What is the Optimal FIT of Sedentary Interruption Bouts to Improve Cardiometabolic Health?

Keeling SM, Buchanan CA, Dalleck LC. What is the Optimal FIT of Sedentary Interruption Bouts to Improve Cardiometabolic Health? JEPonline 2018;21(2):1-18. The purpose of this study was to quantify differences in markers of cardiometabolic health with different frequency, intensity, and time (FIT) parameters to reduce sedentary behavior. The subjects consisted of 7 men and 6 women (with a mean age [+ or -] SD of 74.2 [+ or -] 7.8 yrs >6 hrs of sedentary behavior per day) who performed 4 treatments of sedentary interruption bouts (SIB) lasting one week each. The FIT of the SIB differed across each program. There were 1-wk long washout/control periods between each of the SIB treatments. Cardiometabolic risk factors were measured weekly. The subjects performed a consistent exercise training program throughout the intervention to permit examination of the independent effect of reducing sedentary behavior through different SIB programs on cardiometabolic health. SIB1 (every 60 min, 2 METs, 5 min) elicited a significant increase (P60 min), a longer duration of interruption bout activities (i.e., 10 min) is more likely to be favorable to cardiometabolic health. Key Words: Metabolic Syndrome, Risk Factor, Sitting Time