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Welcome to Prescribed Fitness

The fitness community you've been looking for

Prescribed Fitness offers cross training focused on functional movements in a motivating group setting where becoming part of our community will get you results that you never imagined were possible.

Strong 4 Life

Strength & Fitness Classes for ages 50+

Inquire to see if spots are available!

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Kids and Pre-teen Fitness Classes

(Ages 5-18)

Check back next summer!

Ages 12-14 can come with a parent to class, ages 15-18 can join regular classes.

Our Kids and Youth Excel Fitness class is a strength and conditioning program designed for both athletes and non-athletes ranging from ages 5-18. The program combines age-appropriate weightlifting and gymnastics with high intensity training to deliver optimal fitness and performance, as well as to establish a lifetime love of fitness. Proper weightlifting techniques are taught to enhance strength and power under the watchful eye of our coaches. We also focus on basic gymnastics to increase agility, mobility and flexibility.

Our program will increase physical competence in 10 fitness domains: Cardiovascular and Respiratory Endurance, Stamina, Strength, Flexibility, Power, Speed, Coordination, Agility, Balance, and Accuracy.

As a member of our community you will experience more than just a good sweat

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Professional Programming with access to a platform so you can track your workouts

Social Support-our community will encourage you along the way

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Structured and Safe Environment

Nutritional Support 

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One on One Coaching

What does a class look like?

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Warm Up

At the beginning of each class you can expect a group warm up that targets specific areas to help prevent injury and prepare for the daily workout.

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A short exercise or focused lift dedicated to correct form and buiding strength.

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Work Out of the Day (WOD)

Our WOD is different every day. It is a higher intensity workout with varying movements, times, rep schemes.  This is where you will push yourself to grow. Our coaches will assist to ensure proper form and weight. This can vary and be adjusted based on skill and experience.  It is a motivating individual effort with an encouraging group.

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It's Your Time

to live a strong and healthy life surrounded by people who care

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Class Options

Come Visit

(All classes are 1 hour except Noon Express class)

  • M/T/W/TH: 5:30 AM, Noon Express (12:10-12:50), 4:15 PM, 5:30PM

  • T/W/TH's 6:30AM

  • Tuesdays 6:30-7:30PM open gym 

  • NEW! M/W's 6:30pm-7:30 Intro to Prescribed class series 1/8/24-1/24/24

  • Friday: 5:30 AM, Noon Express (12:10-12:50), 4:30 PM

  • Sat: 9 AM

  • Strong 4 Life: T/W/TH 8:30 AM

Become A Member

All options include tax and have no contracts or sign up fees
(payments are non refundable)


Unlimited singles

Individual Membership 
(ages 16+)


Same household 2 people

Join with your partner for a discounted rate!


Same household 3-6 people

Join with your whole family! Up to 6 people.  Immediate family members only.


Veterans, Firefighters, Police Officers and Paramedic Discounted Rate (10% off)

We appreciate your service!  Join for a discounted rate.


Student Discount

Show us your student ID for a major discount!


10 Class Punch Pass

Not sure how often you will be able to join us each month?  Consider a punch pass and come when you can! Expires one year from purchase. This is for our regular classes only, does NOT include Strong 4 Life.


Drop In

Coming from out of town or not ready to commit more than a class at a time?  Drop in for 15 dollars!


Monthly Seniors
(Regular Cross Training Classes-not Strong 4 Life)

Ages 55+


2 Weeks

Need to make sure this is the right place for you?  Come try us out 2 weeks for free! Does not include kids classes or intro classes


Stronger 4 Life (Beginners/ages 50+)
Every T/W/TH 8:30 AM

What sets Strong 4 Life apart from our other programs: Strong 4 Life is designed for a target audience of (50+) but is equally adapted to clients of any age who have injuries or movement / range-of-motion limitations that threaten their daily functionality. (E.g. Early-Stage Parkinson’s, Multiple Sclerosis, Knee/Hip/Shoulder surgery/replacement, Sarcopenia, etc.) STRONG4LIFE Method focuses on four pillars of longevity; balance, posture, strength and independence. The programing draws from the fundamental roots of CrossFit and other Functional Movement exercise programs to emphasis the development of strength and mobility to support “everyday life” activities, thereby improving the quality of life and maintaining that quality of physical acuity to a much greater age. We’re not training seniors to compete in the CrossFit Games. We are training them to compete in the “game of life” for as long as possible.


Strong 4 Life Couples

Every T/W/TH 8:30 AM


Teens Punch Pass (ages 15-18 only) for regular classes

Not sure how often you'll make it?  A punch pass expires 1 year from purchase.  $7.50 per class.


Intro to Prescribed Fitness Class Series

For beginners only.  M/W's 6:30PM x 3 weeks, then come to any regular 2 classes the 4th week.

Next class begins Jan. 8th

-Learn terminology -Appropriate technique -Find your own personal modifications so you can merge into our regular classes with confidence!

Child care included this session only!  New Year special!

$149.99-New Years Special! 
Offer expires 12/31. (Reg price $300)

Intro to Prescribed Fitness Class Series-3 month membership

For beginners only.  M/W's 6:30PM x 3 weeks, then come to any regular 2 classes the remainder of the 3 months.

Next class begins Jan. 8th

-Learn terminology -Appropriate technique -Find your own personal modifications so you can merge into our regular classes with confidence!

Child care included this session only!  New Year special!

Our Coaches

Kari Fleming has been active in the CrossFit community since 2013, when she first starting attending classes. She obtained her CrossFit Level 1 trainer in 2015 and has competed in various CrossFit competitions.

“My favorite part of CrossFit is the challenge each workout brings and the variety of movements that make me a better athlete.”

Kari is a certified Physician Assistant at Prairie Lakes Healthcare Systems and is passionate about sharing the importance of exercise with her patients.

Kari, her husband Ben, and 2 children, Cooper and Merritt, live outside of Watertown and enjoy spending time outdoors and living an active lifestyle.


Kari Fleming

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Josh Hansen

Josh grew up in Southeast MN and started CrossFit in 2016 at New Ulm CrossFit.  From there his love for working out grew and has brought him here.  He enjoys competing in CrossFit in all forms; individually or on a team because who doesn't love to work out with other people!  He is a Level 2 CrossFit trainer.  When Josh is not working out, he tries his best to play golf.


Alison Gerrish

Physician Assistant and gym owner who knows what it is like to be intimidated to join a new gym.  It took her husband over a year to convince her to walk in the door at her first CrossFit gym in 2018 and now she's hooked.  Alison is a member of the American College of Lifestyle Medicine and is passionate about using lifestyle medicine to optimize overall health.   She is certified in whole foods plant based nutrition, is a Certified Lifestyle Medicine Professional and is available as a health coach to her members. She is also a Level 2 CrossFit Trainer. Alison is a mom to 3 young children.

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Jackie Burghardt

Jackie is a Watertown, SD native who is married and has three adult children.  She has always enjoyed working out, but didn't start running more seriously until she was in her 40’s and then later found CrossFit in 2013.  She was hooked after the first class, and faithfully attended 5-6 days a week.  What she loves most about the CrossFit style workouts is how they can be adapted to all fitness levels.  She has competed in partner competitions and also the Masters 50+ division at the Dakota Games.  Jackie received her CrossFit Level 1 Trainer in 2018 and Level 2 in 2022 and looks forward to meeting new people and helping them achieve their fitness goals.


Brookney Delgado

Brookney was first introduced to CrossFit by her brother, but it took her about 5 years to get started with it herself. After taking that step, she was hooked. Brookney, along with her husband and 2 young children, have now made CrossFit a standard practice of their everyday lives. 


Brookney is a CrossFit Level 1 Trainer in addition to her full tim marketing position in Watertown. She enjoys competing in league sports, 5k’s and Spartan a races when she gets the chance.  

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Grace Stein

Grace has been doing CrossFit since the summer of 2018, but the CrossFit bug bit her in the fall of 2019. 
Grace grew up as a swimmer, swimming for over 10 years. Now, she leaves the water behind as she enters the CrossFit box 6 days per week. You can usually catch her in the gym each afternoon after finishing her job as a nanny for a local family. 
Grace has a passion for working out and has a heart for sharing that passion with others. She will gladly help with any questions you may have in the gym and wants to help you enjoy working out as much as she does!

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Paula Davis

Originally from MN but SD has been home now to her for many years, working as a Social Worker before retiring 6 years ago. Upon retiring she started cross training. She knew she needed to be stronger. Paula loves the workouts, because they are different every day. She is stronger now and feels physically and emotionally better. 
Paula has a supportive, retired husband and 3 adult children. She adores her 5 grandchildren and loves spending time with them.
Paula hopes to help others feel stronger and more fit as a coach in our Strong 4 Life Classes.

Barb Struwe

Farm girl from central South Dakota, Barb taught elementary education for 36 years within the Watertown School District.  She is retired and has two grown children.  She enjoys plants, reading, the lake, golfing, and adventures.  
Barb stared working out regularly in her 50's to become stronger for life. She feels it is easy to adapt Prescribed Fitness's workouts to match her abilities. Barb also loves the social community and the challenges presented at each workout.  She is excited to help others achieve their fitness goals as a coach in our Strong 4 Life classes.

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Holly Bratland

Dr. Greg Gerrish

Dr. Gerrish owns Prescribed Fitness with his wife, Alison. He started CrossFit in 2016 and enjoys the variability and functionality of the workouts. He loves how our Prescribed workouts translate into everyday life and outdoor activities. He is a Level 1 CrossFit Trainer and in his spare time he enjoys archery hunting and spending time with his family.

Holly grew up in Minnesota and now lives in Watertown with her husband and two dogs.  She is a full time hair stylist and have always enjoyed helping others feel their absolute best! 

She joined Prescribed Fitness when we opened our doors in 2020 and was immediately hooked.  As someone who was terrified to walk into a cross training gym, she is excited to encourage others like her to improve their mental and physical health! She is also a Level 1 CrossFit Trainer.

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Guy Arnold

Guy grew up in Kansas and moved to SD in 1997.  He started CrossFit in 2018 and fell in love with it. "I lifted weights for most of my life and thought that was the only thing that I would ever do until I went to one CrossFit class, and I knew that this was what I have been missing as an athlete.  

"The one thing I love about our gym is that we are a family, and we support and encourage each other.  People say that they are intimidated with this style of fitness because of the athletes that they see on TV, and then realize that when they walk through out doors is that we are athletes at all stages of and ages in life."

Guy is a medic in the Army National Guard and a Field Service Officer for the SD Dept. of Veteran Affairs.

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Jeremy Hennen

Jeremy has a background in health and fitness with a degree in Sports Management. Early on in his career he was a personal trainer then switched to CrossFit. He and his wife and 2 kids lived overseas for 7 years where they co-launched a successful crossfit gym from the ground up.

He loves coaching & helping people achieve their goals.

He has is Level 2 CrossFit Certificate as well as Olympic Lifting Certificate.


About Us

Dr. Greg Gerrish and his wife Alison, a Certified Physician Assistant, started Prescribed Fitness as a service to their community to help them achieve optimal health in a way that cannot be done in the hospital or clinic.

Exercise is one of the 6 pillars of health along with healthy eating, adequate sleep, social connections, avoiding risky substances and stress reduction. At Prescribed Fitness you will not just achieve an amazing work out that will help you manage your stress and sleep, you will also get to experience a supportive community of people that is unlike any other.

Join us for a free trial today!

Get In Touch

204 9th Ave SE
Watertown, SD 57201


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