To be honest, I have yet to find a quality mass gainer on the market. The problem with most mass gainers is that they are loaded with cheap sugars as a carb source. Not only can this lead to greater fat gain, it can make drinking them several times a day unhealthy.
Mechanical stress: physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion.
STRESS: The force applied to a plane divided by the area of the plane. COMPRESSIVE STRESS: The stress generated by forces directed toward one another on opposite sides of a real or imaginary plane. TENSILE STRESS: The stress generated by forces directed away from one another on opposite sides of a real or imaginary plane. SHEAR STRESS: Stress (force per unit area) that acts parallel to a (fault) plane and tends to cause the rocks on either side of the plane to slide by one another. STRAIN: The result of stress applied to a body, causing the deformation of its shape and/or a change of volume. ELASTIC RESPONSE: The deformation of a body in proportion to the applied stress and its recovery once the stress is removed. ELASTIC LIMIT: The maximum amount of stress a material can withstand before it deforms permanently. DUCTILE RESPONSE: The permanent deformation, without fracture in the shape of a solid.