7 gym tools celebrity trainers use to train their high-profile clients - and they're all surprisingly affordable

Swan's recommendation: Sling Shot Hip Circle by Mark Bell, available at Amazon for $27.50

The Sling Shot Hip Circle is a great warmup for the lower body, particularly for the glutes. Instead of wavering when you squat, the Sling Shot cues athletes to push their knees out while squatting, activating more muscles and getting better results all over. It won't snap or roll up on itself, and you can use it at any fitness level for a good burn.

Swan's recommendation: ONNIT Designer Sculpted Kettlebells, available at Amazon for $159.95

Note: Currently unavailable

Alternate: Yes4All Solid Cast Iron Kettlebells, available at Amazon for $16.99

These designer sculpted kettlebells add some fun to the average workout, (though you can find cheaper options, too). The ONNIT kettlebells are perfectly balanced and built with chip-resistant iron for longevity and durability. If you're looking to stock up on kettlebells in varying weights, you may want to opt for cheaper versions that will still do the trick nicely.

Swan's recommendation: Rx Smart Gear Jump Rope, available at Amazon for $45

If you've spent any time on any fitness forum that mentions cardio, you've likely already been told to pick up the play tool of your childhood for a new and calorie-torching workout. This one has a multi-directional swivel axis bearing system to make your movements smoother. If it looks familiar, you might have seen it in a CrossFit class.

Swan's recommendation: Lynx Fitness Slide Board, available at Lynx Fitness for $289 Alternate: Flowin Exerciser, available at Walmart for $212.74 Alternate: Elite Sportz Exercise Sliders, available at Amazon for $10

Slide boards utilize friction training for a full 360-degree range of motion in your workouts. You can slide into each position seamlessly, engaging muscles throughout by the smooth transition. These low-impact tools are particularly useful for core exercises and increasing balance and flexibility. Given the more natural "gliding" process, these tools should also decrease the likeliness of injury.

Walker's recommendation: Cap Barbell 10lb Dumbbells, available at Overstock for $39.99

These Dumbbells come in a hex shape to prevent rolling as well as to make storage easier and the hand grips are no-fuss and ergonomic.

Walker's recommendation: Pair of Jasmine Fitness Pilates Weighted Balls, available at Amazon for $30.37

Note: Currently unavailable

Alternate: FitBALL Mini Exercise Ball, available at Amazon for $12.59

Pilates balls are among the most versatile tools you can have in your home gym and work especially well for those looking to engage their core. While you can use mini exercise balls in workouts to add more weight or the element of balance (which should improve your muscle engagement and form), they're also useful post-workout to relax the lower back.

These Jasmine balls are filled with sand so they can mold to the shape of your hand or spine and then return to original form once you're finished. They also happen to be pretty comfortable for the same reason.

Walker's recommendation: Bintiva Resistance Bands, available on Amazon for $15.99

Note: Currently unavailable

This set includes six resistance bands. Strong, flexible, and packaged with an illustrated starter guide for newcomers, they're a great beginner tool (and one that you never outgrow). They're portable, lightweight, and effective.