Get ClassPass

Start taking classes at CORE40 and other studios!

How it works

CORE40 Foundation at CORE40

884 Folsom St, San Francisco, CA, 94107

Start taking classes at CORE40 and other studios!

How it works

About this class

If you have a strong foundation, you can build anything on it. Their 40-minute Foundation class is a great place to start for those who are new to CORE40. If you are new to the studio, we strongly recommend that you take a Foundation class first so that you can get comfortable with their equipment, their 40-minute format and the fundamental exercises. But don't let the name fool you into thinking this class is only for newbies. Veterans are welcome and will be challenged, we promise! You will definitely break a sweat as you strengthen, tighten, tone and stretch your body in this fun, intense, music-inspired group class.

About this studio

CORE40 logo

In just 40 minutes, you will experience the most revolutionary core-focused, full body workout in the fitness industry – one that not only works over 600 muscles per session, but…read more

500+ ratings for CORE40 Foundation

5 stars
4 stars
3 stars
2 stars
1 star
based on 765 ratings

Most recent reviews

CORE40 Foundation with Isabel
Isabel was great! Very thoughtful and cares about folks in her class!! 5 stars would do it again!
CORE40 Foundation with Jessica
Great instructor! Good pace, clear instructions, and the right amount of individualized feedback.
CORE40 Foundation with Eliza
I got no help or instruction when it was clear that I was new / struggling in the class
CORE40 Foundation with Steen
Hands on and very energetic
CORE40 Foundation with Nitar
First time doing pilates!Nitar brought me a great experience. The foundation class moves not that fast, good for first timer. It’s more about control and flexibility but also a lot work for core. Like the studio also. Will come again!
CORE40 Foundation with Laura
Really felt the burn from the workout!
CORE40 Foundation with Libby
It was a good and challenging workout, but the trainer made no effort to correct my posture or form even when I could clearly see that I was not doing it right.
CORE40 Foundation with Nitar
The class was great in terms of the quality of workout, but it felt more advanced than the foundation class I was expecting. The ramps were still used and transitions were quick without a lot of help from the instructor.
CORE40 Foundation with Madison
This was the best Core40 class I’ve ever taken. I couldn’t believe how sore I was the next day. Madison made the class fly by. Even though the location is out of the way I will be returning soon!
CORE40 Foundation
Lolo is amazing! The class was perfect for people at all levels, and I had a great workout.
Friday, May 24
  • Fri
  • Sat
  • Sun
  • Mon
  • Tue
  • Wed
  • Thu
  • Fri
  • Sat
  • Sun
  • Mon
  • Tue
  • Wed
  • Thu
There are no upcoming “CORE40 Foundation” classes on this day.

View the full studio schedule to see other classes.

Not ready to start today?

Get an inside look at the classes available in your neighborhood with our fitness city guide.

How to prepare

WHAT TO BRING/EXPECT: • A towel if desired (CORE40 is an ecoconscious organization and does not offer towel service due to the water waste it creates) • A water bottle, which you can fill using our filtered water system • Please wear anything you might feel comfortable doing yoga or running in • The CORE40 workout is done wearing grip socks.We have grip socks for sale at the studio • For COREcycle and COREcombo classes, spin shoes (SPD clip-compatible) or athletic shoes can be worn.Please bring your own shoes • Refer to our FAQs for more info

How to get there

PLEASE ENTER 1010# ON THE KEYPAD TO ACCESS STUDIO CLASS SWITCH POLICY:Drop-ins to a class other than your reserved time/location will be charged at $35 LATE ARRIVAL POLICY:Please arrive a few minutes prior to class start time. Your spot will be held up to the time class starts then it may be given to a standby client. If it's your first class, you MUST arrive at least 5 minutes prior class start time in order to get the machine rundown.If you don't arrive early you will be asked to reschedule your first class due to safety concerns.



Start taking classes at CORE40 and other studios!

Get started

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!