In one example, a muscle exercise device includes a first arm, a second arm rotatably connected to the first arm, and the second arm and first arm configured to cooperatively define a recess. The muscle exercise device also includes a resistance element configured to reside in the recess and be compressed between the first arm and the second arm, and a wireless transmitter disposed in either the first arm or the second arm, wherein the wireless transmitter is responsive to communications from an app residing on a user device.

An analysis device for analyzing a spin axis of a ball receives an input of acceleration data and geomagnetic data detected on a time-series basis by a sensor device built in the ball; calculates attitude information of the ball, based on the acceleration data and the geomagnetic data; calculates the spin rate of the ball released from a subject, based on the geomagnetic data; and calculates an angle of the spin axis of the ball relative to a predetermined direction, using a predetermined filter and based on the attitude information, the spin rate, the geomagnetic data, and a first-order differential value and a second-order differential value of the geomagnetic data.

A method includes providing a first video file to a plurality of exercise machines, the first video file including content associated with an exercise class. The method also includes receiving user data from the plurality of exercise machines, the user data including respective settings associated with a common performance metric. In such a method, the respective settings are used on the plurality of exercise machines during playback of a particular part of the first video file. The method also includes identifying a timestamp associated with the particular part of the first video file, and generating an executable control corresponding to the performance metric. The method further includes generating a second video file comprising the content and the executable control. In such methods, playback of the second video file causes display of the executable control at a part of the second video file corresponding to the timestamp.

Systems and methods which provide a motion sensor data-driven framework for sports action recognition and/or assessment using a wearable sensor are described. A motion sensor data-driven system may provide real-time kinematical analysis to athletes engaged in active competition or training sessions under typical competition or training conditions. Analysis of motion sensor data provided according to embodiments may operate to recognize instances of one or more particular sports actions performed by an athlete and/or assess the skill of the athlete from analysis of one or more sports actions. A motion sensor data processing platform of embodiments of a motion sensor data-driven system may comprise a processor-based system configured to receive and analyze data regarding the movement of an athlete's limb reported by a wearable sensor device comprising a micro inertial measurement unit configuration for capturing and reporting data regarding the movement of an athlete's limb.

Provided herein are systems and devices for detecting the position of a subject on a treadmill and adjusting the speed of tread to maintain the subject's position on the treadmill.

Performance of an athlete is evaluated using position data of the athlete over time during performance of a set of movements. Movement metrics for the set of movements are determined, the movement metrics including measures of acceleration and power. Performance metrics for the athlete are then calculated to indicate the athlete's strength and speed. A reference data set is defined based on various attributes associated with the athlete. The performance metrics are applied to the reference data set to determine a performance category for the athlete, the performance category indicating relative strength and speed of the athlete among other athletes represented in the reference data set. Lastly, a training regimen for the athlete is generated based on the performance category.

A sports performance sensor for an implement used in sports, such as a bat or baseball. The implement, e.g. the bat or baseball, is formed with an area inside that can include circuitry. The circuitry can measure rotation acceleration, and speed. The outer surface of this device has pressure sensing fabric, which senses location and pressure on the outer surface. This can form a pressure map of where the user's fingers are touching the outer surface. The information from the user's performance in using the device are transmitted to an external computer such as a phone which creates a pressure sensing map. This pressure sensing map can then be compared to data from either the same user at a different time or from other users. This can be specific to different actions, for example it can be specific to the user throwing a specific kind of pitch, or the user carrying out a specific operation such as swinging a bat to hit a specific kind of pitch.

A method for determining biomechanical parameters of the stride of a runner, using an accelerometer device on the wrist, on the upper arm, on the head or on the shoe, comprising the steps of measuring an initial sequence of acceleration data in at least the vertical direction using said accelerometer device; identifying in said initial sequence of acceleration data at least one frequency component caused by relative motion of the accelerometer device relative to the runner center of masse; attenuating said frequency component, so as to determine a modified sequence of acceleration data; determining said biomechanical parameters from said modified sequence of acceleration data.

In an aspect, an apparatus is provided and includes an air-tight object having an outer layer, an inner layer, and a cover, and a light module. The opacity of the outer layer is greater than the opacity of the inner layer. The outer layer defines a first aperture and a second aperture. The inner layer and the cover define a first interior region. The inner layer defines a second interior region. The light module is encapsulated within the first interior region and is configured to send light through the inner layer, through the second interior region of the air-tight object, and through the second aperture of the outer layer, wherein the cover is disposed between the light module and the outer layer.

Hand held weight units of light weight manufactured as a solid unit, a shell unit with core insert combinations or modular units with interlocking ends. Shell units with core inserts and modular interlocking units allow for the changing of held weight by inserting or removing inserts or by locking or unlocking of modular weight unit sets creating varying held weight. The weight units are primarily used with upper body exercises during aerobic exercises in the home, outdoors, or in a gym setting such as walking or running to vary the intensity of workout during use.