I am having a problem trying to dismount my bike...

I guess my 70 year joints are not quite as flexible as
they used to be.

I don't seem to be able to lift my right leg as high as
I would like to make a clean dismount from my bike.

Even mounting the bike I have to tilt the bike a good
bit to get the old leg over the saddle.

Does anyone know of any exercises/stretches that
could make my hips a bit more flexible?

Thanks,

Jerry