instep

n.

脚背，脚背形的东西；

复数：insteps

1. Lie on his back on the floor, double leg stretchs tight straight, instep bends.
   仰卧在地板上，双腿绷直，脚背弯曲。
2. Meanwhile, Alonso suffered discomfort after what was his first start since requiring seven stitches on his instep on Monday.
   同时，在周一踢完埃弗顿的比赛后，脚背缝上七针的阿隆索感到脚部的不适。

The instep island flap to resurface plantar defects
Impact phase kinematics of instep kicking in soccer
The instep of the foot as a fasciocutaneous island and as a free flap for heel defects
Kinematic instep kicking differences between elite female and male soccer players.
Segmental dynamics of soccer instep kicking with the preferred and non-preferred leg
Comparison of the kinematics of the full-instep and pass kicks in soccer.
Biomechanical characteristics and determinants of instep soccer kick.
Three-dimensional kinetic analysis of side-foot and instep soccer kicks
The effect of muscle fatigue on instep kicking kinetics and kinematics in association football
Full-body kinematic characteristics of the maximal instep soccer kick by male soccer players and parameters related to kick quality.