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CompletedNCT00950937Updated Aug 11, 2009Results posted

Exercise, Oxidative Stress and HIV

An observational study in HIV Infections, sponsored by Hospital de Clinicas de Porto Alegre. Completed at 1 site in Brazil. Open to participants aged 20 Years to 55 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2009-08-11.

Sponsored by Hospital de Clinicas de Porto Alegre · Observational

Study type
Observational
Model
Case-control
Time perspective
Prospective
Enrollment
28
Ages
20 Years to 55 Years
Sex
All
01

Study summary

The purpose of this study is to compare oxidative stress markers and the immunologic characteristics of HIV-infected and non-HIV subjects during a bout of moderate aerobic exercise followed by resistance exercises

02

Conditions studied

  • HIV Infections

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03

In context

HIV Infections

4,340 studies on the registry are indexed under HIV Infections; 240 are open to participants now.

This study's enrollment of 28 is below the median of 200 across 731 observational studies indexed under HIV Infections.

Browse HIV Infections studies →

Lead sponsor

Hospital de Clinicas de Porto Alegre is the lead sponsor of 456 studies on the registry; 61 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
20 Years to 55 Years
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

The participants of the HIV group were recruited at the outpatient HIV/AIDS care unit of the Hospital de Clínicas de Porto Alegre (HCPA), whereas the control group (non-HIV) was formed by volunteers of the city of Porto Alegre, Rio Grande do Sul, Brazil

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • HIV Group:without contraindications for exercise training; to highly active antiretroviral therapy (HAART) for at least 6 months before enrollment; be classified as low level of physical activity by international physical activity questionnaire (IPAQ) and did not use antioxidant supplements.
  • Control Group:negative result for HIV-1 test and the other criteria described above

Exclusion criteria

Exclusion Criteria:

  • Subjects with previous history of cardiovascular and neurological disease, diabetes, dyslipidemia, tobacco using, physical disability and pregnant women were excluded from the study.
05

Study design

Observational model
Case-control
Time perspective
Prospective
Enrollment
28 participants (actual)

Groups and cohorts

  • HIV Group

    HIV infected persons

  • Control Group

    Non HIV-infected persons

06

What researchers measure

Primary outcomes

  1. Total Glutathione

    The total glutathione content in erythrocyte concentrate at three moments: baseline, aerobic and resistance exercise.

    Time frame: 3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).

Secondary outcomes

  1. Catalase Activity

    Antioxidant activity of the catalase enzyme at three moments: baseline, aerobic and exercise.

    Time frame: 3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).

  2. Glutathione S-transferase (GST)

    Antioxidant activity of the Glutathione S-transferase enzyme at three moments: baseline, aerobic and resistance exercise.

    Time frame: 3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).

  3. Lipid Peroxidation

    Thiobarbituric acid-reactive substances (TBARS) assay was used as an index of lipid peroxidation in erythrocytes, at three moments: baseline, aerobic and resistance exercise.

    Time frame: 3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).

  4. T CD4

    T CD4 lymphocytes counts at three moments: baseline, aerobic and resistance exercise.

    Time frame: 3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).

  5. Neutrophil Count

    Neutrophil count at three moments: baseline, aerobic and resistance exercise.

    Time frame: 3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).

  6. Peak Oxygen Uptake

    Is the maximum capacity of an individual's body to transport and utilize oxygen during incremental exercise.

    Time frame: 1 time, before the exercise protocol

07

Results

Posted Aug 3, 2009

Participant flow

Participant flow — Overall Study
MilestoneHIV GroupControl Group
Started1414
Completed1414
Not completed00

Outcome measures

SecondaryCatalase Activity

Antioxidant activity of the catalase enzyme at three moments: baseline, aerobic and exercise.

Time frame:
3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).
Reported as:
Median · units of catalase /mg protein
Catalase Activity
units of catalase /mg proteinHIV GroupControl Group
Baseline0.578 (0.049 to 1.338)0.967 (0.312 to 2.322)
Aerobic1.03 (0.316 to 2.598)0.855 (0.087 to 1.688)
Resistance0.566 (0.317 to 3.510)1.009 (0.333 to 2.096)
Statistical analysis
  • HIV Group vs Control Group · Wilcoxon (Mann-Whitney) · p = <0.05Wilcoxon test was utilized to compare the three moments: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance.
  • HIV Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
  • Control Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
PrimaryTotal Glutathione

The total glutathione content in erythrocyte concentrate at three moments: baseline, aerobic and resistance exercise.

Time frame:
3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).
Reported as:
Median · nmoles glutathione/ ml of sample
Total Glutathione
nmoles glutathione/ ml of sampleHIV GroupControl Group
Baseline1,964 (319 to 2,577)3,490 (597 to 7,596)
Aerobic1,865 (780 to 5,006)3,995 (2,308 to 6,068)
Resistance1,767 (516 to 2,420)3,206 (2,456 to 7,202)
Statistical analysis
  • HIV Group vs Control Group · Wilcoxon (Mann-Whitney) · p = <0.05Wilcoxon test was utilized to compare the three moments: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance.
  • HIV Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
  • Control Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
SecondaryGlutathione S-transferase (GST)

Antioxidant activity of the Glutathione S-transferase enzyme at three moments: baseline, aerobic and resistance exercise.

Time frame:
3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).
Reported as:
Median · micromol of GST/min/mg of protein
Glutathione S-transferase (GST)
micromol of GST/min/mg of proteinHIV GroupControl Group
Baseline0.34 (0.18 to 0.58)0.5 (0.42 to 0.56)
Aerobic0.34 (0.09 to 0.42)0.36 (0.34 to 0.51)
Resistance0.45 (0.31 to 0.63)0.46 (0.43 to 0.65)
Statistical analysis
  • HIV Group vs Control Group · Wilcoxon (Mann-Whitney) · p = <0.05Wilcoxon test was utilized to compare the three moments: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance.
  • HIV Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
  • Control Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
SecondaryLipid Peroxidation

Thiobarbituric acid-reactive substances (TBARS) assay was used as an index of lipid peroxidation in erythrocytes, at three moments: baseline, aerobic and resistance exercise.

Time frame:
3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).
Reported as:
Median · picomol of TBARS/mg protein
Lipid Peroxidation
picomol of TBARS/mg proteinHIV GroupControl Group
Baseline2.356 (1.27 to 3.12)2.888 (1.118 to 5.002)
Aerobic2.328 (0.909 to 2.922)4.164 (2.763 to 6.790)
Resistance2.348 (0.917 to 3.794)3.205 (1.753 to 6.840)
Statistical analysis
  • HIV Group vs Control Group · Wilcoxon (Mann-Whitney) · p = <0.05Wilcoxon test was utilized to compare the three moments: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance.
  • HIV Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
  • Control Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
SecondaryT CD4

T CD4 lymphocytes counts at three moments: baseline, aerobic and resistance exercise.

Time frame:
3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).
Reported as:
Median · Cell/ul of blood
T CD4
Cell/ul of bloodHIV GroupControl Group
Baseline417 (116 to 1132)984 (594 to 2145)
Aerobic428 (70 to 811)968 (553 to 1387)
Resistance378 (70 to 981)974 (643 to 1411)
Statistical analysis
  • HIV Group vs Control Group · Wilcoxon (Mann-Whitney) · p = <0.05Wilcoxon test was utilized to compare the three moments: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance.
  • HIV Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
  • Control Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
SecondaryNeutrophil Count

Neutrophil count at three moments: baseline, aerobic and resistance exercise.

Time frame:
3 times - baseline (before the peak oxygen uptake test), aerobic (immediately after aerobic exercise) and resistance (immediately after resistance exercise).
Reported as:
Median · Cell/ul of blood
Neutrophil Count
Cell/ul of bloodHIV GroupControl Group
Baseline3,237 (1,901 to 4,207)3,212 (2,328 to 4,174)
Aerobic3,285 (1,610 to 5,476)3,476 (2,184 to 9,236)
Resistance3,511 (1,531 to 5,977)3,563 (2,422 to 9,214)
Statistical analysis
  • HIV Group vs Control Group · Wilcoxon (Mann-Whitney) · p = <0.05Wilcoxon test was utilized to compare the three moments: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance.
  • HIV Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
  • Control Group · Friedman Test · p = <0.05Friedman to compare: baseline vs. aerobic, baseline vs. resistance and aerobic vs. resistance. Wilcoxon was applied to locate the differences
SecondaryPeak Oxygen Uptake

Is the maximum capacity of an individual's body to transport and utilize oxygen during incremental exercise.

Time frame:
1 time, before the exercise protocol
Reported as:
Median · ml/min
Peak Oxygen Uptake
ml/minHIV GroupControl Group
Peak Oxygen Uptake1,673 ± 3492,167 ± 597
Statistical analysis
  • HIV Group vs Control Group · t-test, 2 sided · p = <0.05Paired t-test was utilized to compare the two groups (HIV group and Control group)

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)HIV GroupControl GroupTotal
<=18 years000.0
Between 18 and 65 years141428.0
>=65 years000.0
Age Continuous
Age Continuous(years)HIV GroupControl GroupTotal
Mean39.2 ± 8.736 ± 10.637.5 ± 9.5
Sex: Female, Male
Sex: Female, Male(Participants)HIV GroupControl GroupTotal
Female7714.0
Male7714.0
Region of Enrollment
Region of Enrollment(participants)HIV GroupControl GroupTotal
Brazil141428.0
08

Study locations

1 site
  • Outpatient HIV/AIDS care unit of the Hospital de Clínicas de Porto Alegre
    Porto Alegre, Rio Grande do Sul 90035-903, Brazil
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 11, 2009, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00950937
First posted
Aug 3, 2009
Start date
Jun 2006
Primary completion
Jan 2007
Completion
Jul 2008
Results posted
Aug 3, 2009
Last update
Aug 11, 2009

Study contacts

Pedro Dall'Ago, Professor
principal investigator · Hospital de Clinicas de Porto Alegre

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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