This glitch (via Xbox Player xXxQUAKERxXx) allows Strikers to Shoulder Charge instantly after sprinting for only a second.
How to do this glitch:
"Sprint, Shoot, Crouch, Melee
If you do those 4 things fast enough, you can Shoulder Charge after sprinting for only a second or less. You can even run around the entire map and Shoulder Charge at the other end of it. It doesn't matter where you start your sprint. It's the Shoot, Crouch, Melee that activates the Shoulder Charge."
Video via xXxQUAKERXxX