Arthralgia/therapy; Holistic Health; Knee Joint/physiopathology; Medicine, Ayurvedic; Osteoarthritis, Hip/therapy; Research Design; Adult; Aged; Analgesics/therapeutic use; Arthralgia/diagnosis; Arthralgia/physiopathology; Clinical Protocols; Combined Modality Therapy; Comparative Effectiveness Research; Diet; Dietary Supplements; Disability Evaluation; Feeding Behavior; Female; Germany; Humans; Male; Massage; Middle Aged; Nutritional Status; Osteoarthritis, Hip/diagnosis; Osteoarthritis, Hip/physiopathology; Pain Measurement; Patient Satisfaction; Posture; Predictive Value of Tests; Prospective Studies; Quality of Life; Risk Reduction Behavior; Severity of Illness Index; Time Factors; Treatment Outcome; Yoga