I do jiu jitsu and kickboxing on Wednesday and Sundays, they include high intensity workouts like the Tabata with weights and without, we keep it up for at least and hour, with split half way for 5 mins. Then we roll for an hour (I think rolling with other guys is much more intense than any other workout)
For the rest of the week, I do weight lifting for an hour or two.
They guys I roll with are about 50 to 70 pounds heavier than me and they say I have ridiculous strength for my size (5 8" 156 pounds) and I notice a stamina increase in my weight lifting workout.
But some of you guys don't have the opprtunities I do.
I think
@Mike should go to a sports retailer and find some of those elastic bungee thingies that he can hook to his truck or trailer and design himself a workout routine for strength training