All participants were asked to conduct a 3-month training of an aerobic exercise program with moderate intensity by spinning bikes (3 times/week, 30 mins/times, BLADEZ H9355i-iSpada 2) at National Taiwan University. The exercise intensity was moderate, and the participants were instructed to maintain the heart rate reserve at 40–59%, predicted based on the age and heart rate of rest. A wireless belt was worn around the chest (BLADEZ, Polar T34), monitoring the heart rate during exercise. The spinning bike automatically adjusted the pedaling resistance according to the real-time heart rate of each participant. This training time was fixed from 4:00 pm to 7:00 pm to avoid confounding circadian variations.
Polar t34
Manufactured by Polar Electro
Sourced in Finland
The Polar T34 is a wireless heart rate transmitter designed for use with compatible Polar devices. It collects and transmits the user's heart rate data during physical activities.
Automatically generated - may contain errors
Lab products found in correlation
4 protocols using polar t34
1
Aerobic Exercise Training on Spinning Bikes
2
Shuttle Running Test Protocol
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The SWT required players to run back and forth between two lines placed 100 m apart on a soccer pitch. Players ran for 4 min at 12 km•h -1 with a change of direction (COD) every 100 m.
Running speed was controlled by an auditory signal from a CD player. After the 4-minute period, players were asked to stop running and stand without any movement to enable recording of heart rate recovery. Heart rate was recorded throughout the test at 1-second intervals using a heart rate monitor (Polar T34, Polar Electro Oy, Kempele, Finland) synchronized to a portable 15 Hz global positioning system (GPS; SPI Pro X, GPSports, Canberra, Australia). The Team AMS software (GPSports, Version 2.1) was later used to conduct the analyses. Heart rate during exercise (HRex) was computed using the mean heart rate during the last 30-second of the running part of SWT (i.e., from 3:30 to 4:00 min). HRR was calculated in the first 60-second after the cessation of the running part of SWT (i.e., from 4:00 to 5:00) either as the reduction in the number of beats (HRR60s) or the mean HR (HRpost1).
Running speed was controlled by an auditory signal from a CD player. After the 4-minute period, players were asked to stop running and stand without any movement to enable recording of heart rate recovery. Heart rate was recorded throughout the test at 1-second intervals using a heart rate monitor (Polar T34, Polar Electro Oy, Kempele, Finland) synchronized to a portable 15 Hz global positioning system (GPS; SPI Pro X, GPSports, Canberra, Australia). The Team AMS software (GPSports, Version 2.1) was later used to conduct the analyses. Heart rate during exercise (HRex) was computed using the mean heart rate during the last 30-second of the running part of SWT (i.e., from 3:30 to 4:00 min). HRR was calculated in the first 60-second after the cessation of the running part of SWT (i.e., from 4:00 to 5:00) either as the reduction in the number of beats (HRR60s) or the mean HR (HRpost1).
3
Cardiorespiratory Fitness Assessment Protocol
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Participants’ baseline characteristics (mean [SD]) are shown in Table 1 . All measures were assessed pre and post intervention. Blood pressure was collected on the left arm positioned at heart height with the subjects in a seated position by an automatic upper arm blood pressure monitor (Omron MX13). Measures were made at least three times at 3-min intervals, where an average of the two lowest measures was used for analysis [31 (link)]. Waist circumference was measured using the World Health Organization guidelines [32 ]. Predicted VO2 max was obtained by performing a submaximal 8-min ramped step test [33 (link)]. Heart rate response (Polar T34; PolarElectro OY, Kempele, Finland) and simultaneous breath-by-breath expired gas were collected using a portable indirect calorimeter (Cosmed K4 b2; Rome, Italy), calibrated per the manufacturer’s guidelines. Individual HRmax was estimated [34 (link)] and plotted against VO2 data for the determination of predicted VO2 max.
4
Metabolic and Ventilatory Responses Measurement
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Standard metabolic and ventilatory responses were measured breath-by-breath using a metabolic cart (Vmax Encore 229; CareFusion, Yorba Linda, CA). In the younger subjects, heart rate (HR) was measured using a telemetric system (Polar T34; Polar Electro, Kempele, Finland). In the older subjects, HR was measured using a 12-lead electrocardiogram (Cardiosoft Diagnostics System v6.71; GE Healthcare, Mississauga, Canada).
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