I've had some neck/shoulder and back problems. I began hiking last year to get in shape, but I still can't carry a big load.. only basics; like water, survival and med kit, snacks and some spare clothes. I'm also seeing a physiotherapist.. I would like some excercises that would help carry more weight in my pack. My first thought was to make homemade sandbags which would get progressively heavier.. Do you have any other suggestions; excercises, stretches, etc... I can run by her?

Thanks,
Geoff