In the 1930s, a physician and yoga teacher named Tirumalai Krishnamacharya was running a yoga school in the palace of the Maharaja of Mysore. One of his early students was his own nephew, B.K.S. Iyengar who was sixteen years old, chronically ill, malnourished, so weak he couldn't hold a standing position without shaking. By any standard diagnostic for the practice, Iyengar was not a candidate for yoga.

Krishnamacharya gave him a practice anyway. Not the practice he gave the strong students. A practice designed for a sick, stiff, depleted body. Modified positions. Long holds. Supported shapes. A sequence that met the student where he was. His principle stated explicitly in his teaching and repeated throughout his life was that the practice must be adapted to the individual. Not the individual to the practice.

Iyengar went on to practice for eight decades and become the most influential yoga teacher of the 20th century, with students on six continents. His first years of practice were propped, modified, and accommodated. He never waited until he was ready. He started.

The Yoga Sutras use three words to describe what a posture should feel like: sthiram sukham asanam. Stable. Comfortable. Posture. Not deep. Not impressive. Not anything that requires a particular body to achieve. Stable and comfortable, in whatever shape you can currently hold for five full breaths without tension. That's it. That's the definition.

The flexibility framing is a Western gym category applied to a practice that wasn't built around it. The original function of the asanas as Krishnamacharya taught them, as Iyengar developed them was to create a body that could sit in meditation for long periods without pain. That required a supple spine and open hips, yes. It also required structural stability, proprioceptive awareness, and the ability to breathe fully in a static position. None of those things require you to touch your toes first.

What happens in the body when you practice before you're "ready."

Range of motion is a neuromuscular phenomenon, not purely a structural one. Your nervous system is making real-time decisions about how far a muscle can lengthen based on its read of threat and safety. When you try to force a stretch, the nervous system responds with a protective contraction. When you hold a gentle stretch with slow breathing for an extended time, the nervous system gradually updates its threat model and allows more length. Forcing gets you nowhere. Patience gets you there.

The connective tissue - tendons, ligaments, fascial layers responds to load at low intensity over time. It takes weeks to months to adapt. You cannot accelerate this by pushing harder. You can only show up consistently. The stiff person who practices moderately every day for six months will outperform the person who occasionally forces themselves into deep poses. Krishnamacharya understood this. He called it krama which means sequential, graduated progression.

The practical implication: the only contraindication for starting is active injury requiring rest. Everything else is a reason to modify, not a reason to wait. Do the shapes you can actually hold. Breathe fully in each one. Come back tomorrow. Come back the day after that.

Stiffness is not a disqualification. For Krishnamacharya, it was the reason to start. The body you have right now is the body the practice is designed for.