Black toning shorts with wireless controller and GYM IN A BOX branding
Woman activating the wireless controller on black toning shorts
Back view of black toning shorts with four integrated electrode pads
Woman wearing GluteMaster Body Pulse Toning Shorts with glowing electrode pads on the glutes
Product infographic for GluteMaster Body Pulse Toning Shorts showing features, shorts, controller, and box
Size guide infographic for GluteMaster™ Toning Shorts showing waist and hips measurements
Promotional ad graphic for GluteMaster Toning Shorts showing a woman wearing the shorts with electrode pads, features, and $299 offer
A dark promotional graphic for a wearable fitness device labeled 'GYM IN A BOX'. The design uses black and dark gray with gold text and borders…
Black GluteMaster StimFit™ toning shorts with integrated glute activation areas.
GYM IN A BOX® transformation results with before-and-after photos
GluteMaster™ Toning Shorts for leg and glute muscle activation.
GluteMaster Body Pulse™ Toning Shorts
Promotional graphic for GluteMaster Toning Shorts: woman wearing black shorts with 'Shape & Restore Your Body' text and benefits list
Person wearing black athletic shorts with blue design and 'Gym in a Box' branding, with 'Shape Fitness Awards' logo.
GluteMaster Shorts
GluteMaster Body Pulse™ Toning Shorts
Woman wearing black biker shorts with 'GYM IN A BOX' branding on a city street…
Woman wearing GluteMaster StimFit™ toning shorts for leg and glute muscle activation.
Promotional ad graphic for GluteMaster Shorts with female model, SELF Activewear Awards badge
GluteMaster™ Toning Shorts with integrated leg and glute activation areas.
Black GluteMaster™ smart toning shorts
Regular biker shorts versus GYM IN A BOX® GluteMaster Body Pulse™ Toning Shorts, showing the longer biker length, logo and wireless controller.
Gym In A Box®

GluteMaster Body Pulse™ Toning Shorts

Regular price $389.00 Sale price $299.00
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FREE SHIPPING on eligible U.S. orders. Shipping details.
CHRIS CUOMO’S FAVORITESGYM IN A BOX®

SHAPE YOUR LOWER-BODY ROUTINE IN 15 MINUTES

  • Activate glutes, hips and thighs to work toward a firmer, lifted-looking shape.
  • Choose your comfort level with a wireless controller and 50 intensities.
  • Pull on the shorts for a lower-body routine at home or on the go.

Choose your size and start your lower-body routine.

U.S. PATENTED • AS SEEN ON TV • SHIPS FROM BEVERLY HILLS

NOT REGULAR TONING SHORTS.

SMART LOWER-BODY ACTIVATION YOU CAN WEAR.

GluteMaster™ combines supportive performance fabric with integrated ToneUp15® StimFit zones targeting the glutes, thighs and hamstrings.

How It Works — In Plain Words

The shorts send patented microcurrent signals through built-in contact zones on your skin. These signals make your glutes, thighs and hamstrings contract on their own — like doing squats and lunges without moving. The 6 modes (U01–U06) vary the contraction pattern, 50 intensity levels control how strong each contraction feels, and 3 independent channels let you target different areas. With consistent daily use in 15-minute sessions, these contractions help tone and strengthen your lower body. Individual results vary.

What GluteMaster™ Does for You

  • Built-in activation zones target your glutes, hips, front thighs and back thighs — no gym, no squats required.
  • Pull them on, press start, and feel your lower body working during an automatic 15-minute session.
  • Wireless smart controller with 50 intensity levels — you choose the strength, from gentle to intense.
  • Supportive performance fabric that runs true to size (S–3XL). No wires, no gel pads.
  • Honest expectations: feel your glutes activating from your first session; visible changes build with consistent daily use. Individual results vary.
  • FREE shipping on eligible U.S. orders.

Lower-Body Activation You Can Wear.

Put them on. Press start. Feel your glutes, thighs and hamstrings activate.

GluteMaster Body Pulse™ Toning Shorts combine supportive performance fabric with patented GYM IN A BOX® ToneUp15® StimFit technology. Built-in contact zones deliver adjustable muscle stimulation for a hands-free lower-body routine at home, while traveling or alongside your regular workouts.

Fit: Runs true to size. Unisex sizing.

How This Technology Helps You

  • Where it works: Glutes, thighs and hamstrings.
  • What it does: Built-in zones deliver adjustable ToneUp15® StimFit pulses to key lower-body muscle groups.
  • What that means for you: You can add hands-free lower-body activation to light movement or a standalone routine.

Simple routine: Mist the contact zones and skin, wear the shorts snugly, then choose a comfortable intensity for a 15-minute session.

Targets

  • Glutes and hips
  • Front thighs (quadriceps)
  • Back thighs (hamstrings)

Smart Controller

  • 6 stimulation modes: U01–U06
  • 50 adjustable intensity levels
  • 3 independently selectable channels
  • Wireless and USB rechargeable
  • 15-minute automatic shutoff; a minimum 15-minute routine is recommended

What’s Included

  • GluteMaster Body Pulse™ Toning Shorts
  • Wireless smart controller
  • USB charging cable
  • User guide

How to Use

  1. Charge the controller for at least 90 minutes before first use.
  2. Lightly mist the built-in contact pads and your skin with water.
  3. Put the shorts on so every pad sits firmly against bare skin.
  4. Hold POWER/MODE for 3 seconds, choose a mode and channel, then increase intensity gradually.
  5. Use for at least 15 minutes; the controller switches off automatically after 15 minutes.

Important: The technology requires direct, secure skin contact. The built-in load-detection safety feature prevents pulse output when the pads are not fully connected to the skin.

Care and Safety

Hand wash according to care instructions using a mild detergent, no bleach; remove controller(s) before washing.

Patented GYM IN A BOX® Technology

PATENTED TECHNOLOGY • CREATED BY CRISTIANI'S BALANCE FITNESS & NUTRITION, LLC

Our proprietary wearable technology is protected by U.S. patents, including U.S. Utility Patent No. 11,925,799 B2 and U.S. Design Patent No. D846,836 S.

GYM IN A BOX® USA | ToneUp15® StimFit Technology

Designed and developed in the USA • Established 2015.

IMPORTANT SAFETY INFORMATION

Adult use only. Do not use during pregnancy or with a pacemaker or implanted electronic device.

CONSULT YOUR DOCTOR: If you have a medical condition, an implanted device, or any concerns about whether this product is appropriate for you, consult your doctor before use.

GYM IN A BOX® consumer fitness devices are intended for fitness and wellness use and are not intended to diagnose, treat, cure, or prevent any disease or medical condition. Individual experiences and results may vary.

State-of-the-Art Muscle Technology—Designed for Real Life

GYM IN A BOX® brings professional-inspired muscle-activation technology into a wearable system you can use at home, while traveling, or alongside your regular training—without the recurring appointments, travel time, and cumulative expense of studio-based sessions.

Designed to support targeted muscle engagement, toning, and a consistent strengthening routine. During weight-loss journeys—including for adults using GLP-1 medications—maintaining muscle-focused movement, resistance training, and adequate nutrition remains important. This wearable can support muscle engagement as part of that broader routine; it is not intended to prevent or treat muscle loss.

Add to cart — feel your glutes working in your first 15-minute session.

Patented wearable fitness, beauty and recovery technology—designed for powerful routines that fit real life.

GYM IN A BOX® combines portable design with ToneUp15® Pulse Body StimFit Technology to support targeted muscle activation and convenient self-care at home, at work or while traveling.

Choosing Your GYM IN A BOX®

What is GYM IN A BOX®?

GYM IN A BOX® is a Beverly Hills–based wearable fitness and beauty technology brand founded in 2015. Our portable systems are designed to support muscle activation, toning, performance, beauty and recovery without requiring a traditional gym setup.

What is ToneUp15® Pulse Body StimFit Technology?

ToneUp15® Pulse Body StimFit Technology uses controlled electrical stimulation to create muscle contractions in the targeted area. Intensity is adjustable, so you can begin low and increase gradually according to the instructions supplied with your product.

Which product should I choose?

  • Abs, waist and core: Choose one of our StimFitBelts™.
  • Multiple body areas: The 5‑in‑1 Full Body Muscle Booster Performance System™ targets the abs, arms, legs, calves and glutes.
  • Wearable apparel: BODYSCULPT™ Pants, GluteMaster Shorts, the BodyTone StimFit™ PowerShirt and BodyTone PRO™ PowerSuit provide integrated activation zones.
  • Beauty and self-care: Explore FACETONE™, LUMILUXE™, iGLOW™ and ULTRAFIRM™.
  • Recovery: Explore VitalStep™ and our sports-therapy systems.

Each product page lists its target areas, modes, intensity levels, sizing and session time.

Are the products unisex?

Yes. Our fitness wearables are designed for adult women and men. Apparel and belt sizing varies by product, so always use the size chart on the individual product page.

How do I choose my size?

Our apparel generally runs true to size. Measure yourself and compare your measurements with the size chart on the product page. Do not choose a smaller size merely for extra compression; the activation zones must sit correctly against the body.

Using Your Device

How long is a session?

Many ToneUp15® routines are designed for approximately 15 minutes. Some products have different programmed session times, including BODYSCULPT™ Pants. Follow the instructions provided with your specific device and do not exceed the recommended use.

How often can I use it?

Follow the schedule in your product instructions. Start conservatively, allow your body to adapt and avoid repeatedly stimulating the same muscle group beyond the recommended session time.

Does GYM IN A BOX® replace exercise?

It is designed to complement an active lifestyle and make targeted muscle activation more convenient. It is not a substitute for all movement, resistance training, balanced nutrition or medical care.

Is it intended for weight loss?

No. Our StimFit devices are not intended to produce weight loss. They are designed for fitness, muscle activation, toning and wellness support. Healthy body-composition goals still require appropriate nutrition, movement and lifestyle habits.

Is the sensation a vibration?

The tingling or pulsing sensation comes from electrical stimulation and the resulting muscle contractions. It is not simply mechanical vibration. Begin at the lowest intensity and increase gradually only when the device is positioned correctly and feels comfortable.

Why do the contractions feel weaker than before?

First check the charge level, controller connection, placement and skin contact. For products that require conductive contact, lightly moisten the appropriate contact area with water as directed—never use oils or lotions beneath the activation pads. Increase intensity gradually within your comfort level. If the issue continues, contact customer support with a short video or photo of the setup.

Why does the device not pulse when it is off my body?

Many of our systems include load detection and will not activate properly unless the contact areas are positioned fully against the skin. This is a safety feature, not a defect.

How long should I charge the controller?

Unless your product instructions state otherwise, allow approximately 90 minutes for a full charge before first use. Use the supplied charging accessories and keep controllers away from water.

Can I wear it while working, relaxing or traveling?

Many customers use our wireless wearables while working from home, relaxing or traveling. Use the device only where you can remain aware of the sensation and stop safely. Do not use it while driving, sleeping, bathing or performing any activity where involuntary muscle contractions could create risk.

Safety and Care

Who should not use electrical-stimulation products without medical clearance?

Do not use during pregnancy. Do not use if you have a pacemaker, defibrillator or another implanted electronic device. Ask a licensed healthcare professional before use if you have metal implants, recent surgery or injury, epilepsy, heart disease, cancer, diabetes, impaired sensation, a serious medical condition, or any concern about whether electrical stimulation is appropriate for you.

Where should I not place the device?

Use only on the body areas specified in the product instructions. Do not place stimulation across the chest, on the front or sides of the neck, on the head, over broken or irritated skin, or on areas with reduced sensation. Stop immediately if you experience pain, burning, dizziness, skin irritation or unusual discomfort.

Are these medical devices?

GYM IN A BOX® products are consumer fitness, beauty and wellness products. They are not intended to diagnose, treat, cure or prevent any disease or medical condition. Results vary.

How do I clean wearable apparel and belts?

Remove all controllers and electronic components before cleaning. Hand wash only when permitted by the product-care instructions, protect snaps and electronics from moisture, and air dry completely. Never place controllers in water, a washing machine or a dryer.

Results, Orders and Support

When will I see results?

Results differ based on the product, placement, intensity, consistency, activity level and individual body. No specific result or timeline is guaranteed. Correct setup and consistent use according to the instructions matter more than using excessive intensity.

Where do orders ship from?

Orders ship from Beverly Hills, California. Free U.S. shipping is offered, and tracking is provided when your order ships. Most U.S. deliveries arrive in approximately 5–7 business days, although carrier delays and remote destinations can take longer.

Can I pay in installments?

Eligible purchases can be split into interest-free installments through the payment options displayed at checkout. Approval and availability are determined by the payment provider.

What is the return policy?

Eligible regular-price items may be returned within 30 days when unused and in their original packaging. A return authorization is required. Sale, clearance, promotional and discounted purchases—including orders placed with an additional discount code—are final sale. Please review the current Return Policy before ordering.

Can I exchange an apparel item for another size?

Eligible unused apparel may qualify for a size exchange, subject to availability. Customers are responsible for return shipping. Contact customer support before sending any product back.

What should I send customer support if I need help?

Include your order number, product name, a description of the issue and a clear photo or short video showing the controller, placement and connections. This helps our Beverly Hills support team resolve setup questions faster.

GYM IN A BOX® — The original since 2015. Patented ToneUp15® Pulse Body StimFit Technology. Designed in Los Angeles and shipped from Beverly Hills.

Always follow the instructions supplied with your individual product. This FAQ provides general information and does not replace product instructions or professional medical advice.

Customer Reviews

Based on 19 reviews
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sarah beck
Great company and service

Wonderful customer service! This is why I love supporting US small businesses. They are responsive if you have a question or concern. Great company and product!

You are so welcome dear Sarah, thank you we love you!

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Katya
Love these EMS pants

Wow those are amazing, very strong booty contraction, see results fast!!!!

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Elisabeth
Omg those are hardcore

Got these MicroCurrent pants by gym in a box for Christmas and I swear, I never thought I could feel my muscles being contracted to this degree I mean those are intense! You know this technology works when your drenched just wearing these 15 min doing NOTHING, literally! My butt was sore for 3 days, but it is really worth it as you can literally see cellulites disappearing, absolutely magical and based on science do this is the real thing. My booty was flat, now starts to look rounder and more perky! Awesome!!

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Emily
I lost 30 lbs in 3 months with this

I wanted to get back in shape so I got GYM IN A BOX. In 3 months I went from 180 lbs to 142 lbs! Can only recommend getting these devices they really work it’s like wearing regular apparel it looks feels amazing !

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Suzy
Those pants rock

Just got these last week and I’m telling you my glutes are burrrrrrning!!! Girrrlz you need these!

Customer Reviews

Based on 18 reviews Write a review