9Round is a fast, effective, and fun way to stay in shape. The pros: no class times, so you can work out whenever you want (provided they are open); there is always at least one trainer...
9Round - Boulder
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9Round is a unique fitness center that offers time-saving, full-body workouts designed for busy individuals. With no class times and a focus on circuit training, members can engage in a variety of strength training, cardio, and kickboxing exercises, all guided by trainers to maximize results.
The gym's mission is to provide an effective fitness experience for all levels, promoting strength, energy, and motivation. Members have reported significant weight loss and lifestyle changes, highlighting the supportive community and personalized approach that sets 9Round apart from traditional gyms.
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Reviews
My friend and I both tried this place for a week and felt ignored by the trainers. This is not a good place for anyone that isn't in top physical fitness. The manager is nice but not very...

9Rounds is an experience! You're able to drop in at any time and get a kick ass work out in. If you're not dripping sweat by the end, you weren't pushing yourself hard enough. They trainers are...

This place is awesome. Best 30 minutes of my day! Jack is great. I love just getting in, working out, then before I know it, it's over. It's hard, but worth it!

9 rounds is an unbelievably amazing workout, taught by the most friendly trainers and an unforgettable experience.