Not unless he is causing physical damage.
because exercises done in club reduces weight, it reduce mass, so club should be called mass watchers
its were you hold your dick and squash the balls and dick onto each other mostly you might have sex after it
mass production mainly reduces the costs of labor..
because of the molasses
To increase fuel mileage.
by reducing the mass you reduce the friction, and by reducing the friction reduce the fuel needed to move the car, this applies to all cars not only CO2 cars.
The results vary for different people, but the whole purpose of dieting is typically to reduce your mass.
I know a tuned mass damper is a device mounted in structures to reduce the amplitude of mechanical vibrations.
Density is mass/volume. So for a given mass as the volume increases the density will reduce.
Don't drive Mass public transit
is a device mounted in structures to reduce the amplitude of mechanical vibrations