A non-transitory recording medium storing an information processing program executable by a computer to perform processing, the processing comprising: acquiring a sound signal collected by a microphone provided in a venue including a skating rink, and a video obtained by imaging a competitor competing at the skating rink; estimating a takeoff-from-ice time and a landing-on-ice time of a jump performed by the competitor according to silencing and return of an ice sound based on the sound signal; and synchronizing time information of the sound signal with time information of the video and specifying, as a jump section, a section from a frame corresponding to the takeoff-from-ice time to a frame corresponding to the landing-on-ice time in the video.

A non-transitory recording medium storing an information processing program executable by a computer to perform processing, the processing comprising: acquiring a sound signal collected by a microphone provided in a venue including a skating rink, and a first video obtained by photographing a competitor on the skating rink; estimating a takeoff-from-ice time and a landing-on-ice time of a jump performed by the competitor according to a silencing and a return of an ice sound based on the sound signal; and synchronizing time information of the sound signal with time information of the first video, and specifying each of a location corresponding to the takeoff-from-ice time and a location corresponding to the landing-on-ice time in a trajectory of a location of the competitor on the skating rink based on the first video.

An ice-skating stride training system includes a stride pad having visual cues used for teaching ice-skating techniques and improving skating stride mechanics. The system further includes methods of use including methods for developing proper skating techniques. The system offers coaches, teams, and players a cost-effective way to increase hockey specific skating mechanics, develop better overall athletic ability, improve stride strength, and decrease risk of injury and fatigue—all without using ice.

A resistive training device to be worn by a user can include a first and second skate device configured to be worn on the user's feet. The first and second skate device can include a first plurality of attachment mechanisms. The first plurality of attachment mechanisms can include an interior attachment mechanism; an exterior attachment mechanism; and a rear attachment mechanism. The resistive training device can also include a belt configured to be worn around the user's waist. The belt can include comprising a second plurality of attachment mechanisms which can include a left hip attachment mechanism; a right hip attachment mechanism; and a tailbone attachment mechanism. The resistive training device can also include a plurality of resistive elements. Each resistive element can be removably connected to one of the first plurality of attachment mechanisms and one of the second plurality of attachment mechanisms.

A skate spinner comprises a platform configured for a user's foot to be placed thereon, and a support unit forming a lower part of the platform contacting a ground surface and having a curved protruded surface starting from a front end to a rear end thereof. The support unit includes plates each having a thickness equal to at least a thickness of an ice-skate blade and being aligned in a lateral direction of the skate spinner at a predetermined distance. An overall bottom surface of the plates contacting the ground surface has a spherical surface outline.

Wearable electronic devices that are designed to be worn on the head of a user while the user is swimming can determine swimming strokes and swimming performances of the user using motion sensors. Using a sound speaker, the wearable electronic device can play music and provide audio feedback to the swimmer. By comparing the swimming performance of the swimmer wearing the device with previously recorded swimming data, the wearable electronic device can provide audio comparison results to the swimmer while the swimmer is swimming in water. The wearable electronic device can also support similar functions for jumping actions.

Wearable electronic devices that are designed to be worn on the head of a user while the user is swimming can determine swimming strokes and swimming performances of the user using motion sensors. Using a sound speaker, the wearable electronic device can play music and provide audio feedback to the swimmer. By comparing the swimming performance of the swimmer wearing the device with previously recorded swimming data, the wearable electronic device can provide audio comparison results to the swimmer while the swimmer is swimming in water. The wearable electronic device can also support similar functions for jumping actions.

A resistive training device to be worn by a user can include a first and second skate device configured to be worn on the user's feet. The first and second skate device can include a first plurality of attachment mechanisms. The first plurality of attachment mechanisms can include an interior attachment mechanism; an exterior attachment mechanism; and a rear attachment mechanism. The resistive training device can also include a belt configured to be worn around the user's waist. The belt can include comprising a second plurality of attachment mechanisms which can include a left hip attachment mechanism; a right hip attachment mechanism; and a tailbone attachment mechanism. The resistive training device can also include a plurality of resistive elements. Each resistive element can be removably connected to one of the first plurality of attachment mechanisms and one of the second plurality of attachment mechanisms.

An ice-skating measuring apparatus includes an ice-skate blade holder and an ice-skate blade. The blade holder has a front beam column and a rear beam column. The blade includes at least one sensor configured to measure forces acting on the blade, and the blade is detachable from the blade holder.

Disclosed herein is a skate spinner including a platform configured of a flat board having a user's foot placed thereon, and a support unit corresponding to a lower part of the platform contacting a ground surface and having a curved protruded shape configuring a curved surface starting from a front end to a rear end, wherein the support unit is configured to have a series of plates each having a thickness equal to at least a thickness of an ice-skate blade and being aligned along a left-to-right direction at a predetermined distance, wherein, when observing a cross-section of the skate spinner taken along a direction being perpendicular to a front-to-rear longitudinal direction of the skate spinner, a height of each plate becomes higher starting from the plates positioned at both side ends of the skate spinner towards the plate positioned at a center of the skate spinner, and wherein an overall bottom surface of the plates contacting the ground surface configure a spherical surface outline. As described above, the skate spinner may allow a user to embody spin movements, which correspond to the same movements performed on ice, even on generally flat ground surfaces outside of the ice, when practicing for the spin movements using the skate spinner, wherein the skate spinner includes a support unit contacting the ground surface and having an overall spherical surface outline, and may allow the user to naturally tilt sideways (i.e., from left to right, and vice versa) in accordance with a shift (or change) in a center of gravity (or weight) according to front-to-back movements of the user's body as well as a shift in the center of gravity according to left-to-right movements of the user's body.