Modular physical activity monitoring system

1. A system, comprising:

an activity-specific article, the article comprising:

at least one receptacle; and

at least one activity-specific sensor coupled to the receptacle; and

at least one activity-agnostic puck configured to be removably positioned in the receptacle, the puck comprising:

a processor;

a communication interface; and

at least one activity-agnostic sensor coupled to the processor;

wherein the processor is configured to receive information from the activity-specific sensor and the activity-agnostic sensor, and provide the received information through the communication interface, and the processor is further configured to receive a unique identifier from the receptacle, and identify the receptacle or the activity-specific article from the unique identifier.

2. The system of claim 1 , wherein the activity-specific article is a wearable clothing item.

3. The system of claim 1 , wherein the processor is further configured to stamp the information from the activity-specific sensor with the unique identifier.

4. The system of claim 1 , wherein the processor is further configured to stamp the information from the activity-agnostic sensor with a unique identifier of the activity-agnostic puck.

5. The system of claim 1 , wherein the activity-specific sensor is a piezoresistive or piezoelectric sensor.

6. The system of claim 1 , wherein the activity-specific sensor is a piezoresistive sensor formed of interspersed layers of a conductive material, a piezoresistive material, and an insulating material.

7. The system of claim 1 , wherein the activity-agnostic sensor is an inertial measurement unit.

8. The system of claim 1 , the puck further comprising a memory, wherein the processor is further configured to save the received information to the memory.

9. The system of claim 1 , wherein the puck is waterproof.

10. A system, comprising:

an activity-specific article, the article comprising:

at least one receptacle; and

at least one activity-specific sensor coupled to the receptacle, wherein the activity-specific sensor is a piezoresistive sensor formed of a piezoresistive ink; and

at least one activity-agnostic puck configured to be removably positioned in the receptacle, the puck comprising:

a processor;

a communication interface; and

at least one activity-agnostic sensor coupled to the processor;

wherein the processor is configured to receive information from the activity-specific sensor and the activity-agnostic sensor, and provide the received information through the communication interface.

11. A method, comprising: while a puck is removably positioned in a first receptacle;

collecting first activity-specific sensor information through the first receptacle during a first activity period; and

transmitting second activity information from a memory of the puck through a communication interface of the puck;

wherein the second activity information represents second activity-specific sensor information received by the puck through a second receptacle during a second activity period prior to the first activity period, and further represents activity-agnostic sensor information received from within the puck during the second activity period.

12. The method of claim 11 , wherein the first or second activity-specific sensor information is pressure or force, or a combination thereof.

13. The method of claim 11 , wherein the activity-agnostic sensor information is acceleration, velocity, orientation, or gravitational force, or a combination thereof.

14. The method of claim 11 , further comprising transmitting third activity information from the memory of the puck through the communication interface of the puck, wherein the third activity information represents third activity-specific sensor information received by the puck through a receptacle of a third article during a third activity period prior to the second activity period.

15. A sealed removable puck, comprising:

a processor;

a communication interface coupled to the processor;

at least one sensor, the at least one sensor comprising an inertial measurement unit;

a sensor interface coupled to the sensor;

a physical interface configured for coupling to a receptacle;

wherein the processor is configured to:

identify, through information received via the physical interface when coupled to the receptacle, an activity-specific article to which the receptacle is attached by receiving a unique identifier from the physical interface, wherein the processor is further configured to stamp the activity-specific sensor information with the unique identifier;

receive activity-specific sensor information through the physical interface;

receive activity-agnostic sensor information from the sensor interface; and

provide the received activity-specific and activity-agnostic sensor information wirelessly through the communication interface.

16. The sealed removable puck of claim 15 , wherein the at least one sensor includes a pulse rate sensor.

17. The sealed removable puck of claim 15 , wherein the processor is further configured to stamp the activity-agnostic sensor information with a unique identifier of the puck.