How to Train for a Marathon for Beginners: 16 Week Plan

Alright everyone, I'm finally biting the bullet and aiming for my first marathon this summer. I've found a basic 16-week plan that starts with 3-mile runs and builds up, but I'm worried about the jump in mileage around week 10. For those who have finished one, is 16 weeks actually enough for a total novice, or should I bake in some extra time for potential injuries?

16 weeks is pretty much the gold standard for a training block! I used a similar shout for the London Marathon last year. My advice? Don't obsess over the pace in those early weeks; just focus on time on feet. If you feel a niggle, rest immediately—it's better to miss two days than two weeks.

I'm in the middle of a 16-week cycle right now for Vancouver! The biggest thing I've noticed is that the "long run" on Sundays is the only non-negotiable part. Even if your weekday runs are a bit shorter because of work, make sure you hit those double-digit miles on the weekend to build that aerobic base.

Totally agree with MapleLeafFan. I'm down in Austin and the heat usually kills my pace, but as long as I get the distance in, I feel prepared. MidwestMike, what's your current weekly mileage? If you're starting from zero, 16 weeks might be a bit tight.

I'm doing about 10-12 miles a week right now, mostly 5ks after work. TXguy99, do you think I should do a "pre-plan" month just to get used to running 4 days a week?

Hi Mike! Honestly, if you're already doing 12 miles a week, 16 weeks is plenty. Just make sure you've got decent trainers. I made the mistake of training in old gym shoes and ended up with shin splints by week 6. Get a gait analysis done at a proper running shop!

Spot on, NorthernLass. Proper kit is essential. Also, Mike, look into "Jeffing" (run-walk method). It sounds like cheating to some, but it’s a brilliant way to manage load for your first go at 26.2 miles.

Checking in from the West Coast! Quick tip: don't forget the strength training. Even just 20 mins of lunges and planks twice a week will save your knees when you hit those 15+ mile runs in month three.

Thanks VancouverDave, I hadn't even thought about strength work. I figured I'd be too tired from all the running!

It’s a common trap! You don’t need to be a bodybuilder, but a strong core keeps your form from falling apart when you're exhausted at mile 20.

Does anyone have thoughts on nutrition for the 16-week block? I'm struggling with what to eat before the long Saturday runs. Everything seems to sit heavy in my stomach.

Porridge (or oatmeal as our US friends say!) with a bit of honey about 2 hours before is my go-to. It’s light but gives you that slow-release energy.

I second the porridge. And start practicing with gels early! Don't wait until race day to find out your stomach hates a specific brand of glucose.

Exactly. "Nothing new on race day" is the golden rule.

This is all incredibly helpful. One more thing—my plan has a 3-week "taper" at the end where mileage drops significantly. It feels like I'll lose my fitness right before the race. Is that normal?

Aha, the "taper tantrums"! You won't lose fitness, Mike. Your muscles are just finally getting a chance to repair the micro-tears from the last 13 weeks. You'll feel like a coiled spring by the time you reach the start line.

Trust the process. The taper is where the magic happens!