This is ridiculous and is yet another case of health and safety gone mad.
Heaven knows how any of us grew up in the past and managed to survive. We would walk to school in rain and snow, even in the dark

We rode our bikes to school without a helmet or hi-vis

We played games in the playground that would involve falling over or banging into things (how we managed to do this in the rain or snow I don't know

). We left the school premises to go to the shop at break times

We ate crisps, chocolate and sweets

Most of us should never have reached puberty.
Back then all the kids used to be fit apart from the odd fat kid that would get picked on. I go past schools these days and there are more fat kids than fit ones. There are more school run mums sat outside picking up kids than there are kids walking home

Then they wonder why obesity figures are going through the roof
