18. A non-transitory computer-readable medium comprising computer-executable instructions that, when executed, cause an apparatus to perform at least: measuring a physiological characteristic of a user; processing an electronic training script defining a sequence of athletic activities to be performed by the user; and prompting the user to perform a next athletic activity in the sequence of athletic activities based on a measurement of the physiological characteristic indicating completion of a previous athletic activity in the sequence of athletic activities.
18. A non-transitory computer-readable medium comprising computer-executable instructions that, when executed, cause an apparatus to perform at least: measuring a physiological characteristic of a user; processing an electronic training script defining a sequence of athletic activities to be performed by the user; and prompting the user to perform a next athletic activity in the sequence of athletic activities based on a measurement of the physiological characteristic indicating completion of a previous athletic activity in the sequence of athletic activities. 19. The non-transitory computer-readable medium of claim 18 , wherein the computer-executable instructions, when executed, cause the apparatus to: process activity information received from a remote sensing device.