India, Oct. 4 -- Knee pain can become more common with age, but staying active and strengthening the muscles around the knee can help support mobility. Carrie Lynn Sisson, a 70-year-old fitness content creator and longevity advocate, shares in her June 11 Instagram post four exercises she incorporates into her routine to keep her knees strong and mobile. (Also read: Think 8 hours of sleep is enough? Neurologist busts brain health myths on sleep, stress, alcohol and more )

Carrie says people shouldn't automatically avoid letting their knees travel over their toes during squats, as long as the movement feels comfortable and controlled.

"Avoiding this range is what makes knees fragile! Go as deep as feels good and hold onto a counter if yo...