Breaking up prolonged sitting with light PA

• Research type

  Research Study

• Full title

  Breaking up prolonged sitting: how much light physical activity is required to improve health?

• IRAS ID

  258371

• Contact name

  Naomi E Brooks

• Contact email

  n.e.brooks@stir.ac.uk

• Sponsor organisation

  University of Stirling

• Duration of Study in the UK

  0 years, 11 months, 25 days

• Research summary

  Prolonged periods of sitting are linked to individuals having greater chance of developing health problems such as cardiovascular disease and type 2 diabetes. Breaking up sedentary time (eg with physical activity (PA) breaks) reduces the chance of developing these problems. However, the optimal duration and intensity of PA break(s) to improve health is unknown.

  The aim of this study is to examine the response of younger and older adults to different durations of light PA during a day of prolonged sitting. We will compare different durations of physical activity on the body’s glucose response (continuous glucose monitor), glucose and lipid response (finger prick blood sample), mood, cognition and sleep.

  The 3 experimental conditions during a day of sitting (7h)are : 1) no-PA; 2) 30 minutes of light intensity PA (1.6 mph treadmill walk) and; 3) 60 minutes of light intensity PA.

  After screening, participant adults who are inactive (do not meet the PA recommendations) and sedentary (sit for prolonged periods regularly) will be asked to visit the lab 4 times over a 4-6 week period.

  Familiarisation visit
  Following informed consent, blood glucose and pressure, height, weight, waist and hip girth will be measured. A DEXA scan will be conducted. Validated walking and handgrip strength test will be undertaken. Participants will undergo PA familiarisation on the treadmill. Exercise history, wellbeing and sleep questionnaire will be completed.

  Research periods
  In each research period (three periods separated by ≥6 days), data collection occurs over 5 days (see research protocol). Glucose and activity monitors are worn throughout. Monitors will be applied on day 1 and dietary and exercise restrictions will begin. No lab time is required on day 2 or 3. On day 4 they will attend the lab from 8:30am to 3:30pm. Finger prick blood samples and arm blood pressure will be taken.

• REC name

  East of Scotland Research Ethics Service REC 2

• REC reference

  19/ES/0004

• Date of REC Opinion

  28 Feb 2019

• REC opinion

  Further Information Favourable Opinion