Marathon Training Tips — by Cormac Henry, Product & Operations Lead at Eos Elite
Training for a marathon is one of the most rewarding challenges you can take on as a runner. It tests not just your physical endurance, but your discipline, patience, and mindset. Whether it’s your first marathon or your fifth, the fundamentals remain the same, and getting them right will make all the difference on race day.
The first thing I always tell runners is simple: give yourself enough time. A proper marathon build should take anywhere from 12 to 16 weeks, depending on your current fitness level. Rushing into a plan without a solid base is one of the quickest ways to end up injured or burnt out. The goal is to arrive at the start line feeling confident, not just having survived the training.
Consistency is where real progress happens. It’s easy to get caught up in the idea of pushing yourself with big sessions, but occasional heroic efforts won’t replace steady, regular training. Showing up week after week, even when motivation dips, is what builds endurance and resilience.
That said, consistency doesn’t mean doing the same thing every day. Variety in your training is key. Long runs will build your aerobic base and mental stamina, intervals will improve your speed and efficiency, and tempo runs help you get comfortable at sustained effort. Mixing these elements not only develops you as a runner but also keeps training engaging, which is half the battle over a long block.
It’s also important to remember that training doesn’t stop when the run ends. What you do off the road matters just as much. Prioritising sleep and fuelling your body properly will directly impact how well you recover and perform. Food is fuel, and treating it that way can be the difference between feeling strong or constantly fatigued.
Marathon training can be tough, especially during the longer weeks when fatigue builds. That’s where running with others can make a huge difference. Whether it’s a friend, a family member, or a local run club, having company can lift your energy and keep you accountable when motivation is low.
As your mileage increases, discipline becomes even more important. A good rule of thumb is to increase your weekly distance by no more than 10%. It might feel slow at times, but this gradual progression is crucial for avoiding injuries that come from doing too much too soon.
And finally, don’t forget to enjoy it. It might sound simple, but smiling genuinely makes a difference. It relaxes the body, lifts your mood, and reminds you why you started in the first place. Marathon training is demanding, but it should also be something you’re proud of and, at times, even enjoy.
Get the basics right, stay consistent, and trust the process. The finish line will take care of itself.
