title: Effectiveness of aerobic exercise in adults living with HIV/AIDS: systematic review.
abstract: OBJECTIVE
  The objective of this systematic review was to examine the effectiveness and safety of aerobic exercise interventions on immunological/virological, cardiopulmonary, and psychological outcomes in adults living with HIV/AIDS.
  
  
  METHODS
  Ten randomized trials of HIV-positive adults performing aerobic exercise three times per week for at least 4 wk were identified by searching 13 electronic databases, abstracts from conferences, reference lists, and personal contact with authors from 1980 to November 2002. At least two independent reviewers assessed articles for inclusion, extracted data, and assessed methodological quality. Random effects models were used for meta-analysis.
  
  
  RESULTS
  Main results indicated that aerobic exercise was associated with small nonsignificant changes in CD4 count (weighted mean difference: 14 cells x mm(-3), 95% CI: -26, 54), viral load (weighted mean difference: 0.40 log10 copies, 95% CI: -0.28, 1.07), and VO2(max) (weighted mean difference: 1.84 mL x kg(-1) x min(-1), 95% CI: -0.53, 4.20). Individual studies suggested that aerobic exercise may improve psychological well-being for adults living with HIV/AIDS. These findings are limited to those participants who continued to exercise and for whom there was adequate follow-up.
  
  
  CONCLUSIONS
  In conclusion, performing constant or interval aerobic exercise, or a combination of constant aerobic exercise and progressive resistive exercise for at least 20 min, at least three times per week for 4 wk may be beneficial and appears to be safe for adults living with HIV/AIDS. However, these findings should be interpreted cautiously due to small sample sizes and large dropout rates within the included studies. Future research would benefit from increased attention to participant follow-up and intention-to-treat analysis.
authors.affiliation: Department of Physical Therapy, University of Toronto, Toronto, ON, Canada. kelly.obrien@utoronto.ca
authors.forename: Kelly
authors.initials: K
authors.lastname: O'Brien
authors.forename: Stephanie
authors.initials: S
authors.lastname: Nixon
authors.forename: Anne-Marie
authors.initials: AM
authors.lastname: Tynan
authors.forename: Richard H
authors.initials: RH
authors.lastname: Glazier
mesh_terms: D018791:CD4 Lymphocyte Count; D015444:Exercise; D015658:HIV Infections / Q000276:immunology / Q000523:psychology / Q000628:therapy*; D006801:Humans; D010101:Oxygen Consumption / Q000502:physiology; D016032:Randomized Controlled Trials as Topic