Prerequisites of Gait: Perry

Gait Cycle: 60% stance, 40% swing

Despite all that has happened with my P&O experience I still enjoy gait analysis. Many enjoy people watching, but to analyze their gait pattern brings people watching to a whole new level. You can even try to analyze their gait deviation and possible causes. Not everyone walks well, both the young and old. Most useful of criteria are the prerequisites of proper gait by Jacquelin Perry. Also useful are the determinants of gait.

Prerequisites of Proper Gait: SCASC

1. Stability in stance
2. foot Clearance during swing
3. Appropriate prepositioning during swing
4. adequate Step length
5. energy Conservation

Six Determinants of Gait

1. pelvic rotation (transverse): rarely exceeds 5% or 3/8″
2. pelvic tilt (vertical, frontal): rarely exceeds 5% or 3/16″
3. lateral pelvic motion (medial/lateral): displacement of 2″
4. knee flexion at IC/MSt: peak to trough 7/16″
5. knee motion
6. foot and ankle motion

Impulse of Force
f bar = (MV’ – MV) / delta t; The faster your decelerate given a set speed the higher the resulting force.

Yes, it’s all babble, but I find it interesting if not useful.