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.
A-level Physics (Advancing Physics)/Stress, Strain & Young's Modulus - By Micheofire. 1  Stress is a measure of the internal force an object is experiencing per unit cross sectional area. 2  Ï = F A {\displaystyle \sigma = {\frac {F} {A}}}. 3  where Ï is stress (in Newtons per square metre or, equivalently, Pascals).