Marathon High Volume Plan and modification in Threshold HR

Technical Support
1

Hi! I am currently training for a Marathon on 21st Sep, 2025. I had setup my plan for run with 3 swim sessions over the weekened. But, I haven’t been able to use the pool due to adverse (thunder-storms) weather conditions in my location on most weekends. I visited the “Training” section under “Settings” and made two changes; (1) Removed the 3 swims, and (2) Set the ramp-up to “Fast”. Now Athletica has re-worked my plan to introduce a “Marathon High Volume Test Week” next week. How do I view this? This is barely 7 weeks before race-day. Now training mileage in kms looks like this: 49(test week) → 68 → 82 -->46 -->77 → 56(taper 1) → 44 (taper 2). I am not certain if that’s sufficient weekly mileage. Also the longest run is only 21 kms on just one week and about 11 kms for rest of the weeks. Are the weekly swings in mileage also fair?

Also, earlier this week, Athletica modified my HR Threshold from 148bpm to 160bpm and also slowed all my paces. For context, since June I have been training in hot and humid weather (26 to 31 degrees Celsius with 75%-94% humidity), and hence my HR remains elevated at relatively lower paces. Could that have had an impact?

2

When you reset or form a plan at close proximity, its usually wise to click the box that says ‘skip test week’

3

Yes - revert to your former thresholds. You can change this from the Overview tab in Zones - change and click ‘update’

4

It did not give me that option, like it has done in the past. What should be the steps now? Also, the weekly long runs is too short and also the weekly mileage is fluctuating.