Strengthen your core after 55 with 4 chair drills that train rotation, lower abs, and anti-rotation without floor strain.

Build core strength after 50 with 5 bodyweight moves that train bracing and control, often faster than planks.

If the goal of your workout is to walk away with a chiseled six-pack, you’re missing the point. Credit...Gritchelle Fallesgon for The New York Times Supported by By Jenny Marder To perform well at ...