The Runner's Body: Common Problems, Prevention, and What to Do About Them
Every runner, from weekend joggers to marathoners, eventually deals with some kind of ache, twinge, or nagging pain. Most of these issues are predictable, preventable, and — if caught early — manageable without derailing your training. Here's a rundown of the most common runner problems, how to keep them from happening, and simple exercises to help.
1. Achilles Pain and Tightness
That stiff, tight feeling in the back of your ankle — especially first thing in the morning or after a run — is often the earliest warning sign your Achilles tendon is under stress.
Prevention:
• Gradually increase mileage (no more than ~10% per week)
• Warm up before speed work or hills
• Avoid sudden jumps in intensity or terrain (flat to hilly, road to trail)
• Wear shoes with adequate heel support
If you feel it:
• Cut back mileage temporarily rather than pushing through
• Ice after runs (10–15 minutes)
• Avoid sprinting and hill repeats until it settles
Simple exercise — Calf raises:
Stand on a flat surface, rise onto your toes slowly, hold for 2 seconds, lower slowly. 2–3 sets of 12–15 reps, a few times a week, builds tendon resilience.
2. Achilles Tendonitis
If tightness goes ignored, it can progress into tendonitis — inflammation with more persistent pain, swelling, or a thickened feel along the tendon.
Prevention:
• Don't ignore early tightness (see above)
• Strengthen calves and ankles consistently, not just when injured
• Replace worn-out running shoes regularly
If you feel it:
• Rest from running until pain-free walking is possible
• See a physical therapist or sports doctor if pain persists beyond 1–2 weeks
• Avoid aggressive stretching during an acute flare-up — it can aggravate things
Simple exercise — Eccentric heel drops:
Stand on a step with heels hanging off, rise up with both feet, shift weight to one leg, lower slowly past neutral. 3 sets of 10-15, done slowly, is a well-known rehab staple.
3. Runner's Knee (Patellofemoral Pain Syndrome)
A dull ache around or behind the kneecap, often worse going downhill or downstairs. It's one of the most common overuse injuries in runners.
Prevention:
• Strengthen hips and glutes (weak hips are a major contributor)
• Avoid running only on cambered or downhill routes
• Increase training load gradually
If you feel it:
• Reduce downhill running and speed work temporarily
• Ice and rest if it flares after a run
• Check your shoes and running surface for sudden changes
Simple exercise — Clamshells:
Lie on your side, knees bent, feet together, lift the top knee while keeping feet touching. 2 sets of 15 per side builds hip stability that protects the knee.
4. Shin Splints
A dull, aching pain along the shin bone, common in new runners or after a jump in mileage or intensity.
Prevention:
• Progress mileage slowly, especially if you're new to running
• Run on softer surfaces when possible
• Strengthen the lower leg muscles
If you feel it:
• Reduce mileage and avoid hard surfaces temporarily
• Ice regularly
• Persistent pain that doesn't improve with rest should be checked out (to rule out stress fractures)
5. IT Band Syndrome
A sharp pain on the outside of the knee, usually appearing a few miles into a run.
Prevention:
• Strengthen hip abductors and glutes
• Avoid always running on the same-direction cambered roads
• Don't increase mileage too fast
If you feel it:
• Shorten runs and avoid downhill sections
• Foam rolling the outer thigh can help with recovery
The Common Thread
Almost all of these injuries share the same root causes: doing too much, too soon, with too little strength to support it. The good news is that the fixes overlap too — gradual progression, consistent strength work (especially hips, glutes, and calves), and listening to your body when something feels "off" rather than pushing through pain.
A little bit of prevention — a few minutes of strength work two or three times a week — goes a long way toward keeping you on the road and off the sidelines.