There are many organisations who can help provide more information about bladder weakness and some of the contributory factors (as well as assist with other health and wellbeing information relating to ageing).
Listed below are links to a few of them.

Feel free to look at their websites and contact them if you think they might be helpful.
Bladder weakness can be a complex issue and the more insights and knowledge we all have the better we can manage our own health and the health of those we care for.

Please note though, Cottons is not a medical body, so if you have any questions or concerns that might be best answered by a medical specialist, do not hesitate to talk to your GP or a continence or other qualified health specialist.