The ultimate goal of both sessions is, in effect, to retrain the brain – to establish new neural pathways that result in easy, simple movements that are physiologically effective and comfortable. Although the Feldenkrais method was developed in the mid-20th century, neurophysiologists have since demonstrated the plasticity of the brain, its ability to form new cells, reorganize itself and, in effect, learn new ways to do things.

The beauty of Feldenkrais lessons is that they are both relatively low-cost (group classes average $15 to $25, individual sessions $100 to $200) and potentially accessible to nearly everyone. There are more than 7,000 teachers and practitioners working in 18 countries, including large numbers in the United States. You can be any age, strength, fitness level and state of well-being to participate. The exercises are slow, gentle and adjustable to whatever might ail you. Their calming effect counters the stress that results in contracted muscles, tightness and pain.

Many Feldenkrais practitioners, like Marek Wyszynski, director of the New York center, start professional life as physical therapists, although many other practitioners begin with no medical background. They then undergo three and a half years of training to become certified in the Feldenkrais method.

Mr. Wyszynski explained that he starts by observing how patients are using their skeletons – how they sit, stand and walk in ways that may cause or contribute to their pathology, be it spinal disc disease, arthritis, shoulder pain or damaged knee joints. In accordance with Dr. Feldenkrais’s astute observation, “If you don’t know what you are doing, you can’t do what you want,” patients are then given a clear sensory experience of how their posture and behavior contribute to their pain and physical limitations.

For example, some people may use excessive force, clench their teeth, hold their breath or rush, causing undue muscle tension and skeletal stress. Years ago, I realized that my frequent headaches resulted from an unconscious habit of clenching my jaw when I concentrated intently on a task like sewing or cooking. Feldenkrais teachers do not give formulas for a proper way of behaving; rather, they rely on their patients’ ability to self-discover and self-correct.

Once aware of their counterproductive habits, students are given the opportunity to experience alternative movements, postures and behaviors and, through practice, create new habits that are less likely to cause pain.

Mr. Wyszynski told me that there are more than 1,000 distinct Feldenkrais lessons currently available, most of which involve everyday actions like reaching, getting up from a chair, turning, bending and walking.