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Reversing Muscle Loss With Exercise Training and Daily Consumption of Pomegranate Juice

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT03258346
Recruitment Status : Completed
First Posted : August 23, 2017
Last Update Posted : February 20, 2019
Sponsor:
Collaborator:
POM Wonderful LLC
Information provided by (Responsible Party):
University of Texas at Austin

Brief Summary:
A research study regarding the body's response to several weeks of training using short sprints and pomegranate juice supplementation

Condition or disease Intervention/treatment Phase
Sarcopenia Cardiovascular Risk Factor Other: Inertial Load Cycling Training Dietary Supplement: Pomegranate Juice Dietary Supplement: Placebo Not Applicable

Detailed Description:

The investigators have shown that chronic pomegranate juice consumption in both young untrained and weight-trained men partially protects muscles against the damage done from performing high intensity eccentric contractions and that it accelerates recovery of function. Clearly, skeletal muscle is a target for some of the healthful molecules in pomegranate juice. However, the most widespread and serious ailment to strike skeletal muscle is sarcopenia (e.g.; loss of muscle mass and becoming 'frail') with age due predominantly to a loss of 'fast-twitch' muscle fibers. Since adults rarely sprint or exert maximal force or power, they rarely use their fast-twitch muscle fibers, which thus degenerate greatly with age. Usually, about one-half of a person's muscle fibers are fast-twitch. It is the investigators' hypothesis that the combination of power exercise training and pomegranate juice supplementation (POM) over 10 weeks, will elicit greater improvements in maximal muscular power and functional physical abilities compared to power training with a placebo. The investigators also will identify changes in size and composition of leg muscles (MRI) and of the whole body (DEXA). The investigators simple logic is that muscles deteriorate with age because they are 'turned-off' and that exercise training can turn them 'back-on', but in order for the muscle fibers to fully repair when turned 'back-on' with exercise, they might benefit from agents known to foster repair, such as the natural polyphenols in pomegranate juice. It has recently been found that polyphenols are metabolized into urolithins which improve muscle cell function due to increased mitophagy. The investigators aim to determine if power training and pomegranate juice have additive effects in promoting improvements of muscle function and mass in men and women age 50-70 y.

A second purpose is to include a cardio-metabolic exercise training stimulus into the workout without compromising the efficacy of the power training. One feature of cardio-metabolic training is an increase in muscle mitochondria and oxygen utilization which might improve muscle fiber repair. The 'power training' will consist of maximal effort 4 sec sprints on a cycle ergometer with no added resistance with the only load being that of the inertia of the flywheel as the subject accelerates from 0 to their maximal RPM's while cycling (100-150 RPM)('inertial load ergometer'; ILE). The power training will be accomplished by having the subject complete 15-30 sprints in a 15 min period. During the training bouts, initially the subjects will rest 56 s between sprints (week 1- complete 15 sprints in each15 min bout), and then 41 s between sprints (weeks 2-5 and complete 20 sprints) and finally 26 s between sprints (weeks 6-10 and complete 30 sprints). The shorter rest periods (41 s and 26 s) will result in incomplete recovery of the cardio-respiratory system and thus the oxygen consumption and heart rate will average 50-70% of maximal values, which is a similar intensity as jogging, but without the jarring of foot strike.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 40 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Masking Description: Pomegranate juice will be administered in double blind placebo controlled method. Coding will be established by POM Wonderful, LLC.
Primary Purpose: Prevention
Official Title: Reversing Muscle Loss With Exercise Training and Daily Consumption of Pomegranate Juice
Actual Study Start Date : November 7, 2017
Actual Primary Completion Date : December 15, 2018
Actual Study Completion Date : December 15, 2018

Resource links provided by the National Library of Medicine


Arm Intervention/treatment
Experimental: Exercise and Pomegranate Juice
Exercise training with daily consumption of pomegranate juice containing polyphenols
Other: Inertial Load Cycling Training
Each session of training will require a total of 15 min with the total time actually exercising of only 60-120 sec. The first week will consist of performing 15 'sprints' on the ILE, beginning each sprint with 56 sec of rest. During week 2-5, subjects will rest 41 sec between sprints, completing 20 bouts. Finally, during weeks 6-10, subjects will take 26 s rest between sprints and complete 30 bouts).
Other Name: High intensity interval training

Dietary Supplement: Pomegranate Juice
Subjects will consume 8oz of pomegranate juice daily for duration of study.

Placebo Comparator: Exercise and Placebo
Exercise training with daily consumption of pomegranate juice with polyphenols removed
Other: Inertial Load Cycling Training
Each session of training will require a total of 15 min with the total time actually exercising of only 60-120 sec. The first week will consist of performing 15 'sprints' on the ILE, beginning each sprint with 56 sec of rest. During week 2-5, subjects will rest 41 sec between sprints, completing 20 bouts. Finally, during weeks 6-10, subjects will take 26 s rest between sprints and complete 30 bouts).
Other Name: High intensity interval training

Dietary Supplement: Placebo
Subjects will consume 8oz of pomegranate juice daily, that has had the polyphenols removed.




Primary Outcome Measures :
  1. Change in muscle volume [ Time Frame: Baseline to 11 weeks ]
    Volume of the thigh musculature as determined by MRI analysis.

  2. Change in sarcopenia obesity [ Time Frame: Baseline to 11 weeks ]
    Intermuscular adipose tissue infiltration as measured by MRI

  3. Change in aerobic capacity [ Time Frame: Baseline to 11 weeks ]
    VO2 Max on a cycle ergometer

  4. Change in anaerobic capacity [ Time Frame: Baseline to 11 weeks ]
    The percent of maximal aerobic capacity that a subject can exercise at while not building up blood lactate

  5. Change in muscle fatigue [ Time Frame: Baseline to 11 weeks ]
    Muscle aerobic stress as measured by near infrared spectroscopy

  6. Change in body composition [ Time Frame: Baseline to 11 weeks ]
    Fat and fat free regional and total mass as measured by dual x-ray absorptiometry

  7. Change in maximal power production [ Time Frame: Baseline to 11 weeks ]
    The ability to produce power as determined on the cycle ergometer and measured in watts


Secondary Outcome Measures :
  1. Change in cardiovascular risk factors [ Time Frame: Baseline to 11 weeks ]
    Flow mediated dilation and pulse wave velocity

  2. Change in urolithins [ Time Frame: Baseline, 2 hrs after consuming first pomegranate or placebo supplement ]
    The ability to breakdown the beneficial components of pomegranate juice into urolithins is different among individuals

  3. Change in Microbiome [ Time Frame: Baseline, week 10 and week 15 ]
    The change in the gut microbiota as a result of supplementation with pomegranate juice.

  4. Change in maximal isometric strength [ Time Frame: Baseline to 11 weeks ]
    The maximal ability to push against a immovable object as measured in the thigh musculature

  5. Change in functional tests of living [ Time Frame: Baseline to 11 weeks ]
    Movement tasks specific to the daily life of the elderly

  6. Change in isokinetic torque [ Time Frame: Baseline to 11 weeks ]
    The subject will exert maximal leg extension at two speeds and the maximal torque generated will be quantified



Information from the National Library of Medicine

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Ages Eligible for Study:   50 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • 50-70 year old male and females

Exclusion Criteria:

  • not currently exercising regularly
  • meets criteria for MRI scanning at Imaging Research Center at UT Austin
  • history of heart disease
  • knee/hip joint problems
  • determination by the physician monitoring pre inclusion stress test

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03258346


Locations
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United States, Texas
Human Performance Laboratory
Austin, Texas, United States, 78712
Sponsors and Collaborators
University of Texas at Austin
POM Wonderful LLC
Investigators
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Principal Investigator: Edward F Coyle, PhD UT Austin
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Responsible Party: University of Texas at Austin
ClinicalTrials.gov Identifier: NCT03258346    
Other Study ID Numbers: 2017-05-0092
First Posted: August 23, 2017    Key Record Dates
Last Update Posted: February 20, 2019
Last Verified: February 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by University of Texas at Austin:
Pomegranate Juice
Functional Tasks of Living
Additional relevant MeSH terms:
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Sarcopenia
Muscular Atrophy
Neuromuscular Manifestations
Neurologic Manifestations
Nervous System Diseases
Atrophy
Pathological Conditions, Anatomical