CrossFit Strong Island is a premium, 7,500 square foot CrossFit strength and conditioning training facility located in Merrick, Long Island, New York.

Our program efficiently combines the most effective training methods of Weightlifting, Gymnastics and High Intensity Cardio. There isn’t a strength and conditioning program anywhere that works with a greater diversity of tools, modalities and drills.

All of our training is done in a group class setting. The camaraderie of the group is what makes CrossFit and CrossFit Strong Island different than your regular run of the mill gym.

All of our staff are highly qualified fitness specialists, successful athletes and dedicated CrossFitters and coaches. We genuinely care about our members and how we can best impact their lives in a positive way.

If you’re questioning CrossFit, DON’T! Just come in and check out what all the hype is about!

We guarantee you will never look back!

CLICK HERE to get started today!



Struggling to trim down?  Working your butt off but not seeing the results?  Did you know CFSI offers nutritional services?  Check out our updated content located here.

Just in case you didn’t know, we’re suspending kids classes until September.

New afternoon/evening schedule will be as follows:
3:30 – 4:30 pm CF
4:30 – 5:30 pm CF
5:30 – 6:00 pm **New HIIT class
6:00 – 7:00 pm CF
7:00 – 8:00 pm CF
8:00 – 9:00 pm CF/Open Gym **now Mon-Thurs

Effective Monday, June 5th:

Full 30 min. Strong Island HIIT Class Schedule:
Monday, WednesdayFriday:
7:30 – 8:00 am
11:00 – 11:30 am
5:30 – 6:00 pm

7:30 – 8:00 am