Effectiveness of Resistance Training in People With Down Syndrome: Systematic Review and Meta-Analysis.

The included trials had low to moderate methodological quality: seven had PEDro scores of 6 to 8 and seven had scores of 4 to 5. Allocation concealment and detection bias were common problems, and participants or therapists were rarely blinded. The training protocols varied widely, including machines, bands, body weight, circuits, balance work, conventional physiotherapy and plyometrics, so it is hard to know which part of the programme mattered. Many trials did not report sets, repetitions, rest intervals or session duration. This makes dose-response conclusions difficult. The physical function result rested on two trials, and its component tests were individually inconclusive. The work-task and cardiorespiratory meta-analyses also used two trials each and were inconclusive. Most participants were male, and five studies included only men, so female responses are not well represented. There was no dietary control, which confounds body-composition outcomes. Some control groups received active programmes, such as social programmes, conventional physiotherapy or aerobic exercise, not no intervention. Age ranged from 7 to 50 years, so results may not apply equally to children and adults. The strength meta-analysis showed heterogeneity (I2 = 72%).

Do not conclude that resistance training alone changes body size, heart and breathing capacity, or work tasks. The pooled strength result was positive, but those pooled analyses were inconclusive. Some trials combined resistance training with balance work, conventional physiotherapy or plyometrics, so the review cannot separate the contribution of each component.