Autumn Running: How to Train for the Royal Parks Half Marathon Without Getting Injured

With the Royal Parks Half Marathon taking place on Sunday 11 October, thousands of London runners are now in the thick of their final training block. The route through Hyde Park, Kensington Gardens, St James's Park and Green Park is one of the most beautiful on the city's racing calendar, and for many runners this will be a first half marathon, a long-awaited personal best attempt, or a return to racing after a summer of building fitness.

It is also, in our experience, one of the most reliable sources of last-minute injury we see at our clinics every autumn. The combination of accumulated training fatigue, the temptation to squeeze in extra miles, and the natural anxiety of race week creates the conditions for things to go wrong precisely when it matters most. This guide is designed to help you arrive at the start line in Hyde Park healthy, confident, and ready to run your best race.

Why the Final Four Weeks Are the Highest Risk

The weeks immediately before a race are the point at which many runners undo months of sensible preparation. Modern training load research makes the picture clear: injury risk rises sharply when acute training load, meaning what you have done in the last week, runs well above your chronic load, which is your rolling four-week average. This is why a runner who has been comfortably building to 30 miles a week suddenly attempts a 40-mile week three weeks before race day and pulls up with a hamstring strain.

The final four weeks before a half marathon should not be your biggest training block. They should be a period of consolidation, gradual taper, and active injury prevention. What you do in these four weeks will not significantly increase your fitness, but it can absolutely compromise it.

Your Four-Week Injury Prevention Plan

Week 1 (10-16 September): Consolidate and Strengthen

This is your last week to run meaningful volume. Aim to complete your longest training run of this cycle early in the week, with plenty of recovery time on either side. Resist the urge to add extra sessions or increase pace.

Alongside your running, prioritise two strength sessions targeting the areas that carry most runners into difficulty: single-leg calf raises to build Achilles and calf resilience, glute bridges and single-leg deadlifts for hip stability, and lateral band walks to activate the hip abductors that protect the ITB and knee. These do not need to be lengthy sessions. Twenty focused minutes twice a week makes a meaningful difference.

If you have any niggles, address them now. A tightness in the Achilles, a grumbling knee, or a persistent hip ache that you have been running through all summer is much more manageable with three weeks of targeted treatment ahead of you than with three days.

Week 2 (17-23 September): Reduce Volume, Maintain Intensity

Begin reducing your total weekly mileage by around 20%. Keep one quality session in the week, whether that is a tempo run or some race-pace miles, but let your easy running truly be easy. Many runners make the mistake of running all their miles at a moderate effort, which accumulates fatigue without delivering fitness benefit. If you can hold a conversation throughout, the pace is right.

Continue your strength work, but reduce the load slightly. Focus on movement quality rather than pushing new personal bests in the gym. Now is also a good time to review your footwear. If your trainers have more than 400 to 500 miles on them, the cushioning will have deteriorated significantly, and race day is not the moment to discover that.

Week 3 (24-30 September): Taper Properly

Reduce mileage by a further 20 to 30% compared with Week 2. Your legs may feel heavy and flat during this period, which is completely normal and not a sign that your fitness is declining. It is your body adapting and consolidating the work of the preceding months.

Two or three comfortable runs of 30 to 45 minutes are sufficient this week. Include some short bursts at race pace to keep the legs feeling sharp without adding cumulative load. Prioritise sleep above almost everything else during this week: this is when the majority of physical adaptation and tissue repair takes place.

Week 4 (1-10 October): Race Week

Keep moving but keep it light. Two or three very short, easy runs of 20 to 30 minutes will maintain neuromuscular sharpness without adding fatigue. Avoid any new physical activities, however tempting an impromptu gym session or long walk might seem. On the two days before the race, rest completely or take a gentle 15-minute jog at most.

Prepare your kit well in advance and wear your race-day shoes for at least one of your short runs this week so there are no surprises on the day. Hydrate consistently throughout the week rather than overloading on fluids in the 24 hours before the start.

Common Injuries in the Final Training Block

Achilles Tendinopathy

Pain and stiffness in the Achilles tendon, particularly on rising in the morning, is a warning sign that should never be ignored in the final weeks before a race. Continuing to run through an irritable Achilles can escalate a manageable condition into one that forces complete rest. Physiotherapy assessment, including load management advice and targeted eccentric strengthening, can often get a runner to the start line safely when intervention happens promptly.

ITB Syndrome

Outer knee pain that develops during a run, typically around the 8 to 10 mile mark, is a classic presentation of ITB syndrome and a common complaint in half marathon runners at this time of year. Hip strengthening, soft tissue work and a temporary reduction in mileage usually resolves it effectively, but time is the critical factor.

Shin Splints

Medial tibial stress syndrome, often called shin splints, tends to appear when mileage has been increased too quickly or when running surfaces change. It responds well to load reduction and physiotherapy but can develop into a stress fracture if ignored. Any shin pain that is focal, sharp, and worsens during a run needs professional assessment before race day.

Plantar Fasciitis

Heel pain on the first steps of the morning, or after prolonged sitting, is the hallmark of plantar fasciitis. Like Achilles tendinopathy, it is a load-related condition that requires carefully managed rehabilitation rather than simply resting and hoping it improves.

When to See a Physiotherapist Before Race Day

The answer, in most cases, is sooner than you think. Many runners wait until an injury forces them off their feet before seeking help. A physiotherapy assessment in the next two weeks can identify vulnerabilities, address any current niggles, and give you a clear plan for arriving at the start line in the best possible shape.

At ProPhysiotherapy, our sports physiotherapists work with runners at all levels preparing for events across the year, including the Royal Parks Half Marathon. Whether you need treatment for a specific injury or a pre-race MOT to catch problems before they develop, we are here to help.

To book an assessment, contact our Earlsfield clinic on 020 8879 1555, our Wimbledon clinic on 020 8946 2800, or email enquiries@prophysiotherapy.co.uk. Good luck on the 11th. We will be rooting for you.