I've fallen over a few times in the last year, quite heavily. My ankle turns over and down I go, forwards. My ankles are sore and swollen for a couple of weeks afterwards. I'm wearing boots, usually with a couple of pairs of socks to try and provide support. I'm a little overweight and asthmatic but keen to get outdoors for more excercise. I gym and swim twice a week. What else can I do? Do those walking poles help, or should I get a stick?