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Changes his action should be avoided [unless its "mixed"]
Run up with youngsters should be reassessed in pre season [as a minimum] EVERY season.
The reason is simple / obvious, as they grow bigger and stronger, so their stride will lengthen - usual sign is increase in f/f no-balls.
I use the Dennis Lillee method to establish - needs to be 1-2-1 or 2, 3 max.
Get them to run up and bowl, starting on the popping crease, running away from the wicket [must be fully warmed up first so that running stride has reached optimum - ground must be flat too].
Ask them to do this with eyes closed and no ball in hand, just using mental visualisation of delivery.
Coach to drop a golf-tee down where their f/f lands.
Player keeps doing this until they've achieved consistency to get 6 tees within the spread of your hand [about six inches]
Translate that marker to align to a straight approach to an over the wicket delivery point runnning back the other way [normal direction].
Next get them running in to bowl [eyes open, ball optional] from this marker observing f/f / popping crease position - anywhere between toe and foot arch breaking the crease is fine but I wouldn't want it to be the back half of the foot [to close for growth].
Again repeat until consistency is apparent and rhythm is present
Introduce a ball and place a cone on the ideal pitch-point
Check for speed and accuracy
Check for follow through
Usually takes 45 mins per players but I only do this with the frontline seamers - 4 or 5 max
Repeat next pre-season or with new players or if persistent f/f no-ball arises
Last and most important piece - from the bowling crease, get them to mark out distance using normal steps so that they can consistently put down their bowling marker in the correct / same place. For bowlers with a long run up this is harder - I carry a builders 30 metre tape measure in my coaching bag and we can measure it out before play and pop a golf tee in the ground - helps with confidence and consistency.
The key is that the bowler MUST feel comfortable in their run up - this will take out all the issues arriving in to the delivery stride, freeing their mind to concentrate on the tactics of each delivery.
Good luck ...
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I'm off to coach in Uganda in April '13 but must first raise £750 for the Cricket Without Boundries charity - your donation here would be very much appreciated.
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