Tonal Systems, Inc.

Justin Ziccardi

David Mallard

Lars Eugene Gilstrom

Sumner Browning Paine

Sarah Wilson Lewis

David Azaria

An exercise machine includes a first housing, a central electromagnetic resistance unit, a resistance mechanical interface, and a mechanical expansion portion. The resistance mechanical interface includes a spool and a cable configured to provide a force from the central electromagnetic resistance unit in response to a control interface that receives commands from an exercise actuator. The cable extends out from a first side of the first housing. The mechanical expansion port is configured to link the first housing to a second housing via a mechanical attachment. The mechanical expansion port is located at a second side of the first housing. The second side of the first housing is adjacent to the first side of the first housing.

Modular exercise machine

Commands are received from an exercise actuator via a control interface. Collaborative information about an exercise session is received via a software interface. A force from a central electromagnetic resistance unit is provided in response to the control interface and the software interface via a resistance mechanical interface.

A report of a state of a local exercise device based at least in part on a user response to an electromagnetic resistance unit in the local exercise device is sent. An update based on a state of a remote exercise device is received. The electromagnetic resistance unit is caused to change state in reaction to the received update.

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San Francisco, CA, United States of America

Justin Ziccardi