Device and method for enhancing user operation of an exercise machine

1. A device configured to control user operation of an exercise machine, comprising:

a control unit including logic configured to:

obtain a stroke measure associated with an exercise motion performed by the user operating the exercise machine, wherein said stroke measure is a distance between two end positions of said exercise motion measured during operation by the user;

obtain a speed value associated with a target speed for the exercise motion, wherein the target speed represents a predetermined maximum speed between end positions of the exercise motion;

determine a target period for the exercise motion, based on the stroke measure and the speed value, wherein the target period (T 1 ), representing the exercise motion from a first end position to a second end position and back to the first end position is determined as T 1 =pi*x/v, where x is the stroke measure and v is the target speed; and

output a guide indicator representing the target period on a display.

2. The device of claim 1 , comprising a data receiver configured to receive position data of a resistance element of the exercise machine from a sensor arrangement, wherein the logic is configured to determine the stroke measure based on said position data.

3. The device of claim 2 , wherein the logic is configured to present a second indicator representing actual movement of the resistance element based on said position data.

4. The device of claim 1 , wherein said guide indicator is controlled to oscillate with the determined target period.

5. The device of claim 4 , wherein said guide indicator is controlled to present a repetition indication, associated with a number of repetitions of the exercise motion carried out in one set of repetitions.

6. The device of claim 1 , wherein the logic is configured to:

obtain a first speed value (v 1 ) associated with a first target speed from a first end position to a second end position of the exercise motion, and

obtain a second speed value (v 2 ) associated with a second target speed from the second end position to the first end position of the exercise motion,

wherein said target period includes a first period portion based on the stroke measure and the first speed value, and a second period portion based on the stroke measure and the second speed value.

7. The device of claim 6 , wherein said target period includes an idle period between the first period portion and the second period portion.

8. The device of claim 1 , comprising a data receiver configured to receive said stroke measure from a sensor arrangement of the exercise machine.

9. The device of claim 1 , comprising a memory for storing said stroke measure.

10. The device of claim 1 , comprising said display.

11. The device of claim 1 , wherein said control unit comprises:

a processor; and

memory storage;

wherein the processor is configured to execute program code stored in said memory storage to generate said logic.

12. The device of claim 1 , wherein said guide indicator includes an animation of a circle controlled to change radius with the determined target period between an inner radius limit and an outer radius limit.

13. A system configured to control user operation of an exercise machine, comprising:

a device having a control unit and a display;

a sensor arrangement connectable to the exercise machine, including:

an accelerometer to sense acceleration during an exercise motion, and

a range meter to sense a relative position of a member of the exercise machine; and

a sensor controller configured to output data to the device, the data that is output is based on data that is sensed by the sensor arrangement;

the control unit including logic configured to:

obtain a stroke measure from the sensor arrangement associated with an exercise motion performed by the user operating the exercise machine, wherein said stroke measure is a distance between two end positions of said exercise motion measured during operation by the user;

obtain a speed value associated with a target speed for the exercise motion, wherein the target speed represents a predetermined maximum speed between end positions of the exercise motion;

determine a target period for the exercise motion, based on the stroke measure and the speed value, wherein the target period (T 1 ), representing the exercise motion from a first end position to a second end position and back to the first end position is determined as T 1 =pi*x/v, where x is the stroke measure and v is the target speed; and

output a guide indicator representing the target period on the display.

14. The system of claim 13 , wherein the sensor arrangement is configured to:

detect initiation of a motion using the accelerometer;

detect a relative position using the range meter responsive to detected initiation; and

determine start of a stroke responsive to the detected relative position exceeding a threshold value from a rest position.

15. A method carried out in a user device for controlling user operation of an exercise machine, comprising:

obtaining a stroke measure associated with an exercise motion performed by the user operating the exercise machine, wherein said stroke measure is a distance between two end positions of said exercise motion measured during operation by the user;

obtaining a speed value associated with a target speed for the exercise motion, wherein the target speed represents a predetermined maximum speed between end positions of the exercise motion;

determining a target period for the exercise motion, based on the stroke measure and the speed value, wherein the target period (T 1 ), representing the exercise motion from a first end position to a second end position and back to the first end position is determined as T 1 =pi*x/v, where x is the stroke measure and v is the target speed; and

outputting a guide indicator representing the target period on a display.