How do you introduce a wild horse to a rider's weight for the first time?

Introducing a wild horse to a rider's weight is a progressive process that begins well before anyone swings a leg over, with a specific sequence of preparations that familiarize the horse with the pressure, position, and movement of a rider's body at incrementally increasing intensity. The sequence typically begins with the trainer leaning over the horse's back from the ground — placing hands on the horse's back, then applying increasing weight through the hands while watching the horse's response — before progressing to placing weight in the stirrup. The stirrup weight phase is critical: standing beside the horse and placing the foot in the stirrup, bouncing lightly while watching the horse's response, then placing increasing amounts of body weight into the stirrup while remaining ready to step back down immediately at any sign of significant tension. This phase should be done from both sides across multiple repetitions and multiple sessions before any attempt to swing the leg over. The first leg-over attempts are best done with a helper holding the horse's head — not to restrain it forcibly but to provide a familiar ground presence that grounds the horse while the novel experience of weight overhead is introduced. The leg-over itself should be smooth and slow, with the rider resting their belly across the saddle for multiple sessions before actually sitting upright in the seat, because the weight distribution of a rider lying across the saddle differs from sitting upright and each position must be habituated separately. Throughout each step, the horse's body language is the primary guide — tension in the topline, a raised head, fixed eyes, or held breath are signals to pause at the current level rather than advance, while soft muscles, normal breathing, and mobile ears indicate genuine acceptance of the current phase and readiness to progress.