This study examined the daily activity levels of 38 middle-aged females, using Lifecorder and fitness diaries. In fitness diaries, activities were divided into <exercise> and <activities of daily living> and recorded, with their contents and durations. On comparison between the physical activity levels recorded by Lifecorder and those subjectively reported in fitness diaries, the two were not in agreement. The subjectively reported levels of <activities of daily living> were recorded more than <exercise> (p<0.01). Furthermore, those overestimating their subjective activity levels were frequently diagnosed with obesity based on their BMI (p<0.05). I think the device which can continue a record needs fitness diaries with the feeling of achievement and satisfaction.
