Force is the product of mass and acceleration:
Force = mass × acceleration
F = ma
, where acceleration is separable into velocity (v) and time (t).
Force = mass × Δv / Δt
“Δ” represents the quantity Delta, the mathematical word for “rate of change”. We can now quantify the required Force to move the stone the distance of the field: it is the mass of the stone multiplied by the quotient of the velocity that we carry the stone (our speed), divided by the time it takes us to carry it.
Except that we have not accounted for the Force required to overcome our own kinetic chain.
Absolute vs. Relative Work
If we carry a stone for the sake of exercise over a distance in a certain amount of time, we have the components to quantify the Absolute Work to move the stone. However, we have an entirely incomplete picture of the result of this task on the body. What the task yields us in benefit – not the task itself – is the reason to potentially carry the stone in the first place.
The science of movement requires a mastery of both Absolute and Relative Work values in order to understand efficiency of training the kinetic chain. When we can calculate these values, we can understand how and when to train.
In order to do this, we must be able to account for all masses, accelerations, and Displacements of both the task set as well as the kinetic chain-body set of data. That data comprises all the aforementioned values across all the approximate 360 joints of the human body.