Managing Stiffness: Tips for Improving Flexibility and Mobility

Stiffness refers to a sensation of reduced flexibility or resistance to movement in the muscles or joints, often caused by sedentary lifestyle, age, or underlying conditions.
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Flexibility Exercises | Joint Mobility | Muscle Stiffness Relief | Muscle Tightness | Joint Stiffness
Prepared by Lee Cheng, reviewed by Jane Cox

Stiffness FAQ


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How do you calculate stiffness?

Stiffness is the resistance of an elastic body to deflection or deformation by an applied force - and can be expressed as k = F / δ (1) where k = stiffness (N/m, lb/in) F = applied force (N, lb) δ = extension, deflection (m, in) Forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more.

What does a material's stiffness mean?

A material’s stiffness indicates its ability to return to its original shape or form after an applied load is removed. When a material is subjected to a load — its own unsupported weight, an external applied load, or both — it experiences stress and strain.

What is stiffness in physics?

The stiffness, of a body is a measure of the resistance offered by an elastic body to deformation. For an elastic body with a single degree of freedom (DOF) (for example, stretching or compression of a rod), the stiffness is defined as Stiffness is usually defined under quasi-static conditions, but sometimes under dynamic loading.

What is stiffness & why is it important?

Stiffness, as explained earlier, refers to the ability of a material to resist deformation when subjected to an external load. It determines how much a material or structure will bend, twist, or stretch under an applied load. A stiffer material will deflect less under a given load than a less stiff one.

Stiffness References

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