A non professional subject (52 y.o., weight 67 kg, height 170 cm, BMI 23,2), did two training sessions on a free-ride mountain bike Scott Nitrus 20 wearing the heart rate monitor Polar S 725 Tour Edition and the Global Position System (GPS) Garmin Forerunner 305. The aim of the study was to gain more understanding on these instruments (leader of athletic performance analysis) and to evaluate the agreement between their collected data. Findings show that both in a dirt and in an asphalt road the maximal and the median cardiac frequencies (bpm) are the two variables less influenced by the kind of instrument used for the measurement. Analyzing the percentage of means difference among variables acquired by Polar and Garmin system during dirt road trials, only for distance (km) and for mean velocity (km/h) some differences were reported between the two instruments: 5,8% and 6,8% respectively. Only in this condition both these two variables were underestimated with the Garmin system. On the other hand, during asphalt road training sessions the percentage of means difference were: 1,2% for time (s) and 2,9% for distance (km). Finally, the distance (km) was found to be the variable measured with more precision by both instruments with a standard deviation in the range 0,01-0,04 km. The study confirms that the use of these instruments needs and objective assessment of measure repeatability, in order to allow the comparison of data collected from different athletes during their sporting practice.
Comparison of two heart rate monitors during an outdoor training session
SCOTTON, Claudio Giovanni;PIZZIGALLI, LUISA
2012-01-01
Abstract
A non professional subject (52 y.o., weight 67 kg, height 170 cm, BMI 23,2), did two training sessions on a free-ride mountain bike Scott Nitrus 20 wearing the heart rate monitor Polar S 725 Tour Edition and the Global Position System (GPS) Garmin Forerunner 305. The aim of the study was to gain more understanding on these instruments (leader of athletic performance analysis) and to evaluate the agreement between their collected data. Findings show that both in a dirt and in an asphalt road the maximal and the median cardiac frequencies (bpm) are the two variables less influenced by the kind of instrument used for the measurement. Analyzing the percentage of means difference among variables acquired by Polar and Garmin system during dirt road trials, only for distance (km) and for mean velocity (km/h) some differences were reported between the two instruments: 5,8% and 6,8% respectively. Only in this condition both these two variables were underestimated with the Garmin system. On the other hand, during asphalt road training sessions the percentage of means difference were: 1,2% for time (s) and 2,9% for distance (km). Finally, the distance (km) was found to be the variable measured with more precision by both instruments with a standard deviation in the range 0,01-0,04 km. The study confirms that the use of these instruments needs and objective assessment of measure repeatability, in order to allow the comparison of data collected from different athletes during their sporting practice.
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