steady
30–40 min
| Exercise | Sets | Reps / work | Intensity | Notes |
|---|---|---|---|---|
| Easy aerobic, slightly shorter than Day 1 | 1 | 25–35 min | RPE 3–4, or a 10-minute steady middle at RPE 5 | If Day 2 left you flat, keep the whole session easy. |
Day 4 — Mixed, sustainable
30–40 min
| Exercise | Sets | Reps / work | Intensity | Rest | Notes |
|---|---|---|---|---|---|
| 4 rounds, not for a time that wrecks you | 4 | Each round: 8 kettlebell or dumbbell swings, 8 push-ups or elevated push-ups, 8 box or bench step-ups each side, then 1 minute easy walk or easy row | RPE 6–7 | As needed so form stays clean | No score chasing. Rest so the next round looks like the first. |
| Easy spin or walk to finish | 1 | 5 min | RPE 2–3 | — |
Weeks 4–6: Add a little intensity
Weeks 4–6
Easy days stay easy. Intervals get a bit longer. The mixed day can include a short shuttle or jump-rope bout. Week 6 trims one interval and one mixed round so you finish the block feeling capable, not emptied out.
Day 1 — Easy aerobic
40–55 min
| Exercise | Sets | Reps / work | Intensity | Notes |
|---|---|---|---|---|
| Easy run, row, bike, or ski | 1 | 35–50 min | Conversational, RPE 3–4 | This remains the most important day in the week. |
Day 2 — Longer intervals
35–45 min
| Exercise | Sets | Reps / work | Intensity | Notes |
|---|---|---|---|---|
| Easy warmup | 1 | 10 min | RPE 3 | |
| Work intervals | 4–5 | 2 min hard / 2 min easy | RPE 7–8 | Week 4: 4 rounds. Week 5: 5. Week 6: 4, slightly smoother, not faster. |
| Easy cooldown | 1 | 5–8 min | RPE 2–3 |
Day 3 — Easy with an optional steady block
30–40 min
| Exercise | Sets | Reps / work | Intensity |
|---|---|---|---|
| Easy aerobic with 8–12 minutes steady in the middle if recovered | 1 | 30–40 min | Easy RPE 3–4, steady block RPE 5–6 |
Day 4 — Mixed, a little sharper
35–45 min
| Exercise | Sets | Reps / work | Intensity | Rest | Notes |
|---|---|---|---|---|---|
| 5 rounds (4 in week 6) | 5 | 10 swings, 10 sit-to-stands or goblet squats, 8 burpee step-backs or 6 burpees, 100 m easy jog or 30 jump-ropes, then walk 60–90 sec | RPE 7 | 60–90 sec | Burpee step-backs if a full burpee irritates your back or wrists. |
| Easy cooldown | 1 | 5 min | RPE 2–3 | — |
Scaling
If you cannot hold a conversation on an easy day, you are going too hard — slow down or walk. Swap running for a bike or rower if joints need a break. Cut interval repeats before you cut warmup and cooldown. If your legs are heavy two days in a row, turn the next interval day into an easy day.
Notes
Use a simple intensity language: easy means conversational (roughly RPE 3–4). Steady means you can talk in short phrases (RPE 5–6). Hard intervals are RPE 7–8, not all-out. Space the four days as Easy, Intervals, Easy or rest, Mixed, then rest. Walking on off days is encouraged.
These programs are general educational guides, not personalized coaching or medical advice. Consult a qualified physician before starting a new training plan, especially if you have an injury, a medical condition, or you are returning from time off. Learn the movements first, scale the load and volume to your current ability, and stop any exercise that causes sharp or unusual pain. When a lift or skill is new — particularly Olympic weightlifting, sprinting, or contact-sport work — consider in-person coaching. You are responsible for how you use this information.
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