Systems and methods of analyzing a user's motion during a swimming session are described. One or more motions sensors can collect motion data of the user. A processor circuit can make motion analysis based on the motion data. The processor circuit can determine if the user's arm swing is a genuine swim stroke. The processor circuit can also determine whether the user is swimming or turning. The processor circuit can also classify the user's swim stroke style. The processor circuit can also determine the user's swim stroke phase. The processor circuit can also determine the user's stroke orbit consistency.

A strength and endurance training system. The system includes a first assist-resist system, which includes a first motor that is activated and deactivated by a first motor controller, a first drum coupled to the first motor, a first connecting member provided between the first drum and a coupling device which is attachable to an object/individual, and a computer system configured to use as input one or more of i) a measurement of distance of the coupling device form the first assist-resist system, ii) a predetermined strength value, and iii) a measurement of external force applied to the coupling device by the individual and thus operate the first assist-resist system in one of i) a resistive mode, wherein a resistive force is applied to the coupling device when the coupling device moves away from the first assist-resist system, ii) an assistive mode, wherein an assistive force is applied to the coupling device when the coupling device moves towards the first assist-resist system, and iii) a bypass mode, wherein a negligible force (between about 0 N-about 5 N) is applied to the coupling device.

A system for formulating a performance metric of a motion such as water sport motion, preferable a swimming stroke, includes a wearable sensor device including 4 pressure sensors, a 9 degrees of freedom inertial measurement unit (IMU), a micro-processor communicating with the pressure sensors and the IMU, and waterproof housing in the form of a flexible silicone band to house the microprocessor, the pressure sensors and the IMU. The system includes an external computer communicating with the device for receiving and combining input data from each of the pressure sensors and the IMU, via the microprocessor, and a processing unit configured to combine the input data from both the at least one pressure sensor and the IMU. The input data is used to infer at least one force magnitude and at least one force direction, the input data being used to provide the performance metric of the water sport motion.

An adjustable eyewear restraint comprises a first strap having a first adjustment end and a first eyewear coupling end, and a second strap having a second adjustment end and a second eyewear coupling end. The straps are slidably and frictionally engageable to one another to allow adjustment of a length of the restraint by moving adjustment ends of the straps relative to each other. The straps can be slidably interwoven to each other about opening(s) of respective adjustment ends. The opening(s) slidably receive an opposing strap. A strap has a loop, coupleable to eyewear, that comprises first and second edges attached together to form an attachment portion substantially in-line with the first edge. A frictional element is frictionally and slidably coupleable to an earpiece to retain the loop and allow adjustment of a length of an eyewear retainer. Associated systems and methods are provided.

A wearable device for tracking swim activities of a user is provided. The wearable device may include one or more sensors configured to generate sensor data, and based on the sensor data, the wearable device may determine swim metrics such as swim stroke count, swim stroke type, swim lap count, and swim speed. The determined swim metrics may be filtered based on one or more swim periods during which the user is likely to have been swimming. The wearable device may determine such swim periods based on the sensor data and/or the determined swim metrics.

A method and an apparatus for setting a sports mode are provided. Two metal endpoints on an outer surface of an intelligent device are respectively used as an output end and a receive end of signals. A signal sent by the output end is compared with a signal received by the receive end to determine whether the intelligent device currently meets a preset condition. First sports characteristic data detected by a sports sensing apparatus is obtained to determine whether the first sports characteristic data matches preset sports characteristic data corresponding to a swimming mode. When two determining results are both “yes”, it can be determined that the intelligent device meets a setting condition of the swimming mode.

Apparatus and methods for measuring force exerted by an object moving in a fluid or force of a moving fluid on a stationary object. Embodiments may be configured to measure power exerted by an object moving in a fluid. At least one sensor disposed on the object outputs at least one sensor signal corresponding to a pressure differential between first and second surfaces of the object. Data derived from one or more sensor signals may be processed according to a model to output a measure of the force and/or power of the object moving in the fluid or the force of the moving fluid on the stationary object, as a function of time. Embodiments may be configured for applications such as providing feedback for control of actuators in electromechanical systems for liquid or gaseous media, and providing performance metrics during water sports, such as swimming and paddling.

A multi-camera system for multidimensional video capture that is particularly useful for recording the movements of swimmers is disclosed. The system includes a self-propelled mobile frame that is of sufficient size to surround a swimmer while he or she swims. The frame carries a number of equipment pods. Each equipment pod houses cameras, typically a pair of stereocameras, and may house additional sensors as well. Propulsion pods connect the frame to a pair of tracks, one of which is on each side of the frame, and propel the frame along the tracks. The frame may also support one or more booms that carry equipment pods with cameras and allow the system to capture video from additional angles. The frame carries transmission hardware allowing it to communicate video and other data to external receivers and communication devices in real time or near real time, and to receive data from external devices.

A swimming starting platform having a base supporting a tread surface and an anchor ledge for supporting swimmers. The base includes a shaft extending through an interior cavity of the base from a first side panel to a second side panel. An adjustment mechanism is coupled to an end of the shaft and positioned along the first side panel, where the adjustment mechanism is actuatable to rotate the shaft and adjust a position of the anchor ledge relative to the base of the starting platform.

Systems and methods for electronically conducting a fitness activity challenge are disclosed. The method may include first collecting electronic fitness data related to a first fitness activity, collecting second electronic fitness data related to a second fitness activity, generating comparison data by comparing the first electronic fitness data and the second electronic fitness data, and displaying the comparison data.