Medicine ball (choose a weight that challenges you but allows you to maintain proper form)
Complete the circuit in 10 minutes: 45 seconds per exercise with a 15-second rest. For a tougher session, repeat the circuit 2-3 times, with 1-2 minutes of rest between rounds.
Sit on the floor, knees bent, feet flat, and hold a medicine ball with both hands. Lean back slightly, keeping your back straight, and twist your torso right, then left, while holding the ball.
Lie on your back, legs straight, arms extended with a medicine ball overhead. Lift legs and upper body, bringing the ball to your toes. Lower without touching the ground and repeat.
Begin in a plank position with forearms on the ground and body straight. Position the medicine ball under one hand.
Reach across with the opposite hand to tap the ball, then return to plank. Alternate tapping the ball with each hand.
Lie on your back with knees bent, feet lifted. Hold a medicine ball with both hands. Extend left leg, bring right knee to chest, and twist your upper body, bringing the ball to your right knee. Alternate sides.
Begin in a plank position with forearms on a medicine ball. Roll the ball forward while keeping your body straight, going as far as you can with control, and then roll it back to the starting position.
While lying on your back with legs raised vertically, hold a medicine ball with both hands and extend it towards your toes. Lower your upper body back down and repeat this motion, maintaining vertical legs throughout the exercise.