No single marathon training plan is best for every runner. Higher weekly mileage and longer long runs were linked to faster finishes, while abrupt workload increases—not mileage alone—were linked to more injuries. A marathon plan organizes running volume, long runs, and supporting exercise before race day. The useful comparison is therefore not "easy versus hard," but manageable training versus more work than the body has recently handled.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- How does weekly mileage compare?
- How important is the long run?
- What raises injury risk?
- Does strength training change the comparison?
- Balancing health benefits with training effort
How does weekly mileage compare?
higher-volume plans may support faster marathon times, but the evidence is observational. In an Erasmus MC cohort of 441 recreational runners, those averaging more than 65 kilometers weekly finished 14.09 minutes faster than the reference group. Those averaging less than 40 kilometers finished 6.33 minutes slower, according to the 2020 Erasmus MC study.
That finding does not prove that adding mileage will produce the same improvement for every runner. Faster runners may tolerate more training, have more experience, or differ in other ways the study could not fully separate. The practical tradeoff is straightforward:.
- Under 40 kilometers weekly requires less running volume but was associated with slower finishes in this cohort.
- Between 40 and 65 kilometers offers a middle ground, although the study does not identify it as an ideal range.
- More than 65 kilometers demands greater volume and was associated with faster finishes, not guaranteed improvement.
How important is the long run?
The long run appears relevant to performance. In the same Erasmus MC cohort, a longest training run below 25 kilometers predicted a marathon finish 13.44 minutes slower. This does not establish a precise minimum that every runner must exceed.
It also does not show that progressively longer runs always produce better results. The finding supports preparing for sustained running, but it cannot define the safest or most effective distance for an individual. Weekly mileage and the longest run were not associated with reported injuries in that study. That distinction matters: total distance alone may be less informative than how quickly a runner reaches it.
What raises injury risk?
Marathon preparation carries a substantial injury burden. Among 735 new York City Marathon trainees followed for 16 weeks, 40.0% reported a training injury and 16.0% reported an injury during or immediately after the race, according to the Hospital for Special Surgery and Weill Cornell Medicine cohort. Injury odds increased when runners had more training days with an acute-to-chronic workload ratio of at least 1.5. This ratio compares recent workload with the workload the runner had become accustomed to over a longer period.
In plain language, repeated mileage spikes were the warning signal. First-time runners may face additional uncertainty. In another cohort, 9.5% sustained a major injury that prevented starting or finishing, while 49.2% reported a minor injury affecting training or performance. Previous half-marathon completion was associated with lower injury odds, though that relationship does not prove the half-marathon itself prevented injuries.
Does strength training change the comparison?
Strength work adds training effort, but one tested routine did not improve the measured marathon outcomes. In a randomized trial of 720 first-time runners, a self-directed routine performed three times weekly for 12 weeks did not significantly reduce overuse injuries preventing completion. Rates were 7.1% with the routine and 7.3% without it, and finishing times did not improve, according to the Hospital for Special Surgery trial.
This result applies to that specific self-directed program. It does not establish that every strength routine is ineffective, but it does challenge the assumption that adding generic exercises automatically makes marathon training safer or faster. Treat strength sessions as additional workload rather than free protection. A runner deciding between more running and extra supporting exercise should not assume either choice guarantees injury prevention.
Balancing health benefits with training effort
Marathon preparation may improve important health measures. A small eight-month marathon-school study found lower final blood pressure, reduced body fat, and higher VO₂max among 45 trainees compared with 43 controls. Because the study was nonrandomized and small, it cannot show that training alone caused every difference.
The American Heart Association concludes that regular moderate-to-vigorous activity benefits most people more than it harms them. It also advises sedentary people to build gradually before vigorous endurance exercise because unaccustomed hard activity can temporarily increase cardiac-event risk, as outlined in its exercise and cardiovascular-events guidance. Choose the workload you can increase without repeated spikes. A lower-volume plan may sacrifice some expected speed, while a higher-volume plan only makes sense when the added distance represents a gradual progression from recent training.
