Get ClassPass

Start taking classes at CORE40 and other studios for only $19

Get startedHow it works

CORE40 - Castro

4.85,906
4122 18th St, San Francisco, CA, 94114
Castro

Start taking classes at CORE40 and other studios for only $19

Get startedHow it works
Saturday, February 24
  • Sat
    24
  • Sun
    25
  • Mon
    26
  • Tue
    27
  • Wed
    28
  • Thur
    1
  • Fri
    2
  • Sat
    3
  • Sun
    4
  • Mon
    5
  • Tue
    6
  • Wed
    7
  • Thur
    8
  • Fri
    9
There are no upcoming classes on this day

Find the best studios near you.

Join our list and we’ll send you a guide to the best fitness studios nearby.

About this studio

This core-focused, full body workout on the Megaformer will build strength, tone, and increase balance, while working over 600 muscles in the body.

core40.com(415) 776-2673

How to prepare

Core Cycle: Sneakers or SPD cycling shoes are required, towel is optional Core 30/30: Non-Slip Tread Socks required (also sold at the studio starting @ $15), Sneakers or SPD cycling shoes are required, towel is optional NO RENTALS AVAILABLE •To reduce the risk of accidents and out of concern for everyone’s safety, glass bottles and open containers are not permitted in the studio.

How to get there

It is very important to arrive on time. If you arrive late and are not present when the instructor begins the session, your space may be given to a standby client. There is no grace period in this situation. Once class has started and your space has been given away, it is too disruptive to ask the drop-in client to get off the machine. To avoid this situation, please arrive at least 10 minutes before class. Refer to our FAQ section for more detail on our late arrival policy and other helpful info.

Studio amenities

Lockers

See similar studios with

500+ ratings for CORE40

5 stars
4 stars
3 stars
2 stars
1 star
4.8/5.0
based on 5,906 ratings

Most recent reviews

CORE40 Ramped with Ines
Didnt love this instructor
CORE40 Ramped with Ines
Great workout, didnt like the music
CORE40 Ramped with Jennie
Jennie is very attentive and so encouraging during class! She came back to do adjustments and added some new moves to the average lagree moves.
CORE40 Ramped with Lisa
Lisa is amazing!!!!
CORE40 Ramped with Lisa
Lisa is hardcore but so sweet and encouraging! This workout will surely kick your butt ;P
CORE40 Ramped with Lisa
Great workout! Lisa was amazing and I'm already looking for the next class with her!
CORE40 Ramped with Lisa
Studio was freezing! Did not break a sweat and I usually do. Too cold to work out. Also could not understand the instructor at all.
CORE40 Ramped with Christian
Very hard, especially upper body.
CORE40 Ramped with Christian
Always amazing! Great class!
CORE40 Ramped with Catherine
Their classes Need more personal attention from the instructor to avoid injuries. Class size too big for this workout.

For a limited time, start your first month on ClassPass Base for only $19

Redeem offer

What is ClassPass?

ClassPass is a new kind of gym membership that grants you access to thousands of different classes at studios and gyms in your city and around the world.

Price of membership depends on your plan type and city, and you can book and explore classes ranging from yoga to barre to cycling to martial arts – the options are truly endless!

The number of classes you can take and the number of times you can visit a studio per month depends on which plan you're on. You can figure out which plan you're on by going to your Account Settings and looking under 'Your current plan.' With hundreds of studios in our ever-growing network, you're bound to always find a new class to enjoy. When your cycle renews, you can go back and revisit those favorites yet again!