Do short-term exercise bouts at low and vigorous intensities affect body composition in active people ages 18-25 as measured by Dual-Energy X-ray Absorptiometry?
Presentation Type
Rapid Research Proposal
Abstract
Dual-Energy X-Ray Absorptiometry (DEXA) is considered a gold standard for measuring body composition. This study aims to examine if exercising at low and vigorous intensities affects the immediate results of DEXA body composition scans. This study will be conducted by recruiting 20 physically active men and women ages 18 to 25 who don’t have restrictions to perform the exercises that are going to be used (walk/run on a treadmill, plank, and push-ups). Each subject will complete 4 exercise protocols (2 for high intensity and 2 for low intensity) with at least 48 hours of rest between protocols. Participants will take an initial DEXA scan and again following exercise bouts, then the results will be compared from the same day. Low intensity exercises will include walking for 20 minutes at 40-50% of maximum heart rate (MHR) as well as push-ups/planks at 4-5 Reps in Reserve (RIR), while high-intensity exercises will include running for 20 minutes at 75-85% of MHR and push-ups/planks at 8 RIR. The accepted medical limitation for scan radiation is 20 millisieverts (mSv) per year, with a typical DEXA whole body scan equaling about 0.003 mSv or 1-4 microsieverts (μSv). Subjects will be informed of potential risks involved with DEXA scans, but current research suggests that during a cross-country flight a person is exposed to 40 μSv. Concurrent research has conducted as many as 4 successive DEXA scans at a single interval, so risk has been minimized for participants both in number of scans and time frame between scans.
Do short-term exercise bouts at low and vigorous intensities affect body composition in active people ages 18-25 as measured by Dual-Energy X-ray Absorptiometry?
Dual-Energy X-Ray Absorptiometry (DEXA) is considered a gold standard for measuring body composition. This study aims to examine if exercising at low and vigorous intensities affects the immediate results of DEXA body composition scans. This study will be conducted by recruiting 20 physically active men and women ages 18 to 25 who don’t have restrictions to perform the exercises that are going to be used (walk/run on a treadmill, plank, and push-ups). Each subject will complete 4 exercise protocols (2 for high intensity and 2 for low intensity) with at least 48 hours of rest between protocols. Participants will take an initial DEXA scan and again following exercise bouts, then the results will be compared from the same day. Low intensity exercises will include walking for 20 minutes at 40-50% of maximum heart rate (MHR) as well as push-ups/planks at 4-5 Reps in Reserve (RIR), while high-intensity exercises will include running for 20 minutes at 75-85% of MHR and push-ups/planks at 8 RIR. The accepted medical limitation for scan radiation is 20 millisieverts (mSv) per year, with a typical DEXA whole body scan equaling about 0.003 mSv or 1-4 microsieverts (μSv). Subjects will be informed of potential risks involved with DEXA scans, but current research suggests that during a cross-country flight a person is exposed to 40 μSv. Concurrent research has conducted as many as 4 successive DEXA scans at a single interval, so risk has been minimized for participants both in number of scans and time frame between scans.