The phrase
"creaky knees" means that someone's knees make a squeaky or cracking sound when they move or bend them.
Full definition
Creaky knees ruled out jogging so I decided to start riding a bicycle to improve my fitness.
Over all, the latest research suggests that elliptical machines are a good choice for people
with creaky knees and the patience to master the machine's operations.
Aching legs,
creaky knees, and muscle injuries are common among the players of this great sports.
Consider enlisting a trainer to create a program designed around
any creaky knees or tight hips.
But when I began to explore more intensive meditation sessions, I discovered to my chagrin that years of sweaty vinyasa and mastery of fairly advanced poses hadn't made me immune to
the creaky knees, sore back, and aching hips that can accompany long hours of sitting practice.