Hi Dave a very good question indeed, I personally wear Adidas weightlifting shoes (adiStar released for the Athens Olympics) and encourage all of my heavier lifters to wear similar, we then take them off and wear a cross trainer preferably or a running shoe to do the contrast jumping movments, I would be interested to hear what others are doing, I am very much of the belief of specialisation of shoes and hate seeing players lift in running shoes, if you can not afford weightlifting shoes then next option on my list would be basketball shoes, my preference the adidas T-Mac range is superb and then next a cross trainer, Impossible is Nothing, ash