- Jul 29, 2013
- 1,200
- 63
Locking out the front leg happens because the leg is extended , driving the front hip rearward. This is how good hitters rotate their pelvis and create power from the ground up.
The hitter strides into the front leg, loading the muscles of the leg (Stretch Shortening Cycle), extends the front leg, driving the pelvis rearward from a point offset from center mass, creating torque and that causes rotation.
The leg is locked out (extended) and, if the rotation continues, the leg flexes again as the pelvis unloads it, the leg is dragged and draws back into the core....much the way a sprinter's leg extends and then is dragged by the forward movement of the sprinter.
The first video you posted shows your dd not completely rotating...IMHO because she doesn't drive her rotation from her leg (front). In the second video, she rotates a little more because she gets her leg locked (extended) but a bit passively. Try having her actively drive her front hip rearward by extending the leg....push against the front leg.
The rearward tilt she has is a bonus in that she can really get against the front leg and create lots of torque against her pelvis.
Lots of folks talk about turning against the front leg creating knee issues. Solve that by having her open the front leg, pointing her toes at the pitcher. Then the rearward thrust is aligned to direction of movement (hip over knee over toes) and there is no torque on the knee.
The hitter strides into the front leg, loading the muscles of the leg (Stretch Shortening Cycle), extends the front leg, driving the pelvis rearward from a point offset from center mass, creating torque and that causes rotation.
The leg is locked out (extended) and, if the rotation continues, the leg flexes again as the pelvis unloads it, the leg is dragged and draws back into the core....much the way a sprinter's leg extends and then is dragged by the forward movement of the sprinter.
The first video you posted shows your dd not completely rotating...IMHO because she doesn't drive her rotation from her leg (front). In the second video, she rotates a little more because she gets her leg locked (extended) but a bit passively. Try having her actively drive her front hip rearward by extending the leg....push against the front leg.
The rearward tilt she has is a bonus in that she can really get against the front leg and create lots of torque against her pelvis.
Lots of folks talk about turning against the front leg creating knee issues. Solve that by having her open the front leg, pointing her toes at the pitcher. Then the rearward thrust is aligned to direction of movement (hip over knee over toes) and there is no torque on the knee.