How a reformer works
A reformer is a bed-like frame with a sliding carriage, adjustable springs, straps and a footbar. You push or pull against spring resistance while the carriage moves, so each exercise asks you to control both the effort and the return. Heavier spring settings generally add resistance, though some moves get harder with lighter springs because stability becomes more demanding.
Main benefits
Strength with control
The springs provide resistance for the legs, hips, back and arms. The moving carriage means you cannot simply muscle through a rep. You have to manage speed and position, which is why many people feel their first class in muscles they did not expect.
Core and trunk stability
Many reformer exercises keep the trunk working to hold a stable position while the limbs move. Sources often point to deep stabilizing muscles such as the transverse abdominis and pelvic floor. It may demand more from them than basic crunches, though the evidence comparing specific exercises is limited.
Mobility and flexibility
Exercises commonly move you through a full range of motion under tension, which combines strengthening with stretching. This can help hips, hamstrings and shoulders feel less restricted.
Joint-friendly training
Because many moves are done lying, seated or kneeling, and the springs provide smooth resistance, the reformer is low impact. This makes it popular for people who want to train with less joint stress, though anyone with an injury should follow guidance from a clinician.
Posture and alignment
Instructors usually cue alignment and breathing, so people tend to become more aware of how they hold and move their bodies.
Balance and coordination
The moving carriage adds an element of instability that trains coordination, particularly on single-leg and standing variations.
Limits and downsides
- Strength ceiling. Spring resistance can be demanding, but it is harder to increase in small steps than adding weight to a barbell, which is the core idea of progressive overload. If your main goal is maximum strength or muscle size, a lifting program usually offers more room to progress. See our comparison of Pilates and the gym.
- Cost and access. Studio sessions are usually pricier than a gym visit, and home reformers are a significant purchase.
- Instructor quality. Experience and group size affect how much feedback you get.
- Cardio. Most classes do not replace aerobic exercise (see the best cardio to do in the gym). Some faster-paced variations exist; see whether Lagree counts as strength training.
Does it change your body shape?
Regular strength training of any type can change how muscles look over time, and reformer work may increase muscle tone in the legs, glutes, back and shoulders. Visible change depends on your starting point, diet, other activity and genetics. Be cautious of promises of a specific “Pilates body” in a set number of weeks.
How long until you notice results?
Many people say they feel better control or less stiffness after several sessions, and notice firmer or stronger muscles after a couple of months of consistent practice. Treat these as rough, individual timelines rather than guarantees.
Reformer versus mat
| Mat | Reformer | |
|---|---|---|
| Resistance | Bodyweight, small props | Springs, adjustable |
| Cost | Low | Higher |
| Progression | Harder variations | Spring changes plus variations |
| Support | Less assistance | Can assist or challenge |
Both build the same core principles. Mat work is cheaper and easy to do at home. The reformer offers more variety of resistance and support. Short mat routines can still be effective, as covered in whether 10 minutes of Pilates a day is enough.
How often should you use a reformer?
Many beginners start with one or two sessions a week and build up as they recover well. Two to three sessions weekly is common for people who want steady progress, often alongside other training. If you also run or play sports, see how Pilates fits as cross training.
Is reformer Pilates actually good exercise?
Yes, it is a legitimate form of resistance training that emphasizes control, with low impact. It is best viewed as one part of a broader routine that also includes some cardio and, if relevant to your goals, heavier strength work.
Getting started
- Choose a beginner or foundations class.
- Tell the instructor about injuries, pregnancy or medical conditions.
- Wear fitted clothing and grip socks.
- Focus on learning the setup and breathing before chasing heavier springs.