[More background to the LegSpin Horror Epic. Similar disclaimers as to lack of coaching yadayada.]
If you've read Body Pivot - Why? and are convinced (or intrigued), have a look at my bit of badly remembered 1st year university physics in the post 'rotary motion'.
Now imagine viewing a bowler in the delivery stride from above. We want him or her to pivot, for reasons outlined elsewhere. Now clearly we can achieve this if the bowler pushes with extra force with the back foot/right hand side of the body, to make that part 'move ahead', on top of the overall linear momentum from the run up.
However, we can also achieve the same rotary sense by pushing *back* with the front foot and left hand side of the body, since you are already moving forward as you run in. Try running in hard chest on without a ball and just jumping and trying to stop with your left foot; literally slam on the brakes. You will find, as your right hand side keeps going and your left foot tries to stop, that you naturally swing round.
I think that this is one reason for bowling over a 'braced front foot' as it is often described - although you also want to be tall, the very act of trying to get tall and spending time on the front foot will cause you to pivot.
Now, the more momentum from your run up, the more easily you can rotate just by bracing over the front foot. The slower you run in, the more your back foot has to do to create drive to get you round.
If you've read Body Pivot - Why? and are convinced (or intrigued), have a look at my bit of badly remembered 1st year university physics in the post 'rotary motion'.
Now imagine viewing a bowler in the delivery stride from above. We want him or her to pivot, for reasons outlined elsewhere. Now clearly we can achieve this if the bowler pushes with extra force with the back foot/right hand side of the body, to make that part 'move ahead', on top of the overall linear momentum from the run up.
However, we can also achieve the same rotary sense by pushing *back* with the front foot and left hand side of the body, since you are already moving forward as you run in. Try running in hard chest on without a ball and just jumping and trying to stop with your left foot; literally slam on the brakes. You will find, as your right hand side keeps going and your left foot tries to stop, that you naturally swing round.
I think that this is one reason for bowling over a 'braced front foot' as it is often described - although you also want to be tall, the very act of trying to get tall and spending time on the front foot will cause you to pivot.
Now, the more momentum from your run up, the more easily you can rotate just by bracing over the front foot. The slower you run in, the more your back foot has to do to create drive to get you round.
