1. Grab a towel, t-shirt, band, or any sturdy, lightly-stretchable object you can pull apart without ripping. Try to rip the object apart with both hands.

2. As you maintain tension, keep your arms straight and raise your hands up in front of your body all the way overhead.

3. Reverse the movement, still maintaining tension, until your hands lower to the starting position.

4. Repeat for the desired number of repetitions, maintaining tension throughout.

1. Begin in a push-up position with your hands close together, forming a diamond shape with your thumbs and index fingers.

2. Keep your elbows close to your body as you lower your chest towards your hands, keeping your core engaged and your body in a straight line.

3. Pause briefly at the bottom of the movement, then push yourself back up to the starting position, using your chest and triceps muscles.

4. Repeat for the desired number of reps.

1. Start by standing with your feet shoulder-width apart, with your toes pointed slightly outward.

2. Lower your body down into a squat position by bending at the knees and hips, keeping your chest lifted and your weight in your heels.

3. Explosively jump up out of the squat, lifting your arms overhead for momentum.

4. Land softly back in the squat position and repeat the jump for the desired number of reps.