Can Physical Activity While Sedentary Produce Health Benefits? A Single-Arm Randomized Trial

Marvin A Sackner, Jose R Lopez, Veronica Banderas, Jose A Adams, Marvin A Sackner, Jose R Lopez, Veronica Banderas, Jose A Adams

Abstract

Background: Sedentary time poses a risk to health. Substituting physical activity for inactivity is obvious but this requires a behavior change. Interventions advocated to decrease uninterrupted physical inactivity (defined as Metabolic Equivalent of Task (METS) less than 1.5) are important. One such intervention is accomplished with the Gentle Jogger (GJ), a low risk motorized wellness device which produces effortless, rapid motion of the lower extremities simulating locomotion or fidgeting. GJ produces health benefits in type 2 diabetes, heart disease, and high blood pressure. The purpose of this trial was to ascertain whether GJ increases METS above 1.5 to explain its effectiveness despite sedentary behavior or whether tapping is responsible.

Methods: A randomized single-arm trial was conducted. Subjects were randomized to begin the study in either the supine or seated postures and on the same day crossed over with the starting posture reversed. Oxygen consumption was measured at rest and during GJ.

Results: Twenty-six subjects were studied (15 women and 11 men) with a mean age of 44 ± 15 years and BMI 27.9 ± 5.0, 19 were overweight or obese, and 7 had normal BMI. GJ increased oxygen consumption and METS 15% in the seated posture and 13% in the supine posture. No individual receiving GJ achieved METS exceeding 1.5.

Conclusions: In a moderately obese population, GJ in seated or supine posture did not exceed 1.5 METS. The values are comparable to those reported for sit-stand interventions and cannot explain the health benefits of GJ.

Trial registration: ClinicalTrials.gov, NCT03602365 . Registered on July 26, 2018.

Keywords: Gentle jogger; METS; Oxygen consumption; Physical activity; Physical inactivity; Sedentary.

Conflict of interest statement

JAA performs research for Sackner Wellness Products LLC and is a US co-patent holder for Gentle Jogger®, the Passive Simulated Jogging Device.

VB is a part time study coordinator and employee of Sackner Wellness Products LLC

JRL is a Research Scientist consultant with Sackner Wellness Products LLC

MAS is President of Sackner Wellness Products LLC and Is a US co-patent holder for Gentle Jogger® the Passive Simulated Jogging Device.

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