What to do when you miss a week of training (and what not to do)

You got sick. Or you travelled. Or work ate every evening and the weekend disappeared. Either way, you've missed a week of training and you're now doing the thing everyone does: catastrophising about lost progress while also feeling too guilty to walk back in.

Here's the honest picture of what a missed week costs, and the way back that doesn't cost you a second one.

What you actually lost

Far less than it feels like.

• ›Strength: essentially nothing after one week. You might feel a little rusty in the first session back. The strength is still there.
• ›Aerobic fitness: a small dip that comes back within a couple of sessions. Noticeable if you're highly trained, barely detectable if you're not.
• ›Muscle: none in a week. Any change on the scale is water and food, not tissue.
• ›The habit: this is the real thing at risk. Not because a week broke it, but because of what people do next.

Fitness is built over months and lost over months. A week is a rounding error. The damage from a missed week is almost entirely psychological, which means it's almost entirely preventable.

What not to do

Don't make it up. The missed sessions are gone. Trying to fit last week's work into this week doubles the load on a body that just had a week off. This is how a missed week becomes a tweaked back and a missed month.

Don't punish yourself. Coming back with the hardest session you can imagine, to "earn" your way back, feels righteous and achieves nothing except making the next session harder to start.

Don't wait for Monday. Or the first of the month. Or until you "feel ready". Every day you wait, the story that you've "fallen off" gets stronger. The best day to come back is tomorrow. The second-best is today.

Don't start over. If you were on week seven of a plan, you are not back on week one. You're on week eight, slightly rusty.

What to do instead

Come back at about seventy percent. Same exercises, same structure, lighter weights, fewer sets, shorter run. The goal of the first session back is to remind your body what it does, not to test it. You'll feel almost normal by the second session and fully normal by the third.

Drop one hard thing, keep the rest. If your plan had four sessions this week and you're coming back mid-week, do the two or three that fit. Prioritise the one that matters most for your goal and let the others go without ceremony.

Restart the count, not the plan. If you use something like the two-day rule, today is day one of not missing two in a row. That's the only reset that matters.

Pick up the plan where it is now. If you were building toward a date, the block just got a week shorter. That's fine. A good plan absorbs it. See periodization for normal people for why that works.

If you were sick

Coming back from illness is different from coming back from travel. Your body was already under load. A useful rule: for every day you had symptoms, take about a day of easy training before going hard again. Fever means no training until it's fully gone, then easy first. Chest symptoms, be extra cautious. A week of easy sessions after a proper illness is not lost time. It's the fastest route back to full training.

If it's been more than a week

Two weeks: same advice, first session at sixty percent, give it a full week before hard work. A month or more: you've lost some fitness now, but you haven't lost the knowledge or the habit skeleton. Start at roughly where you were two or three months before you stopped, and you'll climb back faster than the first time, because your body has been there before.

Where the plan should meet you

The right response to a missed week is a decision: what to keep, what to drop, how much to pull back. Making that decision while feeling guilty is how people get it wrong in both directions. This is one of the things a coach is for, and it's built into exrsz: miss a week, and the plan reshuffles what's left, lightens the first session back, and moves on without comment. No streak broken, no punishment session, no starting over.

Whether you use an app or a notebook, the principle is the same. The week is gone. Tomorrow isn't. Go do a slightly easier version of what you'd normally do, and the whole thing is behind you by Thursday.