Effects of Exercise in People With Paraplegia
Exercise Treatment of Obesity-Related Secondary Conditions in Adults With Paraplegia
Přehled studie
Detailní popis
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.
Typ studie
Zápis (Aktuální)
Fáze
- Nelze použít
Kontakty a umístění
Studijní místa
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Florida
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Miami, Florida, Spojené státy, 33136
- The Miami Project to Cure Paralysis
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Kritéria účasti
Kritéria způsobilosti
Věk způsobilý ke studiu
Přijímá zdravé dobrovolníky
Pohlaví způsobilá ke studiu
Popis
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:
- prehypertension (BP ≥ 120/80 mmHg) by updated AHA and ADA criteria
- dyslipidemia (HDL-C ≥ 40 mg/dL or TG ≤ 150 mg/dL) by NCEP ATP III Guidelines,44 or
- 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.
Studijní plán
Jak je studie koncipována?
Detaily designu
- Primární účel: Prevence
- Přidělení: Randomizované
- Intervenční model: Paralelní přiřazení
- Maskování: Žádné (otevřený štítek)
Zbraně a zásahy
Skupina účastníků / Arm |
Intervence / Léčba |
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Experimentální: 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.
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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).
Ostatní jména:
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Komparátor placeba: 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.
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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).
Ostatní jména:
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Co je měření studie?
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
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Global cardiovascular disease risk score
Časové okno: 4 visits over 9 months
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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.
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4 visits over 9 months
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Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
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Body composition
Časové okno: 4 visits over 9 months
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The percent of muscle and fat in each participants' body will be measured by dual x-ray absorptiometry (DEXA) scan.
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4 visits over 9 months
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Cardiovascular Endurance
Časové okno: 4 visits over 9 months
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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.
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4 visits over 9 months
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Muscular strength
Časové okno: 8 visits over 9 months
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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.
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8 visits over 9 months
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Spolupracovníci a vyšetřovatelé
Sponzor
Vyšetřovatelé
- Vrchní vyšetřovatel: Mark S Nash, PhD, University of Miami Miller School of Medicine, The Miami Project to Cure Paralysis
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia
Primární dokončení (Aktuální)
Dokončení studie (Aktuální)
Termíny zápisu do studia
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Odhad)
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Odhad)
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Více informací
Termíny související s touto studií
Další relevantní podmínky MeSH
Další identifikační čísla studie
- TMP-MN-006
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