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Brain Training For Runners: A Revolutionary New Training System to Improve Endurance, Speed, Health, and Res ults
amazon.com

The Combo Runner also performs equally well in races of 5K to the marathon, placing nearly the same compared to his peers in each distance.
Greg McMillan • YOU (Only Faster)
Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond
amazon.com

My favorite cruise interval workout is 10 times 1000 meters (1 kilometer) with a one-minute recovery jog.
Greg McMillan • YOU (Only Faster)


as long as your foot is landing close to under your center of gravity, then you are fine no matter if you land on your rear-foot or mid-foot.