The Science Behind Pilates & Lagree Fitness

Published on April 5, 2022

Updated on June 17, 2026

By Mirjana Dobric

Lagree looks deceptively simple from the outside. Slow movements, a low machine, no jumping or heavy weights. Then your muscles start shaking and you realize something very different is happening. That slow pace is not a limitation. It is the mechanism. Every deliberate, sustained movement is designed to trigger a specific physiological response, one that goes deeper than most workouts can reach.

This article breaks down the exercise science that makes Lagree one of the most effective resistance methods available, from its Pilates roots to time under tension, EPOC, and what actually happens to your body over weeks of consistent training.

What Is Pilates, and How Did Lagree Evolve From It?

Pilates began in the early 1900s with Joseph Pilates, originally called "Contrology." Built to improve strength, flexibility, and well-being, it gained global recognition for its rehabilitative and postural benefits. (1) Today more than 12 million people practice it worldwide, using equipment like the Reformer, a spring-based platform that targets stabilizing muscles, particularly in the core. (2)

In 1998, personal trainer Sebastien Lagree began adapting the Reformer concept by layering in bodybuilding principles, greater resistance, and higher muscular demand. That evolution produced the Megaformer, the machine at the center of every Lagree class today. The Megaformer is not a Reformer. Its spring resistance system, moving carriage, and multiple cable attachments allow for complex, full-body movements at a slower, sustained tempo. Where the Reformer guides contained movements, the Megaformer creates instability that demands constant muscular engagement across the entire body, which is why Lagree produces different results.

The 5 Science Principles Behind Lagree

Lagree is built on five interconnected principles that work together to maximize results while protecting the body.

• Effective resistance: Adjustable spring resistance maximizes muscle effort without straining joints, drawing on the proven benefits of variable resistance training. (8)
• Effective range of motion: Controlled movement through a targeted range recruits muscle groups more precisely and reduces compensation patterns. (9)
• Effective angle: The Megaformer's design ensures optimal resistance angles, enabling multi-muscle engagement with each exercise.
• Effective tempo: Slow, continuous movements keep muscles under sustained load, activating slow-twitch fibers and triggering deeper metabolic demand. (10)
• Effective duration: Longer sets challenge both fast-twitch and slow-twitch fibers, building strength, stamina, and calorie burn simultaneously.

No single element is the secret. The combination is.

Time Under Tension: Why Slower Means More

Time under tension, or TUT, refers to the total time a muscle works against resistance during a set. In conventional training, a movement might take two seconds each way. In Lagree, that same movement takes four to six seconds each way with no rest between. That difference matters enormously at the cellular level.

The longer a muscle is under load, the more motor units are recruited to sustain the effort. Without momentum to fall back on, your body has to engage more muscle fibers to maintain control. This drives deeper neuromuscular activation, greater metabolic fatigue, and a stronger stimulus for adaptation and hypertrophy. The shake you feel mid-exercise is not weakness. It is your muscle fibers reaching their recruitment ceiling.

Slow-Twitch Muscle Recruitment and the Lagree Endurance Effect

Muscle fibers come in two primary types. Fast-twitch fibers produce powerful, short bursts of effort and fatigue quickly. Slow-twitch fibers are built for sustained effort, endurance, and fatigue resistance, and they are more metabolically active over time, playing a significant role in lean muscle tone and energy efficiency.

Traditional weight training with heavy loads and short sets primarily targets fast-twitch fibers. Lagree, through sustained tempo, extended set duration, and spring resistance, deeply fatigues slow-twitch fibers while recruiting fast-twitch fibers as fatigue accumulates. This is why Lagree results look and feel different. Clients develop endurance, functional strength, and lean tone rather than bulk, and that carries over into everyday energy and stamina.

EPOC: Why You Keep Burning After Class Ends

One of Lagree's most underappreciated benefits is what happens after you leave the studio. EPOC, or excess post-exercise oxygen consumption, is the elevated metabolic rate your body maintains for hours after an intense session as it restores oxygen levels, repairs muscle tissue, and clears metabolic byproducts. (11)

Often called the afterburn effect, EPOC is more pronounced with resistance-based training than with steady-state cardio. Because Lagree places significant demand on multiple large muscle groups simultaneously and sustains that demand across an entire class, it triggers a meaningful EPOC response. Your metabolism stays elevated long after your session ends, making Lagree particularly effective for body recomposition, where in-class burn and post-class metabolic elevation compound over time.

Is Lagree Better Than Pilates? What the Science Suggests

Neither method is universally better. They are built for different goals.

Pilates is exceptionally well-suited for rehabilitation, postural correction, flexibility, and foundational movement control. Research supports its benefits for reducing back pain, building core strength, improving mobility, and even supporting cognitive function. (2,3,4,5,6,7) For someone recovering from injury or establishing a movement base, it is a highly effective tool.

Lagree is built for body recomposition, metabolic conditioning, muscular endurance, and cardiovascular challenge. The intensity is higher, the muscular demand is greater, and the EPOC effect adds a dimension that Pilates does not provide. For clients seeking visible muscle tone and faster body composition changes, Lagree offers a more potent stimulus. The two methods can also complement each other well, with Pilates supporting mobility and recovery while Lagree drives strength and metabolic adaptation.

What Happens to Your Body After 4, 8, and 12 Weeks of Lagree?

Lagree results follow a predictable physiological progression. (12)

Weeks 1 to 3: Neuromuscular Adaptation. The most significant early changes happen in your nervous system, not your muscles. Your body is learning to recruit more fibers more efficiently. Coordination improves, movements feel more controlled, and the shake starts to feel familiar rather than alarming.

Weeks 4 to 8: Strength, Endurance, and Postural Shifts. Genuine strength and endurance gains emerge. Muscles that were struggling to complete sets are now sustaining effort longer. Clients often notice postural changes as the deep core and stabilizing muscles Lagree targets begin influencing how the body holds itself during everyday activities.

Weeks 8 to 12 and Beyond: Visible Recomposition and Metabolic Gains. This is when the results most people come to Lagree for become consistent and visible. Lean muscle tone increases, body composition shifts, and the sustained EPOC effect from regular training contributes to an elevated baseline metabolic rate. Clients who train through this window often describe a meaningful change in how their body looks, moves, and feels.

Experience the Science at Lagree Fit 415

Lagree is not a trend built on aesthetics. It is a structured application of resistance science. Every element of a class, the tempo, the machine, the spring tension, the duration, is there for a specific physiological reason. The slow movements are the point. The shake is the point. The sustained effort is exactly what makes it work.

Ready to experience the science for yourself? Book a class at Lagree Fit 415 and feel what time under tension actually does to your body.

‍

References:

1. Byrnes, K., Wu, P. J., & Whillier, S. (2018). Is Pilates an effective rehabilitation tool? A systematic review. Journal of Bodywork and Movement Therapies, 22(1), 192-202.
2. Kloubec J. (2011). Pilates: how does it work and who needs it?. Muscles, Ligaments and Tendons Journal, 1(2), 61-66.
3. Bernardo, L. M. (2007). The effectiveness of Pilates training in healthy adults: An appraisal of the research literature. Journal of Bodywork and Movement Therapies, 11(2), 106-110.
4. Kulkarni, M., Saini, S., Palekar, T., & Hamdulay, N. (2020). Effects of pilates on core muscle strength and endurance in post 6 months delivered women. Proteus J, 11(8), 136-151.
5. Krawczky, B., Mainenti, M. R. M., & Pacheco, A. G. F. (2016). The impact of pilates exercises on the postural alignment of healthy adults. Revista Brasileira de Medicina do Esporte, 22, 485-490.
6. García-Garro, P. A., et al. (2020). Effectiveness of a pilates training program on cognitive and functional abilities in postmenopausal women. International Journal of Environmental Research and Public Health, 17(10), 3580.
7. Cruz, J. C., et al. (2016). The Pilates method in the rehabilitation of musculoskeletal disorders: a systematic review. Fisioterapia em Movimento, 29, 609-622.
8. Soria-Gila, M. A., et al. (2015). Effects of variable resistance training on maximal strength: a meta-analysis. The Journal of Strength & Conditioning Research, 29(11), 3260-3270.
9. Valamatos, M. J., et al. (2018). Influence of full range of motion vs. equalized partial range of motion training on muscle architecture and mechanical properties. European Journal of Applied Physiology, 118(9), 1969-1983.
10. Pendergast, D. R., et al. (1996). The role of dietary fat on performance, metabolism, and health. The American Journal of Sports Medicine, 24(6_suppl), S53-S58.
11. Borsheim, E., & Bahr, R. (2003). Effect of exercise intensity, duration and mode on post-exercise oxygen consumption. Sports Medicine, 33(14), 1037-1060.
12. Hecksteden, A., et al. (2013). Individual response to exercise training: a statistical perspective. Journal of Applied Physiology, 118(12), 1450-1459.