![Cross Training – The Lingering Effects of the Navy Seal Fitness Challenge | Five K Runner: Going the (Short) Distance Cross Training – The Lingering Effects of the Navy Seal Fitness Challenge | Five K Runner: Going the (Short) Distance](https://fivekrunnerdotcom.files.wordpress.com/2015/08/img_20150819_231534933_hdr-e1440041399960.jpg)
Cross Training – The Lingering Effects of the Navy Seal Fitness Challenge | Five K Runner: Going the (Short) Distance
![David Goggins a U.S Navy Seal running The San Diego One Day. The race was 100 miles in 24 hours. He had zero prior training running ultramarathons and little to no food. David Goggins a U.S Navy Seal running The San Diego One Day. The race was 100 miles in 24 hours. He had zero prior training running ultramarathons and little to no food.](https://i.redd.it/098i3veoa4aa1.jpg)
David Goggins a U.S Navy Seal running The San Diego One Day. The race was 100 miles in 24 hours. He had zero prior training running ultramarathons and little to no food.
![File:US Navy 090804-N-5366K-094 Chief Special Warfare Operator (SEAL) Jason Torey keeps time as KNDD radio station host Andrew Harms, right, runs 1.5 miles to practice for the Navy SEAL Fitness Challenge at File:US Navy 090804-N-5366K-094 Chief Special Warfare Operator (SEAL) Jason Torey keeps time as KNDD radio station host Andrew Harms, right, runs 1.5 miles to practice for the Navy SEAL Fitness Challenge at](https://upload.wikimedia.org/wikipedia/commons/c/ce/US_Navy_090804-N-5366K-094_Chief_Special_Warfare_Operator_%28SEAL%29_Jason_Torey_keeps_time_as_KNDD_radio_station_host_Andrew_Harms%2C_right%2C_runs_1.5_miles_to_practice_for_the_Navy_SEAL_Fitness_Challenge_at_Surrey_Downs_Park.jpg)