Additional Log entries for Sports

Would it  be possible include heart rate and pace information for some sports in the training log?  I realize these don't make sense for all activities listed there are several for which it does.  For example, I like to use the rowing machine from time to time.  I generally pull a set time or distance and try to hold a constant 500 m split time.  It would  be nice to track heart rate and pace / split times in the log instead of in the comments.

I think other people would find this useful for other activities like cross country skiing, etc as well.  Since it only applies to certain activities and not things people generally consider sports like soccer, racquetball, etc, would it make sense to have and "cross training" or "alternate cardio" section where you could log additional information like heart rate, pace, distance?