Let me through, Im a paediatric physio!
Seriously, looks like mamma2kids beat me to it with the sensible advice. I might be letting out trade secrets here, but tbh 5 mins of stretching wont stop contractures from developing, but then neither would 5 hours.
The research says that a muscle needs to be put under stretch continuously for 6-8 out of every 24 hours to maintain muscle length or possibly increase it. So the only thing that will do that is serial casting or AFOs/splints etc.
But I would alweays recommend a stretching regime, for the following reasons:
It gets your child used to being handled that way in for when professionals do it.
It gets you used to how your child's muscle tone/range of movement feels, so you can alert your physio if you think they have tightened up.
When you go to orthopaedic clinic and the surgeon with nil bedside manner asks you what stretches you sre doing, you can show him that neither you nor your physio are idiots
Older children can take responsibility for their own stretches sometimes, as lonng as they can understand how to do the techniques.
There is no point in feeling guilty about trying and sometimes failing to fit it all in. I know as a NHS physio I cant do all the treatment for any of the kids I see, it has to be the family's responsibity as well. But there are ways to make it more fun- horse riding can help stretch the hips for example, positioning in standing frames and the like also reduce the risk of contractures. Problems like dislocating hips can occur even when stretches are done religiously, so there is no point in beating yourself up over it.
Best thing is to always ask your physio why they are doing things - we have a tendency to assume that if no questions are asked, then it has all sunk in - I know with hindight that this is often not the case!
But as a mother I know only too well how difficult it can be even to fit a reading book into a normal day, so if you have physio, Ot, SALT, Portage etc, no one is going to blame you if you ask what needs to be done as a priority.
By the way, twoisplenty, sorry to hear you have a scary physio... hope it isnt me!