You might start to notice it as early as your thirties: the dull knee aches when the weather changes, the morning stiffness when you get out of bed. These are all unwelcome signs that your knees are not quite the well-oiled joints they once were. and while our knees are among the most important joints in the human body and the most overlooked and under-cared for we speak to Fitness Trainer and Founder of LeapFitness, Dikeledi Amy Monama as we look at Muscles and knee strengthening exercises.