Abstract: Techniques are disclosed for dynamically configured portable power generation. A first motion of a first pull cord mechanically coupled to a first pull-cord generator is sensed, wherein the first pull cord is also mechanically coupled to a limb of a human body. A first tension-control signal is determined as a function of the first motion. The first-tension control signal is transmitted to a first variable tensioner configured to control a tension in the first pull cord. A tension in the first pull cord is set using one or more processors based on the first tension-control signal. Electrical power is generated using the first pull-cord generator, and power generation resulting from the generating electrical power is determined. Feedback is generated to set a tension based on the determined power generation.