Breaking in a new pair of running shoes?

Got a new pair yesterday and used them at the gym today – just walking on the treadmill. They seem to have support in different places than my old shoes and my feet were hurting (kinda like crampy feeling) from them. Is this something that will go away – I will get used to the new shoes – or a sign that this is a bad pair. They fit great otherwise.

What can I do to avoid/prevent feet blisters on new running shoes I’m breaking in? Also use support soles?

I just got a “new” pair of running shoes that I just began to break in (it was given secondhand after it didn’t fit well w/ the previous owner). The size is a little bigger than my usual shoe size but given thats its a running shoe, its much narrower. I also bought some support soles on the salesperson’s suggestion – I don’t know if that might be an inadvertent cause of the blister. Right foot/shoe feels great and no problems – its the left foot that has a blister. Not too familiar w/ the differences of foot pronation/supination (my feet are medium-high-arched) so I don’t know if that’s a blister factor. I feel its too early to give up on these shoes though I will look around and consult on recommendations for other pairs. So while breaking it in and bearing out these shoes – any suggestions/experiences to help prevent/avoid/treat blisters and new running shoes?

What is a good supportive, firm running shoe to wear after breaking a foot?

I recently broke my foot, and am in an air cast. I am told that in a few weeks i can wear running shoes (for short periods of time) if they are very firm, have lots of support, and control motion. I have high arches, narrow feet and my newest running shoes are eight years old. i have no idea what to get. Somebody please make a suggestion.?