I suffer from this

YouTube suggested the following video to me
https://www.youtube.com/watch?v=ML1Yw46EmiU
and it coincides with my own experience on exercises that make it worse.
You can also do push ups on your knees and planks with your feet on a rung (the rung should have a mat on top of it) or on a bench.
Any machine where your foot impacts the treadmill etc. also makes it worse, whereas machines where your feet never leave the pedals is better.
Finally, carbon soles are great and on Ali Express, you can pick them up at around half the price of those on Amazon.
Even if you don't suffer from this condition, think that you might in 10 or 20 years, so start some prevention now.
Does anyone else who has Hallux Rigidis have any tips?
Regards