hamstring, groin, knee, ankle, abdominal muscle, triceps, pectoral muscle, abductor muscle, thigh, shin, gluteus muscle, adductor, ligament, rotator cuff, achilles tendon, adductor muscle, tendon, fibula, sprained, forearm, calf, elbow, tendinitis, hamstring tendon, soreness, spasms, glute, achilles, biceps, rib cage, intercostal muscle, kneecap, stress fracture, shoulder, trapezius, trapezius muscle, labrum, herniated disc, contusion, meniscus, gluteal muscle, clavicle, wrist, flexor muscle, charley horse, pectoral, pinkie, bicep, stiffness, metacarpal bone, hip, bursitis, flexor, shin splints, leg, patella, collarbone, shoulder blade, concussion, abdominal, tendonitis, dorsi, hyperextension, hamate bone, metacarpal, displaced fracture, metatarsal, tibia, sternum, iliopsoas, gluteus, injury, sciatic nerve, oblique, hernia, gluteus medius, teres minor, teres major, rib, suspensory ligament, tailbone, splint, deltoid muscle, intercostal, scapula, stinger, compression fracture, muscle spasm, instep, hairline fracture, collar bone, buttock, deltoid, pec, gluteus minimus, ulna, soleus, bunion, rhomboid muscle, gastrocnemius muscle, radial nerve, cartilage, extensors, flexors, rectus, frontal, adduction, contraction, extensor, maxilla, auricle, distal, limbs, parietal, masseter, supraspinatus, muscle, diaphragmatic, gluteal, levator, sternocleidomastoid, sphincteric, muscular, subscapularis, peroneal, vasomotor

extensor muscle

musculus quadriceps femoris, quad, quadriceps femoris