stiff shoulder: 肩凝り

I have stiff shoulders today and a slight headache.
I don’t know why…
I haven’t exercised enough for a long time.
Of course, there is a chance that I often take a walk with my son.
However, it might be not beneficial for my health
because I need to stop walking whenever my son makes a side trip.

Ok, today, I will stretch my body and do some Yoga at home before I go to bed.
I hope my son won’t disturb me…