Ground reaction forces

Shawn said:

Does anyone teach the front leg drives the hips open, GRF, so the GRF snaps the hips open?

Or does anyone teach like Epstein's the front leg triggers the swing/hips?

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FiveFrameSwing said:

Within reason, one could make an argument for both stances.

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Shawn said:

I agree. I found that proper back leg/hip action creates good front leg/hip action.

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FiveFrameSwing said:

Using the clip below, can you describe what you consider to be "proper back leg/hip action"?

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Shawn said:

5frames,

Proper back leg action, supports the torso action and doesn't create the torso action that is being taught by some.

Back leg action, screwing the leg into the ground to support the hip action and stabilizing the hip. Weight gets back as a result, onto the back heel. Then the lower back arches bringing the hip/back leg into the swing creating internal rotation. The spine/torso engine run the show and not the back leg.

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Rolling Hard said:

There are lots of different muscles employed in order to swing a bat. And the order in which these muscles fire and the emphasis on which muscles are dominate can be different for different hitters. Which muscles are driving and which ones are assisting can vary. Then you get into what the hitter "feels" they are doing and now it is another can of worms. Justin Stone talks about no cookie cutter approach. He is doing mobility and strength testing on his students to see what swing is best for them and also create a exercise program specifically designed to work on the students weaknesses. Think it $229. He says most youth hitters lack abs and lats strength. Think he might be right.

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FiveFrameSwing said:

Using the clip below, can you describe what you consider to be "proper back leg/hip action"?

Click to expand...