Abstract: This application discloses a method to use sensors for games of skill relating to physical exercise. The method may employ the use of sensors that can collect data, including location using GPS, sense barometric pressure, steps walked, blood oxygen levels, navigational directions, gyroscopic movement, heart rate, and many other data types. Players may challenge other players to competitions wherein the players make a challenge wherein a winning player is rewarded a wager. Data collected by the sensors may be used for metrics to determine the winning player.