[Max Krause]

Hi, I’m not the expert here and someone else may have much more perspective.

I think it may be a good idea to not think of just adding more sessions to make progress. You can only handle so much work. So even if you have free time to fill just adding more work isn’t going to lead to progress.

If you think you’ll get a benefit from doing speed work but your legs are always tired then you may want to replace one or two sessions with the speedwork. And I personally definitely wouldn’t do it on my long runs, they have enough impact by themselves.