I've not been very mobile since Christmas- I've been shielding so reluctant to go out, spending long hours sat at my computer for work etc.
I've now found that, now I'm trying to get back to normal by doing the school run etc, my back hurts a lot after only 5-10 minutes of walking. I have a history of back/disc issues, so am worried about this.
How can I build up strength & protect my back?