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An exercise monitoring system. The monitoring system is configured to acquire workout information from an exercise equipment device that includes a set of selectable resistive elements, such as a weight stack. The monitoring system includes a testing subsystem, sensing subsystem, and processor that

An exercise monitoring system. The monitoring system is configured to acquire workout information from an exercise equipment device that includes a set of selectable resistive elements, such as a weight stack. The monitoring system includes a testing subsystem, sensing subsystem, and processor that cooperate to acquire the workout information by monitoring the set of selectable resistive elements.

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1. A monitoring system configured to acquire workout information from an exercise equipment device that includes a set of selectable resistive, elements, wherein a net resistance of the exercise equipment device is determined by a selected subset of the resistive elements; the monitoring system comp

1. A monitoring system configured to acquire workout information from an exercise equipment device that includes a set of selectable resistive, elements, wherein a net resistance of the exercise equipment device is determined by a selected subset of the resistive elements; the monitoring system comprising:a testing subsystem configured to apply a detectable query to the resistive elements, wherein the detectable query changes state when an exercise repetition is performed, and wherein the change of state indicates the resistive elements that are selected;a sensing subsystem configured to monitor the state of the detectable query; anda processor configured to determine the net resistance and to count the number of repetitions performed according to the monitored state of the detectable query. 2. The monitoring system of claim 1, wherein, for each resistive element, the testing subsystem includes a corresponding emitter and the sensing subsystem includes a corresponding receiver configured to conditionally receive a signal from the corresponding emitter. 3. The monitoring system of claim 2, wherein the corresponding receiver is configured to receive a signal from the corresponding emitter and reflected from the corresponding resistive element when the resistive element is inactive. 4. The monitoring system of claim 2, wherein the corresponding receiver is configured to receive a signal from the corresponding emitter and transmitted through a void left by the corresponding resistive element when the resistive element is active. 5. The monitoring system of claim 1, wherein the processor is further configured to determine a range of motion according to the monitored state of the detectable query. 6. The monitoring system of claim 5, wherein the processor is further configured to calculate a total work performed for each repetition by multiplying the net resistance and the range of motion. 7. The monitoring system of claim 1, wherein the monitoring system further comprises an interface configured to present the determined net resistance and counted repetitions. 8. The monitoring system of claim 7, wherein the interface includes a display configured to visually present the determined net resistance and counted repetitions. 9. The monitoring system of claim 7, wherein the interface includes a sound transducer configured to audibly present the counted repetitions. 10. The monitoring system of claim 7, wherein the interface includes an I/O interface configured to transfer the determined net resistance and counted repetitions as computer readable data. 11. An exercise equipment device, comprising:a set of selectable resistive elements, wherein a net resistance of the exercise equipment device is determined by a selected subset of the resistive elements;a testing subsystem configured to apply a detectable query to the resistive elements, wherein the detectable query changes state when an exercise repetition is performed, and wherein the change of state indicates the resistive elements that are selected;a sensing subsystem configured to monitor the state of the detectable query;a processor configured to determine the net resistance and to count the number of repetitions performed according to the monitored state of the detectable query; andan interface configured to present the determined net resistance and counted repetitions. 12. The exercise equipment device of claim 11, wherein each resistive element is a weight module of a weight stack. 13. The exercise equipment device of claim 12, wherein, for each weight module, the testing subsystem includes a corresponding emitter and the sensing subsystem includes a corresponding receiver. 14. The exercise equipment device of claim 13, wherein each weight module is configured to reflect a signal from the corresponding emitter to the corresponding receiver when the weight module is at rest. 15. The exercise equipment device of claim 13, wherein each weight module is configured to block a signal from the corresponding emitter to the corresponding receiver when the weight module is at rest. 16. The exercise equipment device of claim 11, wherein the interface includes a display configured to visually present the determined net resistance and counted repetitions. 17. The exercise equipment device of claim 11, wherein the interface includes a sound transducer configured to audibly present the counted repetitions. 18. The exercise equipment device of claim 11, wherein the interface includes an I/O interface configured to transfer the determined net resistance and counted repetitions as computer readable data. 19. The exercise equipment device of claim 11, wherein the processor is further configured to determine a range of motion according to the monitored state of the detectable query. 20. The exercise equipment device of claim 19, wherein the processor is further configured to calculate a total work performed for each repetition by multiplying the net resistance and the range of motion.