getting injured whilst doing nothing ?

So i was a gym regular before lockdown... since then i have had zero exercise beyond walking and a bit of light cycling recently but for a few months there was nothing.

And in this time ive developed lower back pain/hip.... and what appears to be achillies tendonitis as i have sharp pain in the achilles area...

is it possible these injuries pre existed lockdown but are only becoming apparent now tht im no longer active ?