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A method for measuring exercise level during exercise and for measuring fatigue, in which method electrical signals produced by active muscles are measured with a measuring device and feedback is given from an exercise with a perceivable signal from a feedback device. A device for measuring exercise

A method for measuring exercise level during exercise and for measuring fatigue, in which method electrical signals produced by active muscles are measured with a measuring device and feedback is given from an exercise with a perceivable signal from a feedback device. A device for measuring exercise level and fatigue during exercise, which device includes sensors for measuring electrical signals from active muscles and a feedback device for giving feedback. A momentary exercise level and the level of fatigue of a person are measured or estimated by measuring besides electrical signals received from muscles also other quantities describing exercise and from measuring results one or several indexes are calculated by means of which exercises carried out at different times and under different circumstances are comparable with each other.

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The invention claimed is: 1. A method for measuring exercise level during exercise and for measuring fatigue, in which EMG electrical signals produced by active muscles are measured with a measuring device, besides the EMG electrical signals received from the muscles, a momentary exercise level and

The invention claimed is: 1. A method for measuring exercise level during exercise and for measuring fatigue, in which EMG electrical signals produced by active muscles are measured with a measuring device, besides the EMG electrical signals received from the muscles, a momentary exercise level and a level of fatigue of a person are measured or estimated by also measuring other quantities describing exercise, circumstances and/or environments, wherein the other quantities describing exercise include acceleration, velocity, biomechanical movements or motion paths of a body or limb of the person, or position of the person on an exercise means, wherein the other quantities describing circumstances include weather, temperature, wind, or air pressure, and wherein the other quantities describing environments include resistance due to the exercise means, a setting of the exercise means, altitude or steepness of terrain, from results of the measured EMG electrical signals and from the measuring of the other quantities, one or several indexes are calculated by means of which exercises carried out at different times and under different circumstances and/or environments are comparable with each other, feedback is given from the exercise with a perceivable signal from a feedback device during the exercise, by means of which the person may simultaneously monitor and optimize the exercise. 2. A method in accordance with claim 1, in which in addition other biosignals and/or movements of the person are measured. 3. A method in accordance with claim 1, in which a progression velocity of the person is measured. 4. A method in accordance with claim 1, in which external circumstances are measured. 5. A method in accordance with claim 1, in which from the results an index is calculated for describing an economy of the exercise level and exercise techniques of the person. 6. A method in accordance with claim 1, in which from the results an index is calculated for describing the level of fatigue of the person. 7. A method in accordance with claim 1, in which from the results an index is calculated for simulating a level of lactate content of blood of the person and changes in the level of lactate content during the exercise. 8. A device for measuring exercise level and fatigue during an exercise, comprising: sensors for measuring EMG electrical signals from active muscles and a feedback device for giving feedback during the exercise, sensors for measuring other quantities describing exercise, circumstances and/or environments, wherein the other quantities describing exercise include acceleration, velocity, changes of biomechanical movements or motion paths of a body or limb of the person or position of the person on an exercise means, wherein the other quantities describing circumstances include weather, temperature, wind, or air pressure, and wherein the other quantities describing environments include resistance due to the exercise means, a setting of the exercise means, altitude or terrain, and means for processing of results from the measured EMG electrical signals and from the other measured quantities and calculating one or several indexes describing exercises. 9. A device in accordance with claim 8, comprising an outfit or similar, in which there are electrodes for measuring electrical biosignals, a module fastened to an outfit, in which there is electronics necessary for processing the biosignals as well as one or several inertia-sensors. 10. A device in accordance with claim 8, comprising sensors for measuring other biosignals of a person. 11. A device in accordance with claim 8, comprising sensors for measuring movements during exercise and variables affecting those. 12. A device in accordance with claim 8, comprising sensors for measuring external circumstances. 13. A device in accordance with claim 8, comprising a speed sensor placed on the body, exercise means or outfit or similar. 14. A device in accordance with claim 8, comprising a tracking sensor comprising a GPS-device. 15. A device in accordance with claim 8, comprising sensors for measuring of one or several external factors such as current of air. 16. A device in accordance with claim 8, comprising a strap or belt to be removably fastened on the body or limbs and which comprises electrodes for measuring electrical biosignals.