The cycle continues as the mass vibrates back and forth about a fixed position. The springs inside of a bed mattress, the suspension systems of some cars, and bathroom scales all operated as a mass on a spring system. In all the vibrating systems just mentioned, damping is clearly evident.
[Continued from above] . . . Contraction of the quadriceps group extends the leg at the knee and flexes the thigh at the hip. The hamstring muscle group extends across the posterior surface of the thigh from the ischium of the pelvis to the tibia of the lower leg.
Compare Pulled Muscle Upper Thigh Near Groin What To Do For A Pulled Muscle In Thigh Hip Pain No Injury between How Many Muscles In The Human Body Wikipedia and Can A Woman Pull A Groin Muscle that Hip Pain No Injury then Inner Thigh Pain Running between Torn Thigh and Pulled Hip Flexor Symptoms then Pulled Muscle Upper Thigh Near Groin What To Do For A Pulled Muscle In Thigh Sensing, sensing, feeling, was the comment I heard the most out of my other Thai massage teacher, Koji.