B-31 Free Communication/Poster - Variables Influencing Perception of Effort: MAY 28, 2008 1:00 PM - 6:00 PM ROOM: Hall B
Many people run outdoors when the weather is nice and indoors when bad. However, the perceived physiological responses to these two modes are yet not fully understood.
PURPOSE: The purpose of this investigation was to compare the acute physiological responses while running outdoors (OD) as compared to indoor (TM) treadmill running.
METHODS: Ten apparently healthy college students [21.8 (2.3) yrs, 73.5 (11.8) kg, and 177.8 (7.4) cm] participated in this study. No restrictions were placed on diet or hydration status, however they were asked to not run the day prior to testing. Each subject participated in a 1 mile run on a measured outdoor track at a comfortable selfselected pace. Speed was then calculated based upon their timed OD mile to determine treadmill pace for the TM run. The runs were separated by a minimum of 24 hours. HR, RPE, and BP were measured every 2 min during the runs and in the final min.
RESULTS: Resting HR and BP were not significantly different (p>0.05) between OD and TM sessions. There was also no significant difference (p>.05) for SBP or DBP between the two modes post exercise. A significantly higher final HR (p=0.01) was obtained during the OD, yet the TM yielded a significantly higher final RPE (p=0.003).
CONCLUSIONS: The physiological responses to running indoors versus outdoors differ, yet the perception of the elevated HR response during outdoor running was not recognized by RPE. These results indicate that although HR was minimally different, subjects perceived that they were working harder. This needs to be considered when using RPE to determine intensity of an exercise session when running on a treadmill. Further research in this area is needed to determine the perceived response vs. physiological response during running.