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.
1 Definition of stress - A stress is defined as a force per unit area, acting on an infinitesimal surface element. 2  Stresses have both magnitude (force per unit area) and direction, and the direction is relative to the surface on which the stress acts.  There are normal stresses and tangential stresses.