Exercise

Jackknife Sit Up

Name: Jackknife Sit Up
Uploaded: 2018-06-23T22:09:36.641Z
Description: The Jackknife Sit Up is an isolation exercise that primary targets your abs. It does not require any equipment. You can do it at the gym or at home.

The Jackknife Sit Up is an isolation exercise that primary targets your abs.It’s a strength exercise that uses push force.