Effects of Exercise in People With Paraplegia

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. Identifier: NCT01203150
Recruitment Status : Completed
First Posted : September 16, 2010
Last Update Posted : March 24, 2015
Information provided by (Responsible Party):
Mark S. Nash, Ph.D., FACSM, University of Miami

Brief Summary:
This hypothesis-driven study will investigate effects of physical activity with or without a nutrient supplement known to increase body lean mass in adults with chronic paraplegia who have clusters of obesity and obesity-related secondary complications.

Condition or disease Intervention/treatment Phase
Spinal Cord Injury Other: Exercise Not Applicable

Detailed Description:

Obesity and obesity-related secondary complications are pandemic health hazards that are highly prevalent among persons with spinal cord injuries (SCI). Accumulation of body fat disposes persons with SCI to accelerated endocrine and cardiovascular diseases, as well as pain, functional decline, and diminished health-related quality of life (HRQoL). While use of combined resistance and endurance exercise by persons without disability can remedy many of the problems associated with these disorders, their widespread use for persons with spinal cord injuries (SCI) must first satisfy scientific burdens of effectiveness.

The investigators have adopted the term "obesity-related secondary complications" to describe accumulation of body fat clustering with other secondary CVD risks, while recognizing that a threshold criterion for diagnosis of obesity in persons with SCI remains ill-defined. For purposes of this proposal, the "-related" part of the term confers physical deconditioning, hypertension, fasting dyslipidemia, post-prandial lipemia (PPL), and impaired insulin sensitivity, all of which have been reported in persons with SCI. Contextualized, any of these risks occurring independently or in clusters would be cause for immediate therapeutic lifestyle intervention (TLI), if not frank medical treatment. Given our early understanding of effective treatments for these risks, any improvement in their severity would be CVD risk-reducing and thus life-benefiting and function-preserving.

The investigators expect that the research findings will improve the understanding of risks for obesity and obesity-related secondary complications so that future interventions can be better targeted, identify an exercise intervention that can attend to current health risks, clarify whether nutrient supplementation improves risk-lessening benefits of exercise, identify exercise timing and intensities that best enhance fat utilization, and expand the understanding of the interrelated nature of risk factors after SCI.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 32 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Exercise Treatment of Obesity-Related Secondary Conditions in Adults With Paraplegia
Study Start Date : October 2008
Actual Primary Completion Date : September 2012
Actual Study Completion Date : September 2012

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Supplement
Participants randomized to the 'supplement' arm will consume a blended drink containing 48g of ionexchange, hydrolyzed vanilla-flavored whey protein (Whey to Go, Solgar Vitamin and Herb, Leonia, NJ; 3g CH2O, < 3g Total Fat). The drink will be given in split doses immediately before and after each training session, which represents a timing schedule that best stimulates muscle anabolism in persons undergoing exercise training.
Other: Exercise
CRT will occur 3 times per week for 26 weeks. Each training session will last approximately 40-45 minutes and employ resistance training (weight lifting) and high-speed, low intensity endurance activities (arm cranking) with interposed periods of incomplete recovery (i.e., heart rate not falling to baseline).
Other Name: Circuit Resistance Training (CRT)

Placebo Comparator: Placebo
As ingestion of the protein supplement is critically influenced by time of administration, participants assigned to the 'placebo' study arm will consume the identical supplement and dose on days during which training is not performed. This strategy will allow the groups to be isocaloric and equal in protein supplementation.
Other: Exercise
CRT will occur 3 times per week for 26 weeks. Each training session will last approximately 40-45 minutes and employ resistance training (weight lifting) and high-speed, low intensity endurance activities (arm cranking) with interposed periods of incomplete recovery (i.e., heart rate not falling to baseline).
Other Name: Circuit Resistance Training (CRT)

Primary Outcome Measures :
  1. Global cardiovascular disease risk score [ Time Frame: 4 visits over 9 months ]
    Global cardiovacular disease risk will be generated by evaluating blood metabolism in the fasting and fed state for inflammatory disease markers including total cholesterol: high density lipoprotein ratio (TC: HDL ratio), post-prandial lipemia (PPL), whole body fat oxidation (WBFO), insulin resistance, and inflammatory mediators.

Secondary Outcome Measures :
  1. Body composition [ Time Frame: 4 visits over 9 months ]
    The percent of muscle and fat in each participants' body will be measured by dual x-ray absorptiometry (DEXA) scan.

  2. Cardiovascular Endurance [ Time Frame: 4 visits over 9 months ]
    Endurance will be measured using a calibrated upper arm ergometer. An initial exercise workload of 0 Watts at 60 revolutions per minute (RPM) for three minutes will be followed by three minute stages increasing in 20 Watt increments. Responses to exercise will be continuously monitored via open-circuit spirometry and 12-lead electrocardiography. Peak Work will be defined as volitional fatigue, inability to maintain targeted workload, or the point at which increasing workload fails to further increase VO2.

  3. Muscular strength [ Time Frame: 8 visits over 9 months ]
    Upper extremity dynamic strength testing will be performed on a Helms equalizer 1000 multi-station exerciser using the following maneuvers: overhead press, horizontal row, vertical butterfly, biceps curl, latissimus pull down (either to the chest or neck), and dips. The 1-repetition maximum (1-RM) will be calculated using the Mayhew regression equation.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • SCI resulting in paraplegia between T5 and L1
  • injury for more than one year
  • American Spinal Injury Association Impairment Scale (AIS) grade A-C injuries
  • BMI ≥ 23 kg/m2 (defined by studies as the equivalent to the WHO criterion of 25 kg/m2 as 'overweight', and the point at which health risks begin to increase), plus any two or more of the following conditions on screening:

    1. prehypertension (BP ≥ 120/80 mmHg) by updated AHA and ADA criteria
    2. dyslipidemia (HDL-C ≥ 40 mg/dL or TG ≤ 150 mg/dL) by NCEP ATP III Guidelines,44 or
    3. impaired fasting glucose (≥ 100 mg/dL) by 2006 ADA criteria.

Exclusion Criteria:

  • surgery within 6 months
  • pressure ulcer within 3 months
  • upper limb pain that limits exercise
  • recurrent acute infection or illness requiring hospitalization or IV antibiotics
  • pregnancy
  • previous myocardial infarction or cardiac surgery
  • 6 month history of glucose lowering and lipid-lowering drug therapy
  • Type I or II diabetes (by WHO criteria)
  • daily intake of vitamin supplements exceeding 100% RDA
  • The following medications and drug therapies will disqualify subjects from participating: beta-adrenergic antagonists, maintenance alpha-blockers, Methyldopa, thiazide and loop diuretics, parasympatholytic agents, zinc, estrogen/hormone replacement therapy excluding oral contraceptives, insulin-sensitizing drugs, and maintenance use of aspirin and nonsteroidal anti-inflammatory drugs.

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 identifier (NCT number): NCT01203150

United States, Florida
The Miami Project to Cure Paralysis
Miami, Florida, United States, 33136
Sponsors and Collaborators
University of Miami
Principal Investigator: Mark S Nash, PhD University of Miami Miller School of Medicine, The Miami Project to Cure Paralysis

Responsible Party: Mark S. Nash, Ph.D., FACSM, Professor, University of Miami Identifier: NCT01203150     History of Changes
Other Study ID Numbers: TMP-MN-006
First Posted: September 16, 2010    Key Record Dates
Last Update Posted: March 24, 2015
Last Verified: March 2015

Additional relevant MeSH terms:
Spinal Cord Injuries
Spinal Cord Diseases
Central Nervous System Diseases
Nervous System Diseases
Trauma, Nervous System
Wounds and Injuries
Neurologic Manifestations
Signs and Symptoms