The Impact of Bed Rest, Aging & NMES on Skeletal Muscle

Status Recruiting

Clinical Trial Summary

Loss of muscle mass is common phenotypic trait of muscular disuse and ageing. The loss of muscle mass affects, among others, the ability to maintain homeostasis of glucose metabolism and the energy reservoir in catabolic conditions, while also affecting mechanical muscle function which can cause detrimental impairments in general functional status and hence quality of life. However, a limited amount of research has attempted to elucidate molecular regulators of muscle mass loss following bed rest in older individuals and across genders. Consequently, the mechanistic drivers are unresolved and there are currently no effective therapeutic strategies to counteract muscle wasting and loss of function in individuals submitted to bed rest e.g. during hospitalization. Purpose The purpose is to examine the effects of 5 days of bed rest on muscle mass, including myofibrillar protein synthesis and breakdown, and muscle function, and elucidate molecular regulators of muscle mass loss and metabolic pathways, while also investigating if potential negative effects can be counteracted by daily NeuroMuscular Electrical Stimulation (NMES) across different age and genders. Methods The study is designed as a randomized controlled cross-over 5-day bed rest study including a group of healthy young (18-30 years) and healthy old (65-80 years) men and women. Participants will receive daily electrical stimulation (NMES) of the thigh muscles (30 min x 3/day) on one leg (ES), while the other leg serves as a control (CON). Participants will be tested at baseline (pre) and after (post) intervention for muscle strength, muscle power, balance, and muscle activation. Blood samples are collected at several time points and muscle biopsies are sampled pre- and post-intervention along with assessment of whole-body muscle mass and thigh muscle mass. Scientific exposition The results from the study can potentially provide insight into the adaptive mechanisms associated with NMES training and muscular disuse on both cellular- and whole-body level. The understanding of the underlying mechanisms is crucial for the application of NMES in a therapeutic context and will furthermore help us understand the basic mechanism regulating the skeletal muscle mass during both training and muscular disuse. Overall, the results can potentially help establishing treatments to counteract loss of muscle mass, muscle function and muscle health during periods of muscular disuse.

Clinical Trial Description

n/a

Study Design

Related Conditions & MeSH terms

Muscle Function
Muscular Disorders, Atrophic
Neuromuscular Electrical Stimulation

Clinical Trial Details

NCT number	NCT05617222
Study type	Interventional
Source	Bispebjerg Hospital
Contact	Sofie K Hansen
Phone	0045 22423877
Email	sofie.krarup.hansen.01@regionh.dk
Status	Recruiting
Phase	N/A
Start date	April 29, 2022
Completion date	August 1, 2024

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

The Impact of Bed Rest, Aging and NMES on Skeletal Muscle

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms