Abstract: Determining the co-location of a group of electronic devices by receiving a communication providing the current location of a primary electronic device of the group, responsive to, and within a predefined amount of time after, receiving the communication, instructing at least one secondary electronic device of the group to provide their current location, receiving a communication providing the current location of the at least one secondary electronic device, and determining that the electronic devices meet a predefined co-location condition by determining that the current location of the primary electronic device is within a predefined minimum distance from the current location of the at least one secondary electronic device, and determining that the communications from the primary electronic device and the at least one secondary electronic device are received within a predefined time window.

Abstract: Suspension training systems include one or more bands, and one or more handles. The handles can be coupled to the bands, and transmit user-generated forces to the bands. The systems also include a force sensor that measures the user-generated forces acting on the bands, and a computing device that acquires and displays information relating to the exercise session. The systems can generate recommendations for future exercise sessions based on the acquired information, so that exercise sessions can be tailed to the specific needs and capabilities of the user.