Overview

• Arnold Schwarzenegger, 76, and his girlfriend Heather Milligan, 49, highlight their fitness routine in a YouTube video, focusing on knee and joint care.
• Schwarzenegger praises Milligan as 'the best physical therapist in the world,' crediting her expertise in managing his own knee issues.
• The couple met in 2012 when Milligan treated Schwarzenegger's shoulder injury, and have since shared a bond over fitness and health.
• In the video, Milligan demonstrates exercises like the wall sit, with Schwarzenegger showcasing the proper form to protect knees.
• Schwarzenegger, a former California governor and bodybuilder, shares his journey with knee problems and the importance of physical therapy in his life.