P90X trainer Tony Horton is in the best shape of his life at 66. Here are his top longevity tips.

P90X creator Tony Horton said he's in better shape than ever at 66, thanks to tweaking his exercise routine to include a little less intensity and a bit more mobility.

Courtesy of Tony Horton

• Tony Horton, best known for the hit P90X workout, said he's thriving at 66 after tweaking his routine.
• Horton was diagnosed with a rare illness in 2017, and since then has followed a flexible plant-based diet.
• His current workout routine includes more yoga but also new challenges like obstacle courses.