Ginny MacColl, 73, got fit in her 60s and now competes in American Ninja Warrior. She started by aiming to do one pull-up.

Ninja, popularized by the hit television series American Ninja Warrior ... A combination ninja warrior and parkour gym, Ninja Fit helps build stamina, flexibility, and self-assurance.

It is the small things that often prove to Ginny MacColl that she is on the right track in her fitness regimen ... entertainment reality show American Ninja Warrior and the oldest person to ...