Most running injuries are not bad luck. They build quietly, usually when training ramps up faster than your body can adapt, and they often return for the same reason. If a niggle keeps pulling you out of training, sports physiotherapy is less about treating the sore spot and more about finding why that spot keeps taking the strain. Rest lets the tissue settle, but it does not change the training jump, the weak link, or the habit that caused the problem. That is why so many runners feel fine after a week off, then break down again at the same distance.
Three questions usually get to the heart of it: how much did your training change before the pain started, which part of your leg is doing more than its share, and how do you build back without tipping over again? This article works through each one, with a simple way to read your own pain on a run.
Jolene signed up for her first half marathon in March. She is thirty-six, works in marketing, and runs three mornings a week along the bay before the office. Around week six, a dull ache appeared on the outside of her right knee. It only showed up on long runs, so she ignored it. A fortnight later, it arrived earlier in every run and followed her up the stairs at work.
She took a week off and the knee settled. On her first long run back, the ache returned at almost the same point, a little past eight kilometres. Looking back at her training log, she noticed something she had missed. She had added two kilometres to her long run every weekend and switched to a hillier route that same month.
The knee was where it hurt. The training was where it started.
Why do running injuries keep coming back?
Usually because the cause is still there. Tissue heals with rest, but if the training load or movement pattern that overloaded it has not changed, the strain returns as soon as you build back to where the trouble began. Pain that reappears at the same distance or pace is a strong clue that load, not bad luck, is the issue.
Running injuries are common. One review of long-distance runners found that many are injured over the course of a year, with the knee most often affected. Most are overuse injuries, meaning nothing usually goes wrong in a single moment. It helps to think of every tissue as having a capacity. Training challenges that capacity, and recovery rebuilds it a little stronger. Trouble starts when the challenge keeps outpacing the recovery: a jump in distance, a new hilly route, a faster group, a week of poor sleep, or the extra strain of running in Singapore's heat and humidity. None of these is a problem on its own. Stacked together, they often are.
Should you rest or run through the pain?
Often neither. Complete rest calms the tissue but leaves it less conditioned and doesn't address the cause, while running through sharp or worsening pain usually makes it worse. For many overuse injuries, the middle path works better: keep moving at a level the tissue tolerates, then build back gradually. The useful skill is reading how your pain behaves, not just whether it is there. Research on tendon injuries found that people who kept training within set pain limits did as well as those who stopped, and physiotherapists often use a similar guide with runners:
A simple way to read your pain
Mild discomfort that stays low during a run and has settled by the next morning is often acceptable.
Pain that climbs as you run, changes how you move, or worsens the next day signals you to ease off.
Sharp or sudden pain, swelling, or pain at night is a reason to stop and have it checked.
On the training side, reviews suggest that sharp increases in load, doing too much too soon, are linked with running injuries, although the picture differs from person to person. The practical lesson is steadiness. Change one thing at a time, whether distance, pace, or terrain, and give your body a few weeks to catch up before changing the next.
What does sports injury physiotherapy involve?
A good assessment looks beyond the sore spot. It asks how your training has changed, watches how you run, squat, and balance on one leg, and tests the strength of the muscles that share the load. The plan that follows usually combines settling the painful area, targeted strengthening, and a graded return to running.
Strength deserves particular attention because most runners skip it. Research shows that structured strength training can meaningfully reduce the risk of overuse injuries, likely because stronger muscles and tendons absorb load better and tire more slowly. For runners, that often means the calves, hips, and thighs, which absorb several times your body weight with every stride.
The return to running is built in stages, with each step guided by how your body responds rather than the calendar. For someone like Jolene, that might mean checking her hip strength and how her knee tracks on a single-leg squat, holding her long run steady for a few weeks, and bringing the hills back once the knee has settled. Outcomes vary from person to person, but the aim stays the same: a body that can handle the running you want to do.
Common questions from runners
Q: Is the 10 per cent rule worth following?
A: It is a reasonable rule of thumb, not a law. Adding around a tenth to your weekly distance keeps changes gradual, but research has not found one safe percentage that suits everyone. What matters more is avoiding big jumps and changing one thing at a time.
Q: Can I keep exercising while I am injured?
A: Usually, and it often helps. Cycling, swimming, or strength work can maintain your fitness while the injured area settles, as long as they don't provoke pain. Staying active also keeps the surrounding muscles and tendons conditioned, which tends to make the return to running smoother. Choose activities that load the injured area less, and notice how it feels the next day.
Q: How soon can I return to running?
A: That depends on the injury, your history, and how you respond, so no one should promise a fixed date. A graded return that rebuilds load step by step, based on how the tissue copes, tends to hold. Rushing back is one of the most common reasons an injury returns.
When is it worth getting a running injury checked?
Worth an assessment
A niggle that keeps returning at the same point in your runs.
Pain that changes the way you run.
An injury that has already come back more than once.
Pain that lingers into the next day or into daily life.
About BalanceCore
BalanceCore Physiotherapy & Wellness treats chronic and complex pain, scoliosis and posture, women's health, sports and running injuries, clinical Pilates, and foot care. Michael Yan, physiotherapist at BalanceCore in Marina One, developed the BalanceCore Method, which the whole BalanceCore team practises. Michael grew up in China with a grounding in Traditional Chinese Medicine philosophy, and holds a Master's degree in Musculoskeletal and Sports Physiotherapy from the University of South Australia. He has more than 27 years of clinical experience across a wide range of musculoskeletal conditions, and has been invited to teach fellow physiotherapists in Singapore, China, and Indonesia.
If an injury keeps bringing you back to the same point in your training, it is worth understanding why before you build back up. An assessment looks at your training, how you move, and where the load is concentrating, then shapes a return plan around what it finds. To learn more about sports injury physiotherapy in Singapore, you can book an assessment with BalanceCore at Marina One, a short walk from the bay.
References
van Gent R.N. et al., Incidence and determinants of lower extremity running injuries in long distance runners: a systematic review. BJSM, 2007. bjsm.bmj.com
Nielsen R.O. et al., Is there evidence for an association between changes in training load and running-related injuries? A systematic review. IJSPT, 2018. pubmed.ncbi.nlm.nih.gov
Silbernagel K.G. et al., Continued sports activity, using a pain-monitoring model, during rehabilitation in patients with Achilles tendinopathy. American Journal of Sports Medicine, 2007. pedro.org.au
Lauersen J.B. et al., The effectiveness of exercise interventions to prevent sports injuries: a systematic review and meta-analysis. BJSM, 2014. bjsm.bmj.com
HealthXchange (SingHealth), Overheating During Exercise: Risk Factors and Symptoms. healthxchange.sg
Health Promotion Board and Sport Singapore, Singapore Physical Activity Guidelines. healthhub.sg
