Introduction
Compared
to healthy individuals,
stroke patients have five times the rate of
dementia diagnosis within three years. Aerobic exercise may induce
neuroprotective mechanisms that help to preserve, and even increase,
brain volume and cognition. We seek to determine whether aerobic fitness
training helps to protect brain volume and cognitive function after
stroke compared to an active, non-aerobic control.
Methods
In
this Phase IIb, single blind, randomised controlled trial, 100
ischaemic stroke participants, recruited at two months post-stroke, will
be randomly allocated to either the intervention (aerobic and strength
exercise) or active control (stretching and balance training).
Participants will attend one-hour, individualised exercise sessions,
three days-per-week for eight weeks. Assessments at two months
(baseline), four months (post-intervention), and one year (follow-up)
post-stroke will measure brain volume, cognition, mood,
cardiorespiratory fitness, physical activity, blood pressure and blood
biomarkers.
Study outcome: Our primary outcome measure is
hippocampal volume at four months after stroke. We hypothesise that
participants who undertake the prescribed intervention will have
preserved hippocampal volume at four months compared to the control
group. We also hypothesise that this group will have preserved total
brain volume and cognition, better mood, fitness, and higher levels of
physical activity, than those receiving stretching and balance training.
Discussion
The
promise of exercise training to prevent, or slow, the accelerated rates
of brain atrophy and cognitive decline experienced by stroke survivors
needs to be tested. Post Ischaemic Stroke Cardiovascular Exercise Study
has the potential, if proven efficacious,
to identify a new treatment
that could be readily translated to the clinic.
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