The nation's top two marks were set at the St. Christopher's Indoor Track & Field Invitational on Friday in Richmond, Virginia.
See which girls have improved the most in the 200m dash over the past three years.
We caught up with Olympian and Frisco Heritage coach Chryste Gaines while shooting a Workout Wednesday earlier this week.
There are five live events you can watch this weekend with a MileSplit Universal subscription.
Rohann Asfaw from Rockville and Ryan Lockett from had an epic battle at last year's Montgomery Invitational.
We take a look at how Mayson Conner's meet record at the Texas A&M High School Invitational stacks up against some of the best marks of the past decade.
Coach Donald Miller from DeSoto talks about proper form over wickets and how it translates into great running technique.
Watch the U.S. Army WCAP and ADP guys run a crazy 10x800m workout at altitude.
See what four-time world champion and Olympic gold medalist Dwight Phillips has to say about proper long jump form and the two most common mistakes.
Coach Jones talks about everything from filming athletes using the Coaches eye app to the positives and negatives of Twitter.
Olympic gold medalist Jeneba Tarmoh breaks down proper handoff technique.
Bailey Lear anchors this Tasty Race of the Week.
Garner junior Randolph Ross currently holds the U.S. No. 1 time in the 500m.
Watch Sammy Watson's impressive 400, mile, and SMR triple from the 2016 Dartmouth Relays.
Some of the fastest times in the nation are run each year at the Texas A&M High School Indoor Classic.
We take a look to see some of the top emerging freshmen already this year.
Dawn Harper-Nelson breaks down getting over the fear of hurdling and getting back on track if you've clipped a hurdle.
We have six live events this weekend on MileSplit including the Ice Breaker Invitational, the Texas A&M High School Classic, the Dartmouth Relays, and the Ocean Breeze Freedom Games.
Duane Solomon talks about the importance of running a time trial before a big race.
Andre De Grasse and Chijindu Ujah workout with ALTIS training group.
Hear what Olympic bronze medalist Reese Hoffa has to say about preparing to throw the shot.
See some of the top Workout Wednesdays of 2017.
Check out the fastest girls relay teams in the country so far.
Relive some of the best kicks from 2017.
As a tribute to some of the best high school athletes from the past year, enjoy MileSplit's #Hotin2017 Yule Log this holiday season.
Check out the top boys relay teams in the nation.
Rewatch Inside Look: Brie Oakley's Rise To No. 1.
Canadian Olympian Melissa Bishop gives insight to training for middle distances.
Watch all the race videos from the Wayne Gardiner Holiday Relays.