Covid-19 Guidelines

Check out the special page including all details about our COVID-19 protocol


No problem! You can rent a pair for €3 or buy a pair of boxing gloves for € 50.

We don’t rent them (gross!) but we do sell them. Prices are between €13 – €15. 

Absolutely! We offer FIGHT beginners technique classes where you will learn the basic techniques to jab, cross, and kick. Check out the schedule to see when the beginners classes are taught. 

Check out all class descriptions on our workouts page. 


Yes we do! In fact, we get a lot of compliments from our members about our showers, they are gooood!! We also provide shampoo and shower gel for your convenience 🙂 AND a blow dryer for the ladies.

Yes highly recommended! Especially when you know that you sweat a lot 🙂

Yes we do! Bring your own lock, or buy one in the gym for €4. 

Yes we do! You can train in the open gym by yourself during our opening hours

First check this tour of Underground (pretty cool video right!?) and it will answer a lot of your questions right away. As you can see we focus mostly on strength training using free weights like kettlebells, dumbbells and barbells. Of course you will find some machines like a rower and a bike, but don’t expect rows of treadmills ;). 


The membership runs pro-rata, this means that you pay starting from your first day of your membership. For example, if you became a member on the 15th of June, you will pay 15/30 x €69 = €34,50 for the month of June, and €69 for the month of July. Your next automated invoices will be for €69, and will occur around the 1st of each month.

Personal Training

Yes we do! Almost all of our trainers give PT, which is a personalized training session of (usually) 1 hour during which you will focus on whatever goal you have (kickboxing technique, strength, endurance, weight loss, muscle gain, injury recovery, pregnancy training, etc.) Please send an email to: if you have any additional questions. Or purchase a PT session here (PT is for Underground members only).

For a single person the PT rate is €75 for 1 hour, for a duo PT it’s €90 for 1 hour. Note: to book a PT session you must be a member @Underground. 


First, let us answer with a question… are you sure?!? Ok ok, if you really want to cancel, you can do so easily in the Underground app. Open the app, go to ‘my account’; select ‘products’, there you will see your membership; click on “active” and click on “end membership”. Please note the minimum contract term of 3 months and a 1 month notice period. 

Your membership runs for a minimum of 3 full months. After that, you may cancel with at least 1 month notice. 

Yes you may pause your contract, but only in case of an injury or pregnancy (medical note required) and not in retrospect. Please send an email to including medical note to pause your membership, and including the date you expect to return to the gym. Pausing is possible for minimum 1 and maximum 6 months. After 6 months, your membership will restart automatically (unless you email us well in advance).

First of all: can we join you? We love breaks as well, but unfortunately we can’t pause your contract for this reason. Consider this extra motivation to get back on track when you return. If you decide to cancel your membership for this reason, please note that re-activation costs €25.

Business training & events

Absolutely! Send us an email at with your wishes, number of people, what type of training etc. and we will come up with a nice training for your team / group of friends / bachelor / anything!

Sure! Send us an email at with your wishes, number of people, what type of training etc. and we will get back to you as soon as possible (that always means fast).

We are always open to discuss possibilities! Send us an email at with what you have in mind, and we will together see if we can make it work. Never been @Underground? Shame on you ;), but you are lucky, we made a video with a tour of the space