Abstract: A training sled configurable for adding weights in some embodiments to increase friction and provide for weight-training by lifting portions of the sled. Sled components are slidably or pivotably connected to permit lifting a shoulder member of the sled to different heights and to achieve an optimal training angle. The training sled having an accelerometer, sensor unit and display for sensing, determining and displaying the force of impact and movement of the training sled.

Abstract: A training sled configurable for adding weights in some embodiments to increase friction and provide for weight-training by lifting portions of the sled. Sled components are slidably or pivotably connected to permit lifting a shoulder member of the sled to different heights and to achieve an optimal training angle.

Abstract: Identifying and validating certified individuals (such as fitness trainers) to conduct a fitness program in conjunction with one or more user devices includes a request message being received at a computing device to initiate a fitness client session, the request message includes a request to share content with the computing device and identification information of the request originator. As a result, a certification request message is generated and transmitted to a certification server. A confirmation message may be received to indicate whether a valid certification is associated with the identification information included in the certification request message. A response message is transmitted to the request message indicating a confirmation of the fitness client session, and the content associated with the fitness client session may then be received.