I started running a few months ago, wearing an old pair of Addidas as my go to running shoe. I recently bought a brand new pair of Nike Trail running trainers to replace the running shoes and since then I've been plighted with pain in both balls of my feet. It sounds like Metatarsalgia. It seems to come on around 2.5km into my run and gradually worsens the longer I continue. The strange thing is that I've worn my running shoes for walks and had no such problem. My Addidas trainers were flat with zero cushioning (I don't think they were even running shoes) so I'm wondering whether this transition has something to do with it. I don't know what to do - it's been 6 weeks now. I've reduced the frequency I run as well as the duration but it doesn't appear to be getting any better. Tips and advice would be much appreciated!