This Insight is the first in a series of models that examine the dynamics of population growth and decline in a simple environment.  It follows on from a series of four Insights that introduce the basic concepts of Systems Dynamics that start here.

The next Insight model introduces the concept of limits to growth and explores the more complex behaviour this generates.  The model can be found here. 

A comprehensive system dynamics model exploring the Sarcopenic Paradox. Now includes Resistance Training (Mechanical Tension) to demonstrate how exercise lowers the leucine threshold and fights anabolic resistance.