A 73-year-old who did her first pull-up at 63 works out six times a week. 3 simple things helped her get into shape.

Ginny MacColl got strong in her 60s, and competes in American Ninja Warrior in her 70s.

Ginny MacColl

• Ginny MacColl, 73, got fit in her 60s and now competes in American Ninja Warrior.
• She started by aiming to do one pull-up, which took her a year of strength training to achieve.
• MacColl set herself an achievable goal and was consistent with her workouts.

At 73, Ginny MacColl, an actor and former dancer in North Carolina, is stronger and fitter than ever.

Since achieving her first pull-up at 63...