Why is number of intervals limited to 40 repeats?
Hard to say. Maybe some limit in the watches. You can put a repeat in a repeat to get 1600 repeats which would be enough for most people :-)
yes I figured, so obviously not a memory limit.But I want my workout to display for instance 1/100 intervals, 2/100 and so forth. 40 is not even enough for a marathon of 1 x km 42.40 is such an unnecessary limit
