Join a community that feels like home. At Unknown Strength Gym, we’re not just a place to work out — we’re a supportive group, united by a commitment to health and fitness. Here, your goals become our goals, and together, we create a foundation for a stronger, healthier you!

unknown Strength gym floor

monthly membership 

Members of Unknown Strength must agree to (and sign) the policies and procedures outlined below. Failure to adhere to these policies and procedures will result in suspension, up to and including termination of membership. Members must also agree to and sign the attached liability waiver.

Membership Fees * Note taxes  are included in the price shown below.

Standard membership: $52.99/month
Discounted membership: $47.99 /month (military, first responders, veterans)

Day pass: $10
Weekly pass: $20
There is no contract required. All memberships will be month-to-month. There are no maintenance fees.

*Must show a physical and valid Military, First Responder, or Student I.D

Membership payments using ACH are preferred. If credit cards or debit cards are used for monthly memberships, a 3% charge will be added to the monthly membership cost.

Cancellation Policy

There is no cancellation fee. If your membership is canceled before your next billing date, you will not be charged for the following month.

Hours of Operation

Gym Floor: Open 24/7.
Staffed: Mon-Fri (8am-8pm), Sat (8am-2pm), Sun (8am-12pm).
General Policies and Procedures

Proper Attire: Wear appropriate workout attire, including athletic shoes, and attire that is respectful to others. A locker room and posing room will be provided for members. Keep clothes on while out on the workout floor.

Purchase Your Gym Membership Here.

Location & HOURS 

Hours of operation (staffed)

24/7 Membership is  available if you have an active membership.

Mon-Fri 8am-8pm
Sat 8am-2pm
Sun 8am-12pm

Location is 450 S Spruce St Manteno, IL 60950 unit B,C,D

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