| Term | Definition |
| Excessive knee flexion during stance | weak quads, knee flexion contracture, heel cushion to hard, socket tilted anteriorly |
| Inadequate knee flexion during stance phase | socket tilted anteriorly, heel cushion soft, weak quads, anterodistal pain |
| Medial or lateral thrust at midstance | socket abducted/adducted, foot inset/outset to far |
| Drop-off or premature knee flexion in late stance | prosthetic foot is to short |
| delayed knee flexion during late stance; patient feels liek they are walking uphill | prosthetic to long |