Is Pilates Enough, or Do You Need to Lift Weights Too?

For most people, Pilates on its own is not quite enough. It builds real core strength, control, mobility and balance, and it is a legitimate form of resistance training. But the load stays relatively light and it is hard to progressively overload, which is the exact thing that drives muscle and bone adaptation over time.

The honest answer is that Pilates and strength training do different jobs. Two to three strength sessions a week alongside your Pilates practice covers what Pilates cannot, and it does not require you to give anything up.

Why is everyone asking this question right now?

Pilates has been one of the most-booked class formats globally for several years now, and reformer studios have opened everywhere. At the same time, the conversation around women and lifting has gotten a lot louder, especially around perimenopause, bone density and muscle mass.

So people end up caught between two messages. One says low impact and controlled is the smarter way to train. The other says if you are not lifting heavy you are leaving results on the table. Both of those are partially true, which is exactly why it feels confusing.

The reality is that this was never an either/or. It just gets framed that way because it makes for better content.

What does Pilates actually do well?

Quite a lot, and it deserves credit for it.

Pilates trains deep core and trunk stability in a way that most strength programs skip. It improves body awareness and control. It builds mobility through the hips, spine and shoulders. Reformer work in particular provides real resistance through the legs, glutes, back and arms, and there is evidence that consistent reformer training improves upper body strength and endurance, along with meaningful improvements in mood and anxiety.

There is also good research showing Pilates improves balance in older adults, and balance is not a small thing. Falls are what break bones. Anything that reduces fall risk is doing real preventive work.

If you enjoy it and you are showing up consistently, that already puts you ahead of most people. Consistency is the variable that actually matters.

So what can't Pilates do?

Two things, mainly.

Progressive overload

Muscle adapts when you gradually ask it to handle more than it is used to. On a reformer, spring tension has a ceiling and it is not easy to increase in small, trackable increments the way you can by adding five pounds to a dumbbell. You can make Pilates harder through tempo, range and complexity, and skilled instructors do exactly that. But eventually the load itself becomes the limiting factor.

Bone loading

Bone responds to heavier loads and impact. There is a well-designed trial on this, the MEDEX-OP study, which put 160 postmenopausal women with low bone mass through eight months of twice-weekly training, comparing high-intensity resistance and impact work against a low-intensity Pilates-based program. The resistance and impact group came out ahead on spine bone density and on leg and back strength. That is not a knock on Pilates. It is just a different stimulus doing a different thing.

How much strength training do you actually need alongside Pilates?

Two sessions a week is the floor, and it is a real floor, not a consolation prize. Three is better if your schedule allows it. That is consistent with standard exercise guidelines for beginners, and it is enough to build strength without eating your whole week.

What matters more than the number is that the sessions are structured and that the load goes up over time. Two well-programmed full body sessions you actually complete will do more than four you plan and skip. We wrote more on that here: How Many Days a Week Do You Actually Need to Strength Train?

Do you have to lift heavy?

Heavy relative to you. Not heavy relative to someone on the internet.

The useful benchmark is that the last two or three reps of a set should feel genuinely hard while your form still holds. If you finish a set and could have done another eight reps, the weight is not asking anything of your body. If your technique falls apart at rep four, it is asking too much.

That range moves as you do. Which is the whole point.

This is also where coaching earns its keep. Knowing when to add load, when to hold steady and when to back off is not something most people can judge for themselves in the first year. It is not a discipline problem. It is a guidance problem. If you want a closer look at that, we covered it in Should Women Over 40 Lift Weights, or Stick to Walking and Pilates?

How do you fit both into one week without burning out?

You do less of each than you think.

A workable week for most people looks like two or three strength sessions and one or two Pilates sessions, with at least one full rest day. If you are currently doing five Pilates classes a week, you are not adding three strength sessions on top. You are swapping two of them.

Watch for the trap of treating strength as the "extra" that gets cut first when the week gets busy. It should be the anchor, with everything else built around it.

Something that fits into your life is always going to beat something that looks better on paper.

Where does this fit at KeepFit HQ?

Our classes are strength-based small group training, capped at twelve, with a trainer coaching the room the entire time. That cap is what makes it possible for someone to actually watch your hinge pattern and tell you it is time to go up a weight.

We are not a Pilates studio and we are not trying to be. Plenty of our members do Pilates elsewhere, and that combination works well. What we handle is the progressive loading side: Full Body, Upper & Core, Legs & Glutes, and Recovery classes that build on each other week to week.

If you want to see whether it fits, the 14-Day Unlimited Trial is the simplest way in. If you would rather start with one-on-one coaching before joining a class, personal training is available too.

At the end of the day, you do not have to choose. You just have to be honest about what each one is giving you.

Frequently Asked Questions

Can Pilates build muscle?

Yes, particularly for beginners and particularly through the core, hips and shoulders. It becomes harder to keep building once you adapt, because the load has a ceiling. That is when adding external resistance starts to matter.

Is reformer Pilates the same as strength training?

Not quite. Reformer work is resistance training, but the spring load is limited and difficult to increase in small measured steps. It is closer to strength training than mat Pilates, and still not a full replacement for it.

Will lifting weights make me bulky?

No. Building noticeable muscle mass takes years of dedicated training and deliberate eating. What most people notice in the first six months is feeling stronger, moving better and having more energy.

How long before I feel a difference from adding strength training?

Most people notice strength changes within four to six weeks, often before anything looks different. Everyday tasks like stairs, groceries and carrying kids tend to be where it shows up first.

Do I need to stop Pilates to start strength training?

No. Keep what you enjoy. Adjust the balance so strength gets two or three slots a week, and give yourself a rest day.