KANSAS CITY, Mo. (AP) — The new year is upon you, and 28-year-old Wesley Hamilton knows the fear in your heart.

Resolved: You're going to lose weight.

Resolved: You're finally going to achieve that one great thing, whatever it is, that fills your loved ones with shimmering pride.

But can you, will you, really do it?

Hamilton understands. Five years ago in January, the Kansas City father suffered the most disastrous moment of his young life, the Kansas City Star (http://bit.ly/2iwrnTh ) reported.

He was 23, almost 24, non-athletic and vastly overweight — a 5-foot-4, 230-pound single dad. He was...