Mobility Training is a structured approach to improving how joints and surrounding tissues move through usable ranges of motion. It is a clinical and performance **concept**, not a single test or procedure. It is commonly discussed in orthopedics, sports medicine, physical therapy, and post-operative rehabilitation. It aims to support efficient movement, functional capacity, and tolerance to daily or sport-specific tasks.

Stretching Exercise is a planned movement or position used to lengthen muscle–tendon units and related soft tissues. It is a clinical and rehabilitation concept rather than a single test or device. It is commonly used in physical therapy, sports medicine, orthopedics, and general rehabilitation. It is discussed when evaluating flexibility, range of motion, and movement-related pain or stiffness.

Muscle Strengthening is a concept and clinical intervention focused on increasing a muscle’s ability to generate force. It is commonly delivered as structured exercise using resistance (body weight, bands, weights, or machines). It is used across orthopedics, sports medicine, physical therapy, and rehabilitation medicine. It is discussed alongside pain, function, injury recovery, and performance capacity.

Orthopedic Rehabilitation is the structured process of restoring function after musculoskeletal injury, disease, or surgery. It is a clinical concept that includes assessment, goal setting, therapeutic interventions, and reassessment over time. It is commonly delivered by multidisciplinary teams in orthopedic clinics, hospitals, and outpatient rehabilitation settings. It focuses on pain, mobility, strength, coordination, and safe return to daily activities.

Ankle Foot Orthosis is an external brace that supports the ankle and foot during standing and walking. It is a **device** used in orthopedics, rehabilitation medicine, neurology, and physical therapy. In plain terms, it helps position the foot and ankle to improve stability, clearance, and gait mechanics. It is commonly discussed when evaluating weakness, deformity, or abnormal gait patterns.

A Knee Immobilizer is a removable external device that limits motion at the knee joint. It is a medical device (orthosis) used to keep the knee in a relatively straight position. It is commonly used in emergency care, orthopedics, sports medicine, and postoperative settings. Its role is usually temporary stabilization while a diagnosis is clarified or tissues heal.

A Shoulder Immobilizer is an orthopedic device used to restrict motion of the shoulder and support the arm. It is a **device** rather than an anatomic structure, disease, or test. It is commonly used in emergency care, fracture clinics, sports medicine, and postoperative rehabilitation settings. Its goal is to reduce shoulder movement while tissues heal or pain is controlled.

A Lumbar Brace is an external support worn around the lower back and abdomen. It is a medical device used to modify motion, load, and posture of the lumbar spine. It is commonly used in orthopedic, sports medicine, spine, occupational health, and rehabilitation settings. It is typically considered part of conservative (non-operative) spine care and post-injury or post-operative support.

A Cervical Collar is an external support worn around the neck to limit motion and provide stabilization. It is a medical device used in orthopedics, trauma care, neurosurgery, and rehabilitation. It is commonly applied after suspected cervical spine injury or during recovery from certain neck conditions. Different designs provide different levels of motion restriction and patient comfort.

A Spinal Orthosis is an external supportive device used to influence motion and alignment of the spine. It is a **device** (an orthosis) rather than a diagnosis or a surgical procedure. It is commonly used in orthopedic surgery, spine surgery, rehabilitation medicine, emergency care, and physical therapy settings. It is applied to help stabilize, offload, or guide the spine during healing, deformity management, or symptom control.