This is the time of year the autumn training blocks quietly begin. Plans get printed, long runs get pencilled into the calendar, and every mile gets a home. And almost always, one thing gets left off, or scribbled in the margin as "if I have time": the strength work. It's the first thing dropped and the last thing missed, right up until something starts to hurt.

So here's the case for treating the gym as part of your running, not a chore alongside it. Because it isn't cross-training, and it isn't extra. It's running training with the running taken out.

What strength actually does for your running

Every stride you take is a small single-leg jump: you land, absorb the impact, and repel off the ground, thousands of times a run. Strength work is where you build the thing that does the jumping. When you get stronger, three things change, and all three matter.

First, you put more force into the ground with each stride, so the same pace costs you less. Coaches call this running economy, and the research on it is unusually clear: runners who lift become more efficient, which means you can hold a given pace for longer, or the same effort simply carries you faster.

Second, your tendons, ligaments and bones learn to tolerate load. This is the durability half of the equation, and it's the one people feel most. A stronger, better-conditioned runner is a harder runner to injure, because the tissues that usually give way have been asked to handle load in a controlled setting rather than only under the repetitive pounding of a run.

Third, your form holds together when you're tired. The wheels tend to come off late in a run or a race, when fatigue creeps in and technique frays. Strength buys you a body that keeps its shape under fatigue, which is exactly when injuries and slow miles both like to arrive.

It's not about how heavy

Here's where a lot of runners talk themselves out of it, picturing a barbell they can barely move. That picture is wrong. Strength training for runners isn't about how heavy you go. It's about controlling the movement.

This is how I coach it, and it's a deliberate choice. I don't dictate the exact weight, because you know what's genuinely heavy for your body better than anyone watching does. You pick a load you can move well, under full control, on the way down just as much as the way up. That control, the time the muscle spends working through the whole range, is the stimulus. The weight is only the tool that creates it. Chase control over ego and you get stronger without turning every session into a max-effort grind.

How to actually do it

You don't need a bodybuilder's schedule or a wall of machines. A few principles cover almost everyone.

Two sessions a week is plenty

Genuinely. Two focused half-hours does the job for the vast majority of runners. This is a small, repeatable habit, not a second sport.

Big movements, not fiddly ones

Squats, hinges, lunges, step-ups, calf raises. Favour the movements that use whole chains of muscle over machines that isolate one small part. You want to train the patterns running actually uses.

Go single-leg

Running is a single-leg sport, so train it that way. Single-leg work exposes the side-to-side imbalances that quietly slow you down and set up injuries, and it carries over to your stride more directly than anything done on two feet.

Control it, don't just heave it

Move the weight slowly and deliberately, especially as you lower it. Pick a load you can own with good form, not one you can barely survive. If your technique falls apart, the weight is too heavy, whatever the number says.

Keep it off your hard days

Lift on easy days, or on their own day, rather than stacking it right before a key running session. And don't fear strength work near easy runs: running a little tired-legged the day after lifting is completely normal and nothing to avoid.

Let consistency do the work

This pays off over months, not weeks. Two ordinary sessions every week across a season will always beat one heroic session you never repeat. Boring and regular wins.

The short version

  • It's not extra, it's training. Strength is running training done standing still.
  • It makes you faster and more durable. Better economy, tougher tissues, form that holds when tired.
  • Control beats load. Move a manageable weight well; the control is the stimulus, not the kilos.
  • Two sessions a week. Big, single-leg movements, kept off your hard days.
  • Consistency wins. Months of ordinary sessions beat one heroic one.

The miles get all the attention, and they should: they're the sport. But the miles only hold up if there's a chassis underneath them that can take the pounding. Strength training is how you build that chassis. I used to think of it as a separate thing I did for my running. What I learnt is that it is my running, just done standing still. Build the chassis now, while the block is young, and the runner who reaches the start line in the autumn will be a sturdier, faster one.

This article is general information, not coaching or medical advice. If you're new to strength training, carrying an injury, or unsure about your technique, get guidance from a qualified coach or physio before loading up.