Adaptive · New

A Marathon plan that ends
on your 42K race day

Set your race date. We generate a plan of 14 to 26 weeks that ends exactly on race day — with the last week tapered. No gaps. No improvising. For experienced runners.

14-26

Adaptive weeks

4×

Sessions / week

Ends on race day

Download the app free

Pick your race date inside the app

Who this plan is for

Experienced runner: you have completed at least one half marathon
4 running days per week: 5-7 hours of running, plus optional cross-training
You can do long runs: 2-3 hours on weekends in the peak phase
Time-disciplined: a 42K demands sustained commitment over months

What the plan includes

Phase	Weeks	Content
Base	1-5	Aerobic base building. Long runs 14-22 km. Easy mileage progression.
Build	6-10	Intervals, hill repeats, sustained tempo. Long runs to 26 km.
Specific	11-15	Marathon-pace blocks within long runs. Long runs to 30-32 km.
Peak	16-17	Highest training load. Final sharpening before taper.
Taper	18 (last)	Progressive 50% volume reduction. Short race-pace activations. Fueling practice.

Sample week (week 13)

MondayRest

Tuesday60 min easy + 8x100m strides

WednesdayRest or strength/core

Thursday6x1 km at marathon pace + 3 km tempo

FridayRest or 30 min very easy

Saturday50 min easy run

Sunday28 km long run with 10 km at marathon pace

Why train with CorrerJuntos

📡

Real-time GPS & metrics

Track splits, pace and distance for every interval session and long run.

🤝

Runner community

Find training partners for intervals and shared race goals.

Group runs near you

Join training meetups and Marathon (42K) runs happening in your city.

🎁

100% free

GPS, training plans, community. All free.

Frequently asked questions

How much can I improve my Marathon (42K) time?

With a structured plan, most runners improve their Marathon (42K) time meaningfully. The exact gain depends on your starting fitness, consistency, and adherence to the plan.

How does the adaptive duration work?

You set your race date and the plan generates between 6 and 18 weeks of training, ending exactly on race day with the last week tapered. If your race is too close (under 14 weeks for a Marathon (42K)), the app suggests a shorter distance instead.

How many days per week?

The plan is built around 4 running days per week, with optional strength or cross-training. Rest days are essential for recovery and adaptation.

Can I combine this with strength training?

Yes, and we recommend it. Add 1-2 strength sessions per week, ideally after an easy run or on rest days. Focus on legs and core. Avoid lifting before quality sessions.

Where do I access the plan?

The plan lives inside the CorrerJuntos app. Download it free on App Store or Google Play, create your profile and go to Training Plans to activate the Marathon (42K) plan.

Start your free plan

Train smart for your Marathon (42K) with an adaptive plan that ends on your race day. Thousands of runners already train with CorrerJuntos.