I'm a personal trainer — forget heavy weights and try this 3-move workout to build strong arms and abs

A personal trainer shares a three-move bodyweight workout you can do without weights to strengthen your abs and arms.
Cassidy Thompson on MSN

Deep core & abs workout: 4 full sets for strength and definition

Strengthen your core and sculpt your abs with this intense 4-set workout. Designed for all fitness levels, these exercises ...