8th Day Gym – Functional Fitness

8th Day Gym - Functional Fitness is a gym in Grand Rapids, MI, located at 130 Market Ave SW #106. The facility offers Hyrox, CrossFit, and BootCamp classes alongside open gym access for members seeking structured programming or independent training time. With a perfect 5.00 rating based on customer reviews, the gym serves athletes of all levels, from beginners to elite competitors, in a downtown location near Founder’s Brewery and the Acrisure Amphitheater.

Owner Joe Cebulski, an Olympic-level decathlete for Team USA, established the gym in 2010 with just two members and has grown it into a 30,000-square-foot facility housing over 500 members. The gym features three class spaces and two open gym areas, including a dedicated Hyrox training space designed to mirror race-day conditions. This area includes 30 Concept2 Rowers, 20 SkiErg stations, 24 CENTR Runners, 10 sled lanes, and 17 floating wall ball targets, allowing athletes to train with full capacity without waiting for equipment.

Programming is intelligently planned over days and months rather than being random, with sessions logged in the SteamFit digital training tracker to record progress and keep the community connected. Classes include Hyrox training, which combines running with functional fitness stations; CrossFit, which blends weightlifting, gymnastics, and cardio; and BootCamp, a high-intensity interval training option with a lower barrier to entry that scales for all fitness levels. Head Coach Dylan Hamming made his individual debut at the 2026 CrossFit Games, earning Rookie of the Year honors, while athlete Alyssa McElheny became the 2026 HYROX World Champion in the Elite Women’s division in her debut season.

The gym holds a perfect 5.00 rating from its customers, reflecting a community that values expert coaching, creative programming, and a supportive environment. The consistent positive reviews highlight the welcoming atmosphere and the quality of instruction provided by the coaching staff, which accommodates everyone from true beginners to seasoned athletes.

8th Day Gym - Functional Fitness combines elite-level coaching with a supportive community, making it a premier destination for functional fitness in Grand Rapids.

The facility sits on Market Avenue Southwest, just a short distance from Cherry Street Southwest and the Rapid Central Bike Parking. It is located about 0.1 miles from the Acrisure Amphitheater and the Downtown Dog Park.

BizScoreAI gives the business an Authority score of 75 out of 100. This reflects that the website clearly shows who is behind the business, which helps AI assistants and search engines decide to recommend it. The Performance score is 70 out of 100. This measures how quickly the website loads, which keeps visitors on the page and is a factor search engines use in ranking.