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HIIT The Ground Running Challenge

Get all the benefits of High Intensity Interval Training when you commit to this 6 week challenge that’s proven to improve your cardio, build your endurance, and expand your fitness limits.



1. Register online, by phone, or in person 
2. Join the private support + education group in our mobile app
3. Meet with a Personal Trainer to assess where you're at
4. Attend 2 HIIT classes each week for 6 weeks
5. Then, re-assess to see your improvement

Most-Improved wins a sweet trophy!



August 2nd, 2021 - Six Week Challenge (Check back later for 2022's HIIT Challenge dates!)
$25, Members only. Includes:

  • Pre and Post Challenge Assessment
  • Two InBody® Body Composition Analyses
  • Challenge Tank Top
  • Access to private group


WHAT and WHEN are the HIIT Classes?

Les Mills HIIT SPRINT: Sprint is a 30-minute High Intensity Interval Training (HIIT) workout, using an indoor bike to achieve fast results allowing your body to burn calories for hours even after the workout is finished. It's a short, intense style of training where the thrill and motivation comes from pushing your physical and mental limits.


  • Monday, 8:30 am
  • Tuesday, 5:15 pm
  • Wednesday, 8:30 am
  • Thursday, 5:15 pm
  • Friday, 8:30 am


Les Mills HIIT GRIT: Grit is 30 minutes of high intensity interval training (HIIT), that delivers transformative results through three different formats, Strength, Cardio, and Athletic, of course not at the same time. GRIT | Strength is designed to improve strength, cardio fitness and lean muscles. GRIT | Athletic is a sports conditioning workout. It's designed to help you perform like an athlete-hence the name! GRIT | Cardio focuses on cardiovascular fitness. It maximises calorie burning, increases speed and boosts fitness like nothing else. Each format smashes your fitness goals! Since HIIT Grit changes between cardio, strength, and athletic formats, please ask the instructor what equipment is needed when entering class.


  • Monday, 7:15 pm
  • Wednesday, 5:15 am
  • Thursday, 7:15 pm
  • Friday, 5:15 am


HIIT Bootcamp: A little bit of everything all rolled into one. This class smashes together something for everyone; Functional training, cardio, strength, and core work. 

HIIT Bootcamp

  • Tuesday, 4:15 pm
  • Friday, 8:30 am


If you're unable to meet in person for these HIIT classes, there are some pre-recorded HIIT classes in Virtual YMCA that you can do anytime!

What's so great about HIIT?

The question is what isn't great about HIIT! There are so many benefits of HIIT! Overall, HIIT produces many of the same health benefits as other forms of exercise, but in a shorter amount of time. These benefits include lowering body fat, resting heart rate, and blood pressure. HIIT can burn a ton of calories in a short amount of time and your metabolic rate is higher for hours even after exercising. HIIT can also improve oxygen consumption and muscle gain happens as well! This sounds like an overall win! 

What if I've never done a HIIT class?

First time? Cool! In every 30 minute class expect a period of work followed by a period of rest, repeated across multiple sets with different moves and sweet music for the duration of your workout. Remember, there is a modification for every exercise! You can do it!

When you join the challenge, you'll have access to our private group which is where Steffani will post videos about the HIIT classes here at the Y and what to expect in the classes!



I accepted the HIIT Challenge with Steffani because I was to a point where I knew I needed some added accountability and guidance when it came to my workouts. Personally, I was not being dedicated & seemed to give up easily on myself...consistency had gone out the window for me. A lot of added stress had taken over in my life for various reasons. From past experience, I knew that working out definitely has helped keep my anxiety under control. Anxiety was starting to take hold of me again--I could tell my mental & emotional health was starting to suffer. Physically, I also knew I had lost a lot of my muscle & endurance I gained from the past, so I thought this challenge would encourage me to slowly but surely get my strength back.

In full transparency, the challenge did not start off great! I signed up --- and then we took our three kids on a two week summer vacation! Lol! However, the challenge was in the back of my mind, even though I didn't get the type of HIIT workouts in that I wanted to. When I got back into town, I started getting to more group exercises because I had that accountability knowing I was a part of this challenge! I saw Steffani posting about it regularly in the app, so those were great reminders to do something that day...even when I didn't feel like it!

I started off slowly -- going to about 2 Les Mills classes per week. I struggled getting through them at first! However, after a couple weeks in, I could tell I was getting a little stronger each time & upped it to 3 classes per week! Seeing many familiar, smiling faces each week in my group classes really helped motivate me to want to keep coming back! I can tell that I thrive in group exercise -- I love the social part as well as just having an instructor tell me what to do workout-wise! :) It made me realize that it is crucial for me to find workouts/exercises I really ENJOY because it keeps me coming back for more!

On the morning of my post-assessment, I actually surprised myself! Did I lose a lot of weight? Nope. However, I beat my reps in all four of the exercises by quite a bit! My strength/endurance had clearly improved! In that moment of realization, I gave myself immediate grace and felt proud of those steps in the right direction for my health. (Plus, I know the scale is just a number...just another tool used to assess my health...I am more focused on wanting to FEEL better and gain more energy, endurance, & strength) Getting back into regular workouts have been excellent for my overall well-being...mentally, emotionally, & physically! 

I am a past participant in the Livestrong Program and now have the honor of being my dad's support person for the current Livestrong session! Ending on a strong note with Steffani's HIIT challenge guided me right into the 12 week Livestrong program...I feel so much more focused to remain consistent & push myself a little more each week! I plan to do another post-assessment after Livestrong is over with to see my progress!

I would recommend the HIIT Challenge to anyone I know. Steffani and ALL of the YMCA staff are nothing but positive, uplifting, & dedicated to helping you live a healthier & happier lifestyle. I feel blessed to be a part of the YMCA and all that they have to offer. Thank you for allowing me to be a part of this challenge!

- Kari Wood