Beta-lactoglobulin, Immobilisation and Muscle Protein Synthesis

King's College London24 enrolled

Overview

The objectives of this study are to: 1. Establish whether combined β-lactoglobulin supplementation and resistance training for 1 week prior to 5 days of limb immobilisation will attenuate the decrease in integrated free-living rates of MPS during short-term muscle disuse. 2. Establish whether combined β-lactoglobulin supplementation and resistance training for 1 week prior to limb immobilisation will attenuate the decrease in muscle mass and strength during short-term muscle disuse. Hypotheses 1. Combining β-lactoglobulin and resistance training for 1 wk prior to 5 d of limb immobilisation will attenuate the decrease in integrated muscle protein synthesis, muscle fibre CSA, quadriceps muscle strength, and leg lean mass during muscle disuse. 2. Combining β-lactoglobulin and resistance training for 1 wk prior to 5 d of limb immobilisation will attenuate the decrease in muscle fibre CSA, quadriceps muscle strength, and leg lean mass during muscle disuse.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

DOUBLE

Enrollment

Conditions

Muscle Atrophy

Interventions

Beta-lactoglobulinDIETARY_SUPPLEMENT

Beta-lactoglobulin (BLG) will be administered thrice daily during a 7 day period of prehabilitation and 5 day period of immobilisation when the leg is placed in a brace.

CarbohydrateDIETARY_SUPPLEMENT

Carbohydrate (dextrose monohydrate) will be administered thrice daily during a 7 day period of prehabilitation and 5 day period of immobilisation when the leg is placed in a brace.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 45 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Male and female * Aged 18-45 years * Healthy * Physically active (≥150-300 minutes of moderate-intensity aerobic physical activity per week OR 75-150 minutes of vigorous-intensity aerobic physical activity per week) * Eumenorrheic and not taking any hormonal birth control (females) Exclusion Criteria: * Dairy allergy or intolerance * Lower limb injury or surgery in the last 6 months, * Lower limb osteoarthritis or other musculoskeletal disorder * A musculoskeletal or blood blotting disorder * An allergy to local anaesthetic * Currently pregnant * Current use of blood thinning medications * Volunteers that take part in structured resistance exercise training * Taking supplements considered to be anabolic to skeletal muscle (protein supplements, creatine, or omega-3 supplements) * Consuming more than 1.2 grams of protein per kilogram of body mass per day in their habitual diet. * Volunteers involved in other studies at the time of enrolment * Volunteers who have taken part in a tracer study in the past 18 months * If without an understanding of verbal or written English * Volunteers with a history of eating disorders

Locations (1)

King's College London

London, United Kingdom

RECRUITING

Outcomes

Primary Outcomes

Muscle protein synthesis

The synthesis of amino acids into new muscle protein.

Time frame: 15 days

Secondary Outcomes

Muscle mass

Lean body mass will be measured using Dual Energy Xray Absorptiometry.

Time frame: 15 days

Central Contacts

Oliver C Witard, PhD

CONTACT

02078484021 oliver.witard@kcl.ac.uk

Alix Hughes, MSc

CONTACT

02078484022 alix.hughes@kcl.ac.uk

Data from ClinicalTrials.gov

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