Here are two great reasons to do your workout with a partner:  it's more fun to have someone to sweat it out with, and you can do unique and effective exercises you can't do alone!  Try these three moves.

Medicine Ball Russian Twists

• Grab a 5- to 10-pound medicine ball (whatever works for both you and your partner), and sit facing away from each other with your knees bent.
• Hold the weight straight out in front of you and keep your back straight, with your torso at about a 45-degree angle to the floor.
• Twist your torso to the right, passing the medicine ball to your partner.
• Then twist to the left to catch the medicine ball as your partner passes it to you.
• Do 10 reps in this direction and then 10 reps in the other direction.

Partner Wall Sit

• Stand back-to-back.
• At the same time, both partners take small steps away from each other, lowering your hips until your thighs are parallel to the floor.  Check to make sure you both have your knees directly over your ankles.
• Hold here for 20 to 30 seconds, then walk your feet in and stand up.
• Repeat two more times.

Partner Towel Squats

• Grab a towel and roll it into a long rope with each partner holding onto one end with their left hand.
• Face each other, each with your feet slightly wider that hips-width distance apart.
• Simultaneously squat down, leaning back, until your hips are just below your knees.  Adjust the distance away from your partner if you need to.
• Then stand up at the same time — you can high-five as you come up!
• Do 10 reps on this side, then switch the towel and hold it in your right hands for another 10 reps.
• Repeat two more times.