Parkrun Every Week: Managing Load for Lifelong Running

There is something quietly brilliant about a Saturday morning 5k. It is free, it is social, it is timed, and it gets thousands of people across Liverpool and Merseyside out into the parks at nine o'clock on a weekend when they could reasonably be in bed. As a physiotherapist I am unambiguously in favour of it.

I am rather less in favour of what a lot of people do with it, which is to run one hard 5k every week, all year, at the same pace, with no strength work, no easy weeks and a quiet determination to beat last Saturday's time. That is not a training programme. That is a weekly time trial, and time trials have a habit of finding your weakest tissue.

Here is my parkrun injury advice for people who want to still be doing this in twenty years.

The injuries I see most in weekly 5k runners

Patellofemoral pain, or runner's knee. Vague ache around or behind the kneecap, worse on stairs and after sitting. Far and away the most common. There is more detail on my knee pain page.

Achilles tendinopathy. Stiff, sore tendon first thing in the morning that warms up during the run and then hurts more afterwards. Classic in runners who added speed work or hills.

Plantar heel pain. Sharp pain under the heel on the first steps out of bed. Miserable, common, and very treatable.

Shin pain, or medial tibial stress syndrome. Diffuse ache along the inside edge of the shin. Usually a load problem, occasionally the early edge of a bone stress injury, which is why localised, pinpoint shin pain deserves proper attention rather than being run through.

Gluteal and hamstring tendon pain. Deep buttock ache that hurts on sitting and on hills.

The unifying theme is not bad technique or bad shoes. It is load: how much, how hard, how suddenly, and how much capacity the tissue had to absorb it.

Why a weekly 5k causes problems

Every run is a race. Running the same distance flat out every week gives your body one stimulus and one stress pattern, repeated. There is no easy day for tissue to recover into.

The stopwatch drives the decision. A course, a clock and a results table create pressure to push on days when your body would have chosen otherwise. Broken sleep, a bad week at work, a heavy Friday shift, and you still line up and empty the tank.

Nothing else is in the programme. Most weekly runners do no strength training at all, and research consistently supports resistance training as one of the most effective ways to reduce running injuries.

Volume arrives in a lump. Someone runs 5k a week for a year, decides to enter a half marathon, and triples their weekly mileage in a fortnight. That jump, not the running itself, is what breaks things.

How to manage the load properly

Vary the effort. Race the clock roughly once a month. Run the other Saturdays comfortably, at a pace where you could hold a conversation. Volunteering occasionally is not a lesser week; it is a rest week with a hi-vis vest.

Build gradually. Increase your weekly mileage in modest steps and hold each step for a couple of weeks before the next. Alternate harder and easier weeks. Nobody has ever been injured by increasing too slowly.

Strength train twice a week. Twenty to thirty minutes. Calf raises, both straight-knee and bent-knee, progressed to single leg and loaded. Split squats. Romanian deadlifts or hip hinges. Single-leg bridges. Heavy enough to be hard by the last few repetitions. This is the highest-value thing most runners are not doing.

Add some faster running deliberately, in small doses. Strides, short hill repetitions, a few 30-second efforts. Introducing speed on purpose, gradually, is safer than only ever meeting it at full tilt on race day.

Respect the season. Autumn in Merseyside means dark mornings, wet grass and churned-up courses. Grip changes, footing changes and effort at a given pace changes. Slowing down a little on a mud-heavy October morning is sensible, not soft.

Look at your shoes honestly. Comfort matters more than category, and worn-out midsoles matter more than either. If a pair has done many hundreds of miles and your legs have started aching, that is worth checking. But shoes are not a substitute for strength.

Aches versus injuries

Not every twinge needs a physiotherapist. A useful rule of thumb: mild discomfort that stays below a level you would call painful, does not make you limp or alter your gait, does not get worse during the run and has settled by the next morning is usually fine to continue with while you address the cause.

Stop and get it assessed if pain makes you change how you run, gets progressively worse during a run, is present the following morning, or keeps returning at the same distance each time.

Red flags: stop and see a doctor

• Sharp, pinpoint pain over a bone, particularly the shin, foot or hip, that worsens with impact or is present at night. Bone stress injuries need diagnosing, not running through, and are more likely in runners with low energy availability, irregular or absent periods, or a history of stress fractures.
• Calf pain with swelling, warmth or redness, which needs same-day medical assessment.
• Chest pain, unusual breathlessness, dizziness or fainting during exercise. Call 999 for chest pain.
• Any injury where you cannot weight bear.

Running for decades, not seasons

The runners I see still going strong in their sixties and seventies have a few things in common. They rarely chase a personal best every week. They lift something twice a week. They take a genuinely easy week when they feel flat. They deal with niggles at week two rather than month four. And they treat consistency across years as the goal rather than a single fast Saturday.

If something has been grumbling for more than two or three weeks, get it looked at while it is still small. Most running injuries I see across Liverpool are eminently fixable, and the ones that take months to sort are usually the ones that were ignored for months first. You can read more about sports injury rehabilitation and about how I treat sports injuries in Liverpool.

Home visits across Liverpool and Merseyside are £90 a session, online video consultations UK-wide are £60, evenings Monday to Friday, plus Saturday and Sunday daytimes, no GP referral needed. Book at /portal/book or call me on +44 7553 370300, and I will happily work around a Saturday morning.