METHOD AND APPARATUS FOR ASSESSING ACCLIMATIZATION TO ENVIRONMENTAL CONDITIONS AND TO ASSESS FITNESS LEVEL TAKING INTO ACCOUNT THE ENVIRONMENTAL CONDITIONS AND THE LEVEL OF ACCLIMATIZATION

The present invention discloses a system of estimating acclimatization to environmental conditions and providing a corrected fitness level estimates based on said acclimatization level. The environmental conditions are particularly related to heat and altitude.At first previous training history is provided comprising plurality of day records, whereeach day record comprising a date stamp and information regarding altitude and optionally temperature and humidity and training history comprising timestamp and training load data from executed exercises in stored recordsThe fitness level is converted following steps* A heat index difference ID is calculated between the heat index and a preset temperature during the exercise* Each heat dose is essentially proportional to a square of the achieved training effect in the exercise and proportional to the calculated heat index difference* Correction factor regarding fitness level value is based on stored altitude data of said stored records,* Basic fitness level value is adjusted with the correction factor and a real fitness level value is obtained,* The real fitness level value is presented using the portable device .