Pre-season workout advice

[lrichels]

I am 61 years old and attempted to get back into officiating Bloomington Athletic Assoc games (6-10 grades) last winter--5-6 games a week (sometimes 3 games a night). I found out that my elliptical trainer workouts did not prepare me for the running, turning and stops and starts of officiating. Thus after one month I had to quit due to muscle issues throughout my legs.
Can anyone give me some advice on a workout regimen to prepare for another attempt at officiating this fall and winter?

Larry