Comprehensive cardiopulmonary profile of individuals with Down syndrome.
Adults with Down syndrome have broad heart, lung, and muscle limits that keep sliding downhill.
01Research in Context
What this study did
Shire et al. (2022) tested adults with Down syndrome in a lab. They checked heart, lung, and muscle fitness all at once.
Each person wore a face mask and walked on a treadmill until they had to stop. The team compared every score to adults without disabilities.
What they found
The Down syndrome group scored lower on almost every measure. Their peak heart rate, oxygen use, and leg strength were all down.
The gap was large and showed up in all three systems together.
How this fits with other research
Wee et al. (2015) saw the same low peak heart rate years earlier. Y et al. widen the picture by adding lung and muscle data.
Boer (2024) followed adults for twelve years and found these scores keep dropping. The new study gives the baseline that decline starts from.
McQuaid et al. (2024) report that extra weight in Down syndrome adults does not raise normal metabolic risks. Y et al. now show the risks are still in the heart and lungs, not blood tests. Together the papers say: plan exercise for the heart-lung system even when labs look okay.
Why it matters
You now know the whole engine is weak, not just one part. Write goals that boost heart rate, breathing, and leg strength together. Start low, go slow, and track all three systems every quarter.
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02At a glance
03Original abstract
BACKGROUND: Individuals with Down syndrome (DS) have low levels of cardiorespiratory fitness and previous studies have shown that these low levels of fitness have a physiological cause. During exercise, the cardiovascular, ventilatory and muscular systems are simultaneously active. While individual parameters of these systems have been investigated in DS before, the interaction between these parameters and systems have not been discussed in detail. Doing so may provide important insight regarding the aetiology of low cardiorespiratory fitness and which parameters of the cardiovascular, pulmonary and muscular systems are altered in individuals with DS compared with their peers without DS. METHODS: Cardiopulmonary exercise tests were performed in healthy adults with and without DS. Parameters related to the cardiovascular, ventilatory and muscular systems were collected until VO2peak . In total, 51 participants were included in analysis, of which 21 had DS. RESULTS: Individuals with DS showed lower peak values for all collected outcomes (P ≤ 0.001) compared with those without DS, except for ventilatory threshold as a percentage of maximal oxygen uptake and VE /VCO2 slope, which were similar. CONCLUSIONS: Our results show that individuals with DS present impairments across the cardiovascular, ventilatory and muscular aspects of the cardiopulmonary system.
Journal of intellectual disability research : JIDR, 2022 · doi:10.1111/jir.12954