Training plan details (2-a-days)

I am following one of the SYSTM plans and there are two (2) workouts listed on some days. Does that mean do both workouts or choose one of the two? Thanks

Do both. If there’s an order, there’s usually coach notes to say which, but otherwise your choice.

Do noth, and if possible, close together. Ten minute breaks should be long enough.

Thanks! I’ve been doing both up until now but I saw one coming up with two 1:30.00 workouts and thought I may be doing something wrong.