The Ultimate Treadmill Challenge - CMIYC This treadmill challenge is all about “not getting caught” by the clock by being ahead of the distance checkpoints each time they happen! A lot of people underestimate this challenge! Don’t fall into the trap of starting too slow, because even though the checkpoints are generous at first, they ramp up after the halfway point! I’d also advise against “intervals”. Don’t run fast, then slow down, then fast, then slow etc! Your BEST SHOT at getting as far as