Will be supplementing currently schedule with cross training to provide additional aerobic. stimulus. Which form is best? Pool running is not an option, but a stationary biking, elliptical, and rowing machine are.
Will be supplementing currently schedule with cross training to provide additional aerobic. stimulus. Which form is best? Pool running is not an option, but a stationary biking, elliptical, and rowing machine are.
They all provide aerobic stimuli but work on different muscles.
I would say that the one which is closer to actual running is the best. Thus:
Elliptical > Biking > Rowing
You might also consider cross-country skying if it is feasible.
What is also important is to stay motivated. Therefore, if you dislike elliptical machine, focus on biking ...