Early Arthroscopic Partial Meniscectomy(APM)

Inclusion Criteria: * • Must be age between 35 and 70 years old; * Clinical diagnosis of metabolic syndrome; * Clinical diagnosis of degnerate meniscus tears; Exclusion Criteria: * Must be able to have no acute knee injury such as car crash or acute sports injury; * Must be able to have no knee surgeries history; * Must be able to have no rheumatoid arthritis or serious knee osteoarthritis with deformity; * Must be able to have no contraindications to MRI; * Must be able to have no severe cardiopulmonary disease; * Must be able to have no musculoskeletal or neuromuscular impairments ; * Must be able to have good visual, hearing, or cognitive;