NCT04199949

Effects of Five Days of Physical Inactivity on Endothelial Function in Healthy Humans

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 8 (actual)
• Sponsor: University of Nottingham · Academic / Other
• Sex: Male
• Age: 18 Years – 35 Years
• Healthy volunteers: Accepted

Summary

Physical inactivity is a significant predictor of major non-communicable diseases such as type 2 diabetes (7%), cardiovascular disease (6%), musculoskeletal disorders and some types of cancer, and has been proposed to be the 4th leading cause of death worldwide. The investigators aim is to assess the vascular (endothelial) function before and after a 5-day period of reduced activity of upper and lower limbs via an arm sling and daily step counts reduction, respectively, in healthy participants. Twelve young (ages of 18 - 35 years), healthy, males and females, recreationally active with a body mass index between 18 and 27 kg/m2 will be recruited. The participants will then randomly undergo two 5-day interventions: (A) 5 consecutive days of habitual daily levels of physical activity and matched food intake (Control trial). (B) 5 consecutive days of reduced step count by 80% compared to the Control trial combined with their non-dominant arm placed in a sling and a reduction in food (energy) intake (\~20%) to match the reduction in energy expenditure induced by inactivity (Inactivity trial). On days 1 and 6 of each experimental trial, the endothelial function of the brachial and popliteal arteries, and hand grip strength will be measured.

Conditions

• FMD

Interventions

Type	Name	Description
BEHAVIORAL	Inactivity	On days 1 and 6 of each main trial, the participants will be asked to attend the laboratory after an overnight fast of at least 8 to 12h to undergo brachial and popliteal arteries FMD measurements (30 min apart) using duplex-Doppler ultrasound, followed by assessment of the hand grip strength of their non-dominant hand using a hand dynamometer.

Timeline

• Start date: 2018-11-01
• Primary completion: 2020-03-01
• Completion: 2020-03-01
• First posted: 2019-12-16
• Last updated: 2022-02-23

Locations

1 site across 1 country: United Kingdom