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.
Wiktionary (0.00 / 0 votes) Rate this definition: mechanical (Adjective). Characteristic of someone who does manual labour for a living; coarse, vulgar. mechanical (Adjective). Related to mechanics. mechanical engineering. mechanical (Adjective). Related to mechanics.