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The largest 24 Hour Gym and Fitness Center in Watertown, SD

Be A Better You!


If you are into bodybuilding, cardio workouts, power lifting, strength training, group fitness, or just getting started on fitness, we have weights & work out equipment for everyone! Not sure where to get started on fitness? Stop by and talk to one of our personal trainers to find an exercise plan that works best for you and your life.

Nutrition Store, Saunas, Tanning, Hydro Massage, Red Light Therapy & Many Other Amenities.

At The Gym, we offer many extras including red light therapy, hydro massage, tanning, Far Infrared Saunas, WiFi, Peak Performance Nutrition, and so much more. It's just like going to a day spa!

Your local gym and health club, fitness center & weight lifting gym located near you in downtown Watertown, SD.

The Gym Member Benefits

  • 24 Hour Full Service Fitness Center
  • Extensive Quality Lifting Equipment
  • Personal Trainers
  • Group Fitness Classes
  • Smoothie Plus Nutrition Store Discounts
  • Tanning
  • FAR Infrared Saunas
  • Hydro Massage
  • Red Light Therapy
  • InBody Body Composition Analyzer
  • Fitness on Demand Classes
  • Inversion Table
  • Weekly Prize Drawings

View Membership Options

  • elliptical
  • FAR Infrared Saunas
  • Nutrition Store
  • Free Weights
  • Red Light Therapy
  • TRX Bands
  • Tanning Beds
  • Hydro Massage

Upcoming Events

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Peak Performance Logo

We are more than just smoothies we are a full-line Nutrition Store!

Come in and talk with our friendly and knowledgeable staff. We want you to get educated on nutrition and health, not just sold on the latest fad product.  We want you to get the product you need to accomplish your goals. 

We offer a wide variety of nutritional items for everyone, our line-up includes supplements, vitamins, proteins, immunity and hormonal helps, diet and weight loss aids, sports nutrition, muscle and body building products, healthy snacks, energy drinks and so much more for your nutrition, health, and wellness needs.

From general health, to sports nutrition, to healthy snacks and sports drinks, we have something for everyone.

Stop by Peak Performance Nutrition Store in Watertown SD to find for all your supplements, health and wellness products. While here you can get a Protein Smoothie, a Pre Workout or Post Workout Drink or a delicious Meal replacement Shake made to order for you to take with you.

You don’t have to be a member of The Gym Inc. in Watertown SD to visit Peak Performance Nutrition, we are open to the public during staffed hours. The retail store is located right next to The Gym Inc. directly to the west at 203 E. Kemp Ave at a separate door entrance.

Open to the public during staffed hours in Watertown SD. Click here for our staffed hours.

Bonus: Members of The Gym Inc. Receive a Discount on all Peak Performance Nutrition Store Products!

News & Updates

Ohio Power Bars by Rogue

Author: The Gym Inc.

Posted On: 02-04-2022

Powerlifting is a competitive sport that requires physical strength, but also a mental toughness to lift the maximum weight possible. It takes lots of training on proper lifting techniques and physical strength building.


Recipe for Protein Muffins

Author: The Gym Inc.

Posted On: 01-11-2022

Try this yummy and healthy protein muffin recipe by clicking the link below.


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What Our Customers Are Saying...

"I've been in many gyms across the country and this is hands down the cleanest. Great variety of equipment and friendly staff. Best 24 hr gym in Watertown."

Kurt K.

"One of the absolute best gyms I have ever been too. Great equipment, friendly staff, and great price. A must do if you are in the area."

Kevin J.

"The best gym I’ve joined. Owners are very nice and pleasant to chat with and staff are very helpful! Very easy to find the motivation to go to this gym with everything they have to offer, as well as the atmosphere."

Adam C.

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