In through your nose, out through your mouth unless otherwise directed.
You need to talk to your doctor about it.
Essentially, The Pilates Method main focus is on the core or powerhouse which are made up of the abdominal muscles, lower back, and pelvic region. However, Pilates does not stop at core work alone. Structural integration, and learning to create a flexible, strong body that can move freely and efficiently are important goals of The Pilates Method. By focusing on breathing, spinal and pelvic alignment, and developing a strong core The Pilates Method helps to improve overall coordination and balance. When practiced regularly The Pilates Method tones, elongates, strengthens, improves flexibility, balance and concentration while decreasing aches and pain in the body.
No! Pilates and Yoga are not the same. Yoga is a spiritual exercise with slow movements that get held for a longer period of time. Pilates focuses on the mind/body connection (but not in a spiritual way) and is done at a flowing, faster paced. Some of the exercises are similar but the bulk of the exercises are very different.
During the active stretching period, the client performs the stretches while the instructor watches their form and breathing. These exercises warm up the muscles in preparation for the machine work.