TY - JOUR
T1 - Regulating intensity using perceived exertion during extended exercise periods
AU - Kang, Jie
AU - Hoffman, Jay R.
AU - Walker, Heather
AU - Chaloupka, Edward C.
AU - Utter, Alan C.
PY - 2003/6
Y1 - 2003/6
N2 - The present study was undertaken to examine the validity of using the OMNI scale of perceived exertion to regulate intensity during extended exercise periods. Forty-eight subjects (24 male, 24 female) were recruited and each subject completed a maximal graded exercise test (GXT) and two 20-min submaximal exercises. During the GXT, ratings of perceived exertion (RPE) as well as oxygen uptake (VO2) and heart rate (HR) equivalent to 50 and 70% of maximum VO2 (VO2max) were estimated. During each submaximal exercise, subjects were instructed to produce and maintain a workload equivalent to the RPE estimated at 50 or 70% ̇VO2max, and VO2 and HR were measured every 5 min throughout the exercise. Of the 48 subjects, 12 (6 male and 6 female) performed both the estimation and production trials on a treadmill (TM/TM), 12 (6 male and 6 female) performed both the estimation and production trials on a cycle ergometer (C/C), 12 (6 male and 6 female) performed the estimation trial on a treadmill and the production trial on a cycle ergometer (TM/C), and 12 (6 male and 6 female) performed the estimation trial on a cycle ergometer and the production trial on a treadmill (C/TM). No differences in ̇VO2 between the estimation and any 5 min of the production trial were observed at either intensity in TM/TM and C/C. No differences in HR between the estimation and any 5 min of the production trial were also observed at 50% VO2max in TM/TM and at both 50 and 70% VO2max in C/C. However, HR was higher at 20th min of the production trial at 70% ̇VO2max in TM/TM. Both the VO2 and HR were generally lower in TM/C and higher in C/TM. However, these differences diminished when values were normalized using VO2max of the same mode that other groups had attained. These data suggest that under both intra- and intermodal conditions, using the OMNI perceived exertion scale is effective not only in establishing the target intensity at the onset of exercise, but also in maintaining the intensity throughout a 20-min exercise session.
AB - The present study was undertaken to examine the validity of using the OMNI scale of perceived exertion to regulate intensity during extended exercise periods. Forty-eight subjects (24 male, 24 female) were recruited and each subject completed a maximal graded exercise test (GXT) and two 20-min submaximal exercises. During the GXT, ratings of perceived exertion (RPE) as well as oxygen uptake (VO2) and heart rate (HR) equivalent to 50 and 70% of maximum VO2 (VO2max) were estimated. During each submaximal exercise, subjects were instructed to produce and maintain a workload equivalent to the RPE estimated at 50 or 70% ̇VO2max, and VO2 and HR were measured every 5 min throughout the exercise. Of the 48 subjects, 12 (6 male and 6 female) performed both the estimation and production trials on a treadmill (TM/TM), 12 (6 male and 6 female) performed both the estimation and production trials on a cycle ergometer (C/C), 12 (6 male and 6 female) performed the estimation trial on a treadmill and the production trial on a cycle ergometer (TM/C), and 12 (6 male and 6 female) performed the estimation trial on a cycle ergometer and the production trial on a treadmill (C/TM). No differences in ̇VO2 between the estimation and any 5 min of the production trial were observed at either intensity in TM/TM and C/C. No differences in HR between the estimation and any 5 min of the production trial were also observed at 50% VO2max in TM/TM and at both 50 and 70% VO2max in C/C. However, HR was higher at 20th min of the production trial at 70% ̇VO2max in TM/TM. Both the VO2 and HR were generally lower in TM/C and higher in C/TM. However, these differences diminished when values were normalized using VO2max of the same mode that other groups had attained. These data suggest that under both intra- and intermodal conditions, using the OMNI perceived exertion scale is effective not only in establishing the target intensity at the onset of exercise, but also in maintaining the intensity throughout a 20-min exercise session.
KW - Cycle ergometer
KW - Effort sense
KW - Intensity
KW - Prescription
KW - Treadmill
UR - http://www.scopus.com/inward/record.url?scp=0038150518&partnerID=8YFLogxK
U2 - 10.1007/s00421-003-0811-9
DO - 10.1007/s00421-003-0811-9
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C2 - 12712344
AN - SCOPUS:0038150518
SN - 1439-6319
VL - 89
SP - 475
EP - 482
JO - European Journal of Applied Physiology
JF - European Journal of Applied Physiology
IS - 5
ER -