I’m a huge fan of rebound nets for self reliant individual or paired practice when working with keepers and fielders. The Crazy Catch helps sharpen reactions, builds technique and can be used to unlock movement patterns.
One of the most common pieces of advice from top bowling coaches is to learn to "brace the front leg". But that's a technical term, and it's not obvious to everyone what it means, or how to do it. So, here are more details about how and why you brace the front leg to bowl fast.
Wouldn't it be handy to know the exact natural spell of every bowler? As a captain, coach or even bowler, you will be able to use your best time, and rest when you know you are tiring. Every bowler - no matter how fit - has a natural spell length.