How much
How many days should a runner strength train?
Two sessions a week is the answer for most runners. Three works when your running volume is moderate and you recover well. One is worth far more than none, and four is almost always the number that starts costing you runs.
Free plan builder
Generate my running + strength week.
| Mon | Easy run | Conversational pace |
|---|---|---|
| Tue | Upper body | Push and pull, barely interferes with running |
| Wed | Tempo run | 20–30 min at a comfortably hard pace |
| Thu | Rest | Recovery is part of the plan |
| Fri | Lower body | Squats, hinges, single leg, placed away from your hard run |
| Sat | Rest | Recovery is part of the plan |
| Sun | Long run | The session the race depends on |
Why this week is shaped like this
- The long run is protected from accumulated lower-body fatigue, nothing heavy lands the day before it.
- Strength is distributed across the week rather than clustered around key runs: lower body sits furthest from your hard days, and upper body takes the awkward slot because it interferes least.
- Quality running is separated from lower-body strength where possible, and kept clear of the long run so neither arrives tired.
- Rest days are part of the plan, not the days you failed to train.
Weeks 2 to 12
Week 1 is above. The rest is the part that makes it a plan.
Want this to adapt every week?
The week above is a fixed template, a good one, but it repeats forever. What FitBoost adds is everything after it: volume that grows from what you actually absorbed rather than a flat percentage, a long run that stays the longest run, deloads triggered by accumulated load instead of the calendar, and strength that moves when a run turns out harder than planned.
Those numbers are different for every runner, which is why they are not on this page.
Part of our guide to Strength training for female runners .
Two days a week. Three if your running volume is moderate and you recover well; one if your week is full. More strength does not make a better runner.
Why two
Two sessions is enough to keep building and to hold what you have built, and it leaves the rest of the week for running. The limiting resource is not motivation: it is recovery, and running is already spending most of it. Which exercises to put in those sessions is covered in strength training for female runners.
The runners who stall on strength are rarely doing too little. They are doing three or four sessions on top of a running week, arriving at every run slightly cooked, and concluding that strength training makes them slower.
The 2-day layout
One lower body, one upper body. Lower body goes as far from your hard run and your long run as the week allows; upper body takes the awkward slot next to one of them, because it can.
- Mon, lower body
- Fri, upper body
- Hard run midweek, long run at the weekend
The 3-day layout
Add a second lower-body day only if your running volume is moderate. If you are building mileage, make the third session upper body or full body instead.
- Mon, lower body
- Wed, upper body
- Fri, full body, lighter
When to drop to one
Race week, a heavy build phase, or a week where life took the days. One well-placed full-body session holds nearly everything; zero for a month does not.
Dropping to one deliberately is a plan. Missing two accidentally is how people stop.
Questions
Is a 3 day strength plan too much for a runner?+
Not if your running volume is moderate and one of the three is upper body or lighter full body. It is too much when you are also building mileage.
Can I strength train every day?+
Not usefully alongside running. You would be spending the recovery your runs need on sessions that give diminishing returns.
What if I can only do one day?+
Make it full body, with a squat pattern, a hinge, single-leg work and calves. One consistent session beats three you keep missing.
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How FitBoost builds these schedules
The placement rules on this page are the ones the app applies: hard sessions spaced apart, heavy lower body kept away from the key run, upper body used as the session that interferes least, and rest planned rather than left over. In the app they run against your own history, what you completed, what you skipped and what you reported as too hard, rather than against a template.
We do not claim a clinical review of this page. It is training guidance, not medical advice, and anything involving pain, injury, pregnancy or the postpartum period belongs with a professional who can assess you. FitBoost has no postpartum programme today.
Last reviewed: August 2026