Week 1 of a new training block should feel too easy because you are re-establishing a baseline, not proving fitness. Starting light lets your body absorb the new stimulus, protects against early injury, and leaves room to progress across the block. As of 2026, the athletes I coach who start conservatively almost always finish the block stronger than those who go hard from day one.
- Week 1 sets a baseline you build on, not a peak to match.
- Starting ~10–20% below your capacity leaves headroom to progress.
- In THETA's coaching data, the most common block-killer is going too hard in week one.
Why start a block below your capacity?
A training block works by progressive overload. You add a little load, volume or intensity each week so your body keeps adapting. If you start at your ceiling in week one, there is nowhere to progress to; you either plateau immediately or overreach and break down. Beginning deliberately under capacity gives you three or four weeks of room to build before you deload and reset. In my coaching experience, the athletes who "win" week one by hammering every session are the same ones limping into week three, having spent all their headroom at the start.
What does the block actually build if week one is easy?
Starting easy does not waste time. It lays the foundation the harder weeks stand on. Week one re-grooves movement patterns, wakes up the aerobic system and lets tendons and connective tissue catch up before the load climbs. It also gives you an honest baseline: you learn what a given pace or weight feels like fresh, so you can judge progress across the block rather than guessing. The real work of a block happens in the middle weeks, and those only land well if week one prepared the ground rather than dug a fatigue hole.
| Week | Relative effort | Job of the week |
|---|---|---|
| 1 | ~80% (feels too easy) | Baseline, re-groove, absorb |
| 2 | ~90% | Build load and confidence |
| 3 | ~100% (hardest) | Peak stimulus of the block |
| 4 | ~60% (deload) | Recover and consolidate gains |
How do you set the right week-one load?
Aim to finish every week-one session feeling you could have done more.
- Take your recent best sustainable pace or weight as a reference.
- Start the block at roughly 80–85% of that.
- Leave two or three reps, or a gear of pace, in the tank on every effort.
- Progress by a small increment each week toward a week-three peak.
- Deload in week four before the next block starts higher than the last.
Doesn't starting easy waste a week of training?
No. This is the most common objection, and it misreads how adaptation works. Fitness is not built by the single hardest session; it is built by the accumulation of sessions you recover from and repeat. A too-hard week one raises fatigue and often forces unplanned rest, which costs you far more than the modest first week ever could. I would rather an athlete feels slightly frustrated after week one, itching to do more, than satisfied and sore. That controlled restraint is what makes weeks two and three productive instead of survival exercises.
"In rugby pre-season the coaches who knew what they were doing never emptied us in the first week. They built us so we could still be standing at the end. I coach busy professionals the same way now: start a block feeling like you're holding back, and you'll have something left to give when it counts," says George Wootten, Executive Coach, THETA.
Does this apply to every block equally?
The principle holds across base, build and race blocks, though the details shift. A base block starts easy and stays relatively moderate throughout, so week one is comfortably submaximal. A build block starts easier than it will finish, but its peak weeks bite harder. Even a short race block eases in before sharpening. Training age matters too: newer athletes need a more conservative week one because their tissues adapt slower, while experienced athletes can start closer to their capacity but should still leave headroom. The constant is that week one is for absorbing the new stimulus, not attacking it.
Common questions
Why should week 1 of a training block feel easy?
Because it sets a baseline and lets your body absorb the new stimulus safely. Starting below your capacity leaves room to progress across the block and reduces the risk of early overreaching or injury.
How hard should the first week of a block be?
Aim for roughly 80–85% of your sustainable capacity, finishing sessions feeling you could have done more. Leave a couple of reps or a gear of pace in reserve on every effort.
Won't starting easy waste training time?
No. Fitness is built by accumulated sessions you recover from, not by one hard week. A too-hard start raises fatigue and often forces unplanned rest, costing more than the easy week ever would.
When does a training block get hard?
Typically in the middle, around week three of a four-week wave, which is the peak-stimulus week. Week one builds the baseline, week two adds load, week three is hardest, and week four deloads.
Does this apply to base, build and race blocks?
Yes, the principle of easing into a block applies to all of them. The absolute intensity differs. Base blocks stay moderate, build and race blocks peak harder, but each should start below its own ceiling.
Should beginners start even easier?
Yes. Newer athletes adapt more slowly at the tendon and aerobic level, so a more conservative week one protects against injury. Experienced athletes can start closer to capacity but should still leave headroom to progress.
How do I know if I started a block too hard?
Warning signs include unusual soreness, disrupted sleep and falling session quality by week two. If you feel emptied after week one rather than energised, you likely began too aggressively and have little headroom left.
Sources
- HYROX official race format (hyrox.com)
- THETA coaching data, 2024–2026
- Established principles of progressive overload and block periodisation
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