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. Stand straight up with your arms relaxed by your sides.

2. Keeping your arms straight, raise them overhead and slightly out to the sides to create a Y shape with your body.

3. Hold the Y position for a few seconds, then slowly lower back down to the starting position.

4. Repeat for the desired number of reps.

5. To increase the difficulty, you can hold light weights or resistance bands in your hands during the exercise.

1. Stand in a doorway, facing the doorjamb, feet hip-width apart. Bend both elbows at 90-degrees, make a fist, and place your fists against the wall.

2. Press into the wall as if you were attempting to push through the wall and into your abdomen. Your shoulder should be engaged, but you shouldn’t move your shoulder at any point during this movement.

3. Hold for a count of 5 and release. Repeat.

1. Position yourself in a side plank, left shoulder over left elbow and body in a strong, straight line.

2. Reach the fingertips of your right hand toward the ceiling.

3. Engage your core and twist your torso to the left, bringing your right hand down through the space between your torso and the floor as if you were trying to reach the wall behind your body.

4. Slowly rotate back to starting position. 5. Complete the desired number of repetitions before switching sides.

1. Stand with your feet shoulder-width apart and your arms straight out to your sides, parallel to the ground.

2. Cross your left arm over your right arm in front of your body.

3. Open your arms wide as possible, and then cross your right arm over your left arm in front of your body.

4. Repeat the crossing and opening of your arms for the desired number of repetitions.

1. Begin in a push-up position with your hands placed shoulder-width apart on the ground and your feet together.

2. Slowly walk your feet towards your hands until your hips are raised up in the air, and your body is in an inverted V-shape.

3. Lower your body towards the ground by flexing your elbows until your head almost touches the ground.

4. Push yourself back up to the starting position, using your arms and shoulders.

5. Repeat for the desired number of reps.

1. Start in a push-up position, but resting on your stomach, with your hands underneath your shoulders and your toes pressed into the ground.

2. In a controlled movement, push yourself back toward your heels, creating a partial downward-dog position. Pause only momentarily.

3. Push from your toes to extend your body forward until you are in a high plank position.

4. Lower yourself to the starting position.

5. Repeat for the prescribed number of reps, pausing briefly between each rep.