Abstract: A method for measuring stress based on the heart rate (HR), the heart rate variability (HRV), and the activity level of a user includes recording the HR, the HRV, and the activity level of a user at various times during the day. Thereafter, the three values are correlated to arrive at a stress level of the user. The stress level is estimated based on a predetermined set of algorithms and analysis methods. The physical disposition and the activity levels of the user are automatically detected and the vital parameters, i.e., the HR and the HRV recorded at times that are deemed fit for conducting orthostatic tests.

Abstract: A method of determining a user's training load, includes determining protein combustion information and determining the user's training load based on the protein combustion information. The protein combustion information may be determined using heart rate information, activity information, carbohydrate reserve information determined using a carbohydrate combustion model and carbohydrate reserve information representing the user's carbohydrate reserves at a beginning of at least one exercise session, fitness information, intensity information, nutritional intake information representing nutritional intake during at least one exercise session, and/or a fat combustion model. The user's training load may be determined based on a mechanical stimulus and/or a modality. Recovery time information may be determined based on the training load. A corresponding apparatus and computer-readable medium correspond to the above method.

Abstract: A method for measuring stress based on the heart rate (HR), the heart rate variability (HRV), and the activity level of a user includes recording the HR, the HRV, and the activity level of a user at various times during the day. Thereafter, the three values are correlated to arrive at a stress level of the user. The stress level is estimated based on a predetermined set of algorithms and analysis methods. The physical disposition and the activity levels of the user are automatically detected and the vital parameters, i.e., the HR and the HRV recorded at times that are deemed fit for conducting orthostatic tests.

Abstract: A method of determining a user's training load, includes determining protein combustion information and determining the user's training load based on the protein combustion information. The protein combustion information may be determined using heart rate information, activity information, carbohydrate reserve information determined using a carbohydrate combustion model and carbohydrate reserve information representing the user's carbohydrate reserves at a beginning of at least one exercise session, fitness information, intensity information, nutritional intake information representing nutritional intake during at least one exercise session, and/or a fat combustion model. The user's training load may be determined based on a mechanical stimulus and/or a modality. Recovery time information may be determined based on the training load. A corresponding apparatus and computer-readable medium correspond to the above method.