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.
Causes of Thigh Pain Tension in the muscle groups on the back of the thigh is extremely common. If left unaddressed, this tension will often lead to painful stiffness that is experienced in the back of the thigh region.auses of Thigh Pain Tension in the muscle groups on the back of the thigh is extremely common. If left unaddressed, this tension will often lead to painful stiffness that is experienced in the back of the thigh region.