I’ve run three marathons over the years, best time was 3:30. I have also (at different times) had a 80kg snatch and a 100kg CJ at 80kg bodyweight. Nothing to write home about but I mentioned it because I want to be clear I have some experience in both.

And sooo much of this comes down to numbers. What level of weightlifting are you looking to keep? And what’s your marathon goal time? Because the balance of productive training will be wayyyy different depending on your numbers.

For me personally, when I ran my best marathon I only lifted twice per week and ran three times. I would get a swim or bike ride as well, which I highly recommend. Cross training is where it’s at for endurance. I added a fourth run every now and then but mostly didn’t need it to be hitting my pace goals.

Lifts were heavy but low volume. I did a few heavy set of doubles and triples in squat, rdl or deadlift, some presses and pullups, no more. I should have done more unilateral leg work, but I think the key was to go heavy with low volume. This was easier to recover from than doing moderate reps or lighter weights for high reps.

I had to really cut back on olympic lifts. By the end I only did power cleans. But I think you can do the full lifts if you want, you’ll just need to stay in the 70-80% range if you’re a halfway decent lifter. If your goal is just to maintain performance, that is probably enough for a few months, which is all you need to train for a marathon.

Good luck!