I feel like most Core40s are pretty great, but this location seriously lacks energy and vibe. My instructor pretty much went through the motions and nothing more, didn't offer any corrections, wasn't clear about what the class was supposed to be doing and didn't really seem to care. Very unlike my experience at some of the other studios- usually it's a great workout and great energy! read more

I took Allison Spivey's class this morning and what a great workout!! She challenges you to push and work hard and is super motivating! I love a good ride to music coordination and she does just that! Started my morning off feeling amazing! Will definitely be back! read more

Always love this workout for kicking my butt and yesterday mornings class was no different. It's hard, but goes by quick with the constant workout change up focusing on your entire body and the upbeat music and instructor. Really helps work some of the harder to reach target areas! They've just recently moved to a beautiful new space, very open and clean. They have some nice supplies in the rest rooms if you forget something and the staff is always really friendly. :) read more

Bright airy studio just relocated upstairs where you get extra room. Amazing intense workout - 49 minutes flat- with staff that really care and help with adjustments even when you hate them for saying 'anyone can do anything for 1 minute' - ugh, planks. Helped transform body and so many classes per day can always fit you in. Available on ClassPass or for $150 unlimited month (first timers) which is expensive but worth it. Downsides /miss a class and $25 charge, no excuses. read more

*4.5 stars* I have been to 10 plus classes here and I think it will be a good time to write a review. First,I absolutely LOVE Core40. I love how the workout focus on helping you build lean muscle. I love how innovative and interesting the workout is. And most importantly, it's only 40 minutes. How awesome it is!! However, like what most people said, your experience here is largely depend on your instructors. That being said, I have experience one or two super cool instructors, who I will try my best to take their classes if I could. Most of the time, they are very energetic and good with instruction. Also, they will go around the classroom and correct students' forms. I have also experienced one or two not so good instructors, who have no energy whatsoever. They keep a monotone throughout the class and don't know how to motivate the students. They don't go around to help with the forms and apparently don't love their jobs. The rest either fall into the "meh" and "getting there" categories. You will soon understand that most instructors are going to say very similar things in classes, but some of them sound like they are reading off a script and some of them sound passionate and they enjoy their jobs. I really like Jamie's class but unfortunately, I think she moved away and no longer teach in SF. What a bummer :( ( Now my favorite instructor is Chelsea Bakken!) That being said, half of the star is taken out because of the levels of instructors being inconsistent. Also, I noticed that a lot of instructors in Core40 have another full-time job, so they might only teach very few times a week and a lot of them don't rotate around studios. That being said, if you really like one instructor, you may have to commit to a certain time and a certain location to take his or her classes. Although I am not 100% satisfy with the instructors but I still absolutely love Core40. I have never heard of Lagree fitness before I joined Core40. I tried it out of a whim and liked most people,I totally underestimated it. My first class absolutely killed me. Although I am a decently active person, I was struggling with a lot of exercises during the class. But for some reason, I was totally hooked, and I came back for more and more classes. I think the reason why I love it so much is each exercise isolates one muscle group, and I can feel that exact muscle group working, burning and begging for mercy. Biggest tip here is, the slower you do your move, the better it is. Try to do all your moves with controlled motion and engage your core. You will find this absolutely challenging once you try a class here. Although the moves may alter a bit each class, the general routine is pretty much the same. You always start with some core warm up, then move to leg, then move to upper body and wrap up with core again. And the flow of each move always follow the following five stages, first you send the carriage all the way out and all the way in, and then all the way out half way in, and then hold, after you hold, you start pulsing, and lastly, all the way out all the way in again. It's all about the little movements while keeping your form right with a slow and controlled motion. The full body classes are relatively fast paced, so I suggest you take a foundation class before that.I will expect a lot of people find it quite challenging at first but after a few classes, you will get the hang out of it. As you progress, you will know exactly how to do every move and learn how to slow down on the machine. I do find myself getting better in all these exercises. However, it doesn't mean it's not challenging any more. It still kicks my ass every time I go, but I find myself less panic in transiting to different moves and feel that I have a better balance on the machine. Also,Keep in mind that don't have a shower room and they don't offer tower service. Overall, I think it is very worthy to try it. read more

Beautiful studio and amazing work out! I love Cyna's classes, they're challenging and energetic and she takes the time to correct and give tips during class to make sure every student's form is perfect and they're getting the most out of their workout. I feel stronger already. read more

Really enjoyed the airy feeling at the 2nd floor. I recently joined this studio since moved closed by. Love the proximity and the work out! It is super easy on joints and challenging on muscles as everyone says. I can feel myself becoming strong just after 1 week. Very much looking forward to a body transformation! read more

I work in the SOMA area, so that dictates what classes I can take, Since i'm ff at 6 PM, availability of classes available on Classpass is limited. I signed up for the cycling class here. The studio itself is clean, modern, and a bit compact. The cycling class was OK. It's a small room with about 12-16 bikes (I believe?). There is no system available to see how you are doing. It's just you facing the instructor and music. Given that I did break a sweat, I didn't really know how well I did. I'll try this place again, if i'm in a pinch and need to a get a workout in for the week. read more

Update here - most instructors are great, and I've stopped going to the few that aren't as engaging. However, you've got to get your sound system figured out! With some instructors who are quieter, you can't hear what they're saying, which is actually super annoying at best and dangerous when doing precarious moves at worst. read more

Great full body workout- and great instructors who will help any level of experience. The small class size really allows for individual attention and training. read more

Amazing place for a kick your butt workout. Janie is a great instructor with a lot of energy and manual alignment corrections. The studio is very clean and evenly spaces out the megaformers. The girls that work at the front desk are friendly and pleasant. My only recommendation would be to provide towels, because clients like myself sometimes forget. read more

Wayyy to loud, I couldn't even focus on my workout. the music sucks I feel like I'm in a 90s nightclub, and not in a good way, why do you need a microphone, you're screaming at me at the top of your lungs when you're right there in front. Terrible experience read more

Love core40! As a classpasser, I've tried other reformer classes, and while I like all of them, Core 40 is my favorite. Their machines are nicer and the handles and are all cushioned; making the positions easier to complete without killing your wrists. The staff are all friendly, encouraging, and motivating. The studio is beautiful and clean; though parking can be tricky, give yourself plenty of time for that. Great sculpt workout and fun, upbeat spin classes as well. read more

Couldn't find parking, arrived 5 minutes late, they refused to let me participate in the class. Leave extra time to find parking, this neighborhood is tough! read more

Love this full body workout, it is challenging and different, which is what I needed. I have seen a significant change in my body from just 3 months of working out- which the gym never did. Cyna is a great instructor, she corrects when needed and makes it a fun workout. She makes the effort to connect with clients, I always look forward to taking her classes. read more

Patiently waiting to see how this place transforms (showers?!!). Spin studio is temporarily located upstairs in a makeshift space while the downstairs in being remodeled - which I almost don't mind because it is so light and airy. Most of my favorite instructors have recently moved on which is a bummer, but Nigel has taken over some classes, and I love him, so that's a plus and gives me hope for what's to come. I am crossing my fingers that with the downstairs remodel come some upgrades to bikes. So many of the bikes have pedal straps that are either missing or are very worn out and lack the ability to be tightened. So if you don't have cycling shoes (which I am now investing in for this exact reason) before you settle in, make sure to test that out first. Come early so you don't wind up with the back bike bikes that don't have straps at all. read more

What do I say. I have tried them all : BodyRok, PilatesProWorks etc etc. But core 40 is my fav. Ashley on tuesday mornings for the foundation class is amazing ! She is helpful, attentive and in just 40 minutes you'd be sweating and every muscle in your body would have done work. This workout is a quick in and out. So there is no stretching before or after. That's something you need to do. But otherwise its kick ass. And best of all its on classpass ! read more

I'm two weeks into my trial month at Core40 and am absolutely loving it! I work out often and am always looking for a new challenging whole body workout. Core40 is what I've been missing. The classes are always different. I've taken 4 different teachers and have enjoyed them all. Some definitely harder than others, but I always leave with Jello legs and sore abs. You get an amazing workout in only 40 minutes. Yes, Core40 is expensive, but look around.... Anything is SF is this same price or more and doesn't offer what Core40 does. I appreciate that they offer great deals on first class, intro month, and unlimited month offers. Not only is that amazing and almost unheard of in SF, but a membership gets you into any of their numerous studios around SF. read more

Core40 has really top quality instructors (especially if you compare them to BodyRok) at both this location and Nob Hill. Although they use different equipment than Pilates ProWorks, I kind of group these exercises together, and their instructors are the same high quality as Pilates ProW. Clean studio, doesn't feel cramped even though the equipment is pretty close together. The instructors are hands on and never judge-y. Tough stuff, but so great. Try it if you haven't. They let you bring your bike inside. Lockers. Tampons! read more

Great studio for both Pilates and Cycle. All of the instructors that I've had have been great! That studio is very clean as well. They have changing rooms if you are coming from work or if you're in street clothes. The workout is excellent as well. read more

I'm obsessed with these reformers and core40! (Although I have not tried any other reformer classes - why bother when you already found a great one in close proximity!) I'm on my 4th month and as of writing this today - I am still sore! They find ways to really challenge my muscles and I'd think by now I've learned and got used to the moves, no way! It's such a mental challenge every day in this class. I do it 3-4x a week and absolutely feel stronger every day. The only reason I gave this a 4 not a 5 is that I'm the type that loves to improve my form. And I would say only about 3 of the 7 ish instructors I've taken this class with has challenged me to correct my form and motivate me. I know not everyone wants this so this may be a good thing for others, but there are some instructors who just does the bare minimum and doesn't bother to get the class aligned. I'd imagine this is a similar case with whatever fitness class you do - so my recommendation is to try out a few different instructors before u make a final judgement on the class. Overall I'm obsessed with the exercise itself and would highly recommend it! read more

Took my first lagree class here with Chelsea. She was an awesome instructor and adjusted me/gave me lots of feedback. Fun and intense workout! read more

I've only been once but had such an amazing experience that a 5 star review is worth it! I'm new to this workout, and the instructor Catherine Y was so helpful, patience and attentive. I felt like I had a personal session. She took the time to work with me and correct my form throughout the 40 minute class. Looking forward to coming back. read more

Charlene is an EXCELLENT instructor!!! She's challenging, encouraging & very clear with instruction. Great music too.

Ummm.....AWESSSOMMMEEE. I have a girl crush on several of the instructors. They are amazing, and the work out kicks your bootie. Totally in love. Cost is high but ehhhh...so is everything else in SF. read more

I wanted to make some comments/suggestions since it seems the studio reads these yelp reviews. It's been a month and most of your instructors are really great and I enjoy the workouts. However, you have a couple of instructors who never demonstrate the exercises and also aren't great with their verbal cueing. I understand and certainly don't expect instructors to be working out with us, I know that some of them are teaching three and four classes straight in a row, and they are probably exhausted. However, I'm talking about simply getting on the machine and showing us the start off position. These classes are fast-paced, so when half the class is looking around confused, not knowing where we are supposed to be on the reformer, where feet are supposed to go, how many springs we are using, it wastes valuable time in a short 40 minute class and you are really not serving your clients well. On the other hand, there are some instructors who cue perfectly, that know just went to repeat pertinent info, like how many springs we are using on that next exercise, what muscles you are supposed to be focusing on, etc. Ironically, those same good instructors also tend to be the ones that demonstrate every exercise so you get a visual as well as an auditory cue. Please encourage all your instructors to physically demonstrate the exercises, so that even if their verbal cues are weak, we don't waste precious workout time, it's very frustrating. read more