The challengers say this changed their lives. Where do they go from here?

The clock approaches 1:30,Kate's goal time. Where is she? Plus: Valdi surges.

The challengers strugglewith low temperatures andhard uphill inclines.

Kate gets jittery before the gun, Deb starts out well, andValdi wants a beer by mile 2.

They trained for ten weeks.Now its time. Will Kate, Deb and Valdi make their goals?

The coach has some lastwords before the race.

How far is a half-marathon?Kate's students ask their classmates, and get some surprising answers.

Kate's official music video. Proof that training hard can do strange things to people.

Kate has a tough time staying on pace during her slower "easy runs," so she asks family and friends to help her.

Kate and the Gang Train for the Marathon in New York City

Kate gets some assistance with her training from Dropkick and Laserbeam.

Kate incorporates core training into her daily life as she prepares for the half marathon.

Kate tries to cut back on water stops during her runs. Pandemonium ensues.

Deb Dyle, a stay-at-home mother of two, started running to lose weight and help her son get in shape. She's hooked on the sport and wants to run 13.1 for the first time.

Valdi Sapira is a former marathoner, but a knee injury put him out of the sport for years - years he spent adding extra pounds. But now he's determined to get in shape, lose the weight, and get back into running.

Kate Hoof, a schoolteacher from Virginia, wants to break 1:30 in a half-marathon. Her best time so far is 1:37, but our expert team has a plan to get her across the finish line in time.

That’s what Kate, Valdi and Deb are doing - to lose weight, to run really fast, or just to go the distance for the first time. We paired them with experts to help them reach their goals – and can help you reach yours.