Chris Jackman shows us 4 different exercises with a baby: Situp, Glute Bridge, Lunge and Twist, and Squat and Press.

Deja Sheridan shows us 4 different exercises with the Barbell: Hamstring Curls, Hip Raise, Single Arm Rollout, and Rollout.

Watch Martin Park as he demonstrates how to use just the barbell in 4 exercises (the hang clean, front squat, overhead snatch, and ab rollout) for a full body workout.

Personal Trainer Trina Lavers is demonstrating four exercises with the barbell: an overhead squat, overhead press, Good Mornings, and the underhand row.

Personal Trainer Cezar Bestea specializes in functional training and is here demonstrating 4 exercises with the battle ropes: punches, burpee waves, russian twists, and jumping lunge waves.

Personal Trainer Kalena Morton demonstrates four different exercises you cab perform with a Bosu Ball: Squat, Toe Tap, Pushup, and Knee Drive.

Sarah Wright shows us 4 different exercises with the Bosu Ball: Pushup, Squat, Split Squat, and Skater Hop.

Deja Sheridan demonstrates how to use the Bulgarian Bag in four different exercises: the Clean and Squat, Squat Press, Side to Side, and Around the World.

Hailee Down shows us 4 different exercises with the Bulgarian Bag: the Swing, Squat, Pushup, and Sit-up.

Miguel Bautista shows us 4 different exercises with the Bulgarian Bag: Single Side Suples, Suples Spin, Swing Snatch, and Side Sling Suples.

Watch as Tanya Kuehn shows how to do four mobility exercises with the wooden dowel. These movements are great for a warm up, or a cool down after an upper body workout.

Personal Trainer Phoebe Li demonstrates four different exercises you can perform with Dumbbells: Lunge and Drive, Overhead Press, Shoulder Raise, and Pushup Row.

Scott Rae shows us how to use the foam roller to roll out the tension in your muscles. The four exercises demonstrated are: Hamstring Curls, Roll and Kick, Back Extensions, and the Glute roll.

Brian Houghton shows us 4 different exercises with the Gliding Disk: Corkscrew Pushup, Mountain Climbers, Archer Pushups, and Pike.

Chris O'Hare shows us 4 different exercises with the Kettle Bell: Pushup, Clean and Press, Row, and Clean and Lunge.

Watch Deja Sheridan, Personal Trainer and Kettlebell Certified Instructor, shows four different exercises using just the kettlebell (the kettlebell swing, lunge, overhead lunge, and swing and press).

Tony Nasato shows us 4 different exercises with the Kettlebell: the Swing and Press, Single Leg Deadlift, Squat and Press, and Around the Worlds.

Personal Trainer Kalena Morton demonstrates four different exercises you can perform with the Plyo Platform: Box Jumps, Knee to Elbow Pushups, One Leg Lunges, and Knee Drives.

Deja Sheridan shows us 4 different Ladder exercises: Karaoke, Switch and Lunge, a Drop Squat, and Walking Plank.

Tyler Yorko shows us 4 different exercises with the Landmine: Row, Lunge & Press, Core Twist, One Leg Deadlift.

Rodderick Carroll shows us 4 different exercises with the monkey bars: V-Sit Pullup, Hanging Leg Raises, Raise & Crunch, Swing

Brendan Campbell shows us 4 different exercises with the Row Machine: Row, Side Row, Roll-Out, Groin Slide.

Gemma Slaughter shows us 4 different exercises with the sand bag: a Slam & Burpee, Situps, Lunge & Twist, and Slide Through.

Sharaya Poulin shows us 4 different exercises with the Sled: Hamstring Curl, Pushup, Pull, Push.

Kalena Morton shows us 4 different exercises with the step: Drop Squat, Knee Drive, Pushup, and Jump Squat.

Zak Syens, Personal Trainer, demonstrates how to use the TRX Trainer with 4 different exercises: the Pushup, Reverse Crunch, the Pike, and the Cobra.

Personal Trainer, Brendan Campbell, demonstrates four wall ball exercises using a medicine ball. Here he's doing a side toss, switch toss, squat throw, and pushup hold. Try them for yourself!

Katie Pystchula shows us 4 different exercises with the Wall Ball: Russian Twist, Sit-Up Toss, Slam & Burpee, Overhead Side Slam.

Phil Rodgers shows us 4 different exercises with the Wall Ball: Overhead Squat, Squat & throw, Clean, and Ball Slams.