Apple Inc.

Robin T Guers

Vinay R Majjigi

Hung A Pham

Karthik Jayaraman Raghuram

Alexander Singh Alvarado

Bharath Narasimha Rao

Umamahesh Srinivas

Xing Tan

Adeeti V Ullal

James P Ochs

Craig H Mermel

Sunny K Chow

Ronald Keryuan Huang

Adam S Howell

Gunes Dervisoglu

Edith Merle Arnold

Rami Y Hindiyeh

Stephen P Jackson

Mrinal Agarwal

The present disclosure relates to methods and systems of determining swimming metrics of a user during a swimming session. The method can include receiving, by a processor circuit of a user device, motion information from one or more motion sensors of the user device; determining, by the processor circuit using the motion information, a first set of rotational data of the user device, wherein the first set of rotational data is expressed in a first frame of reference; converting, by the processor circuit, the first set of rotational data into a second set of rotational data, wherein the second set of rotational data is expressed in a second frame of reference; determining, by the processor circuit, one or more swimming metrics of the user; and outputting the one or more swimming metrics.

Systems and methods for determining swimming metrics

The present disclosure relates to systems and methods of estimating energy expenditure of a user while swimming. A processor circuit of a user device can estimate a speed of the user based on a stroke rate and a stroke length. The processor circuit can estimate an efficiency of the user. The processor circuit can classify a swimming style of the user. The processor circuit can determine energy expenditure of the user based on the speed, the efficiency, and the style. The processor circuit can also detect glides of the user and adjust the energy expenditure.

Systems and methods of swimming calorimetry

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Cupertino, CA, United States of America

Robin T Guers