Back 40 years ago in 11 man we started every practice running 2 miles which took less than 15 min to increase endurance in big games. Being a little tired better showed weaknesses that could be worked on. This wasn't the only kind of conditioning that we did by far, but an important part. I played both ways and never ran out of gas. BC simply ran out of gas, they were more skilled overall than Calvert and should have won. It is true Calvert has no XC program, but their kids will go play a couple of hours of full court BB after practice, they did not run out of gas. Six man requires endurance more so than 11 man. I see a good number of 6M games that are lost due to poor endurance conditioning. How can running a couple of miles at the start of practice be a bad thing ?