There are so many effective ways to work your core at the gym and at the home. You could grab a kettlebell and do a full-body routine with sneaky abs engagement, do bodyweight abs moves like plank ...
Sit on the ball with your feet flat on the floor. Place your hands on the ball, or on your hips to make it more challenging.
You can sculpt a stronger using this three-move dumbbell workout from her trainer.
Balance training prevents falls, especially as you age. Try foot rolls, hip mobility to extension, and split squats or lunges ...