Modular cable-based resistance workout device

A modular resistance device comprising:

• a base unit comprising a cable wound around a spool and a recoil spring coupled to the spool such that the recoil spring exerts a resistive force upon the spool to resist unwinding of the cable from the spool;
• a first modular spring plate comprising a first power spring mounted on a first shaft, wherein the first modular spring plate is couplable to and decouplable from the base unit;
• and
• a second modular spring plate comprising a second power spring mounted on a second shaft,
• wherein the first modular spring plate is attachable to a first side of the base unit and the second modular spring plate is attachable to a second side of the base unit via the second shaft and the first side of the base unit is opposite the second side of the base unit, and
• wherein the resistive force applied to the cable increases when the first modular spring plate is coupled to the base unit and the resistive force applied to the cable decreases when the first modular spring plate is decoupled from the base unit.