Does Passive Movement Increase Glucose Uptake Into Muscle?

Not Applicable

Not yet recruiting

• Conditions: Glucose; Insulin; Blood Flow Restriction Therapy; Blood Flow Velocity

• Registration Number: NCT06704126
• Lead Sponsor: Lancaster University

Brief Summary

This study aims to examine the blood sugar response after a meal, and how three different movement protocols may impact the blood sugar level.

Participants will visit the lab on three different occasions. Before each visit the participant will eat a meal we give them and have a cannula (a needle with a tube) put in their arm to allow blood sampling for the visit.

Visit A will be the participant just having their legs moved by the machine, visit B will be the participant having their legs moved by the machine with the addition of blood pressure cuffs on their thighs, and visit C will just be the participant sitting still on the machine.

Detailed Description

This study will require nine participants to be recruited and enrolled. The aim of the study is to determine the effect of passive movement, with and without blood flow restriction, on blood glucose and insulin primarily. Other outcomes included elsewhere in this registration. The protocol will involve an initial health screening/familiarisation session in the Human Performance Laboratory (HPL) at Lancaster University, followed by three randomly ordered HPL visits per participant. At the beginning of each HPL visit, the participant will be given a standard meal. The design is a crossover study therefore each participant will complete visits A, B and C and act as their own control.

Each of the visits A, B and C will involve consumption of a meal (86g carbohydrate content) and insertion of a cannula to the arm. Blood samples will then be drawn from the cannula at five minute intervals for approximately 3.5 hours. Three gold-top vacutainers will be taken throughout each visit to allow for insulin analysis. Once the blood is sampled, the vacutainer will be left to clot at room temperature for 15 minutes and then spun in a centrifuge at 4°C, 1800 RCF, for 10 minutes. The supernatant will be transferred to a microfuge tube via pipetting and stored at -80°C until analysis at a future date using an enzyme-linked immunosorbent assay (ELISA). In addition, 1ml syringe blood samples will be taken every 5 minutes and ejected onto a non-absorbent pad. A fraction of this ejection on the pad will then drawn up into a capillary tube to be analysed by a Biosen benchtop glucose/lactate analyser.

Visit A will invole the participant sitting on a Biodex isokinetic dynamometer and having both legs passively flexed and extended through 90 degrees, at a frequency of 1Hz for 30 minutes. This will be 60 seconds on, followed by 60 seconds off, repeated 15 times.

Visit B will involve the same as visit A, but with the addition of blood flow restriction intermittently. These are blood pressure bands (VALD AirBands) around the thighs which will inflate and deflate to cause 80% arterial occlusion in their inflated state. These will inflate and deflate in tandem with the passive movement going on and off.

Visit C is a control visit and will involve the participant sitting in the Biodex only with no movement or blood flow restriction occuring.

Throughout the study, measurements will be taken to meausure the outcome measure specified in this registration.

Study Timeline

• Status Verified: 2024-11
• Study First Submitted: 2024-11-19
• Study First Submitted QC: 2024-11-22
• Last Update Submitted: 2024-11-22
• Study First Posted: 2024-11-25
• Last Update Posted: 2024-11-25
• Study Start: 2024-12
• Primary Completion: 2025-03
• Study Completion: 2025-03

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: Male
• Target Recruitment: 9

Inclusion Criteria

• 18-35 years old, inclusive
• Male
• Healthy (no known long-term health conditions / acute febrile illness)

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Exclusion Criteria

• Smokers
• Recent blood donation (within 12 weeks)
• Any medication
• Phobia of needles
• Blood pressure ≥ 140/90 mmHg, either figure
• Any potential atrial fibrillation or cardiovascular health conditions
• Diabetes
• Allergies to barley, gluten, nuts, almonds

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Primary Outcome Measures

Name	Time	Method
Blood insulin level	Measured pre-meal, pre-training and immidiately post-training, each across the three visits/treatments	Obtained from gold-top vacutainer blood draw

Secondary Outcome Measures

Name	Time	Method
Blood glucose level	From pre-meal, every 5 minutes for 185 minutes	Obtained by 5 minute interval blood draws from cannula then drawn up by a capillary tube and analysed by Biosen benchtop analyser
Blood lactate level	From pre-meal, every 5 minutes for 185 minutes	Obtained by 5 minute interval blood draws from cannula then drawn up by a capillary tube and analysed by Biosen benchtop analyser
Femoral arterial blood velocity	Measured at 0, 1, 5, 10, 20 and 30 minutes relative to the movement/control protocol commencing	Obtained pulse speed via ultrasound doppler
Electromyography	Measured for 30 minutes beginning from movement/control protocol commencement	Electromyography used to obtain magnitude of voluntary muscle contraction, sensor placed at 80% on the line between the anterior spina iliaca superior and the joint space in front of the anterior border of the medial ligament with perpendicular orientation as per Seniam guidance

Trial Locations

Locations (1)

Lancaster University; 🇬🇧 Lancaster, United Kingdom