We already know exercise is good for us, including our mental health, but we still have some questions. Like, what kind of exercise is best? And at what intensity?
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exercise do we need more evidence of its
benefits why not that's the topic of
this week's Healthcare
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triage this will be at least the third
video over Healthcare triages lifetime
that I have said something on the order
of this other than smoking there are few
modifiable risk factors that seem to
have as much of an impact on health as
physical exercise does we've got good
data on how beneficial exercise is for
physical health it improves outcomes for
people with osteoarthritis in the knee
and rheumatoid arthritis diabetes and
chronic pulmonary obstructive disease or
COPD exercise therapy can reduce not
just death from cardiac diseases but
death from all causes and a patient
suffering from Parkinson's disease and
multiple sclerosis exercise improves
Health rated quality of life measures
like physical function it helps with
chronic fatigue even an individual
suffering from fatigue due to cancer
treatments and then of course there's
mental Health which gets a huge Boost
from exercise and that's what we're
zeroing in on for this episode looking
at the literature the positive effect of
exercise on mental health is pretty
clear but the details are a bit fuzzy
some data suggest that intensity and
type of exercise matter while other data
do not to examine these questions
further a recent systematic review and
metaanalysis has attempted to give us
more insights to the research published
in February of 2024 the study compared
exercise to psychotherapy
anti-depressants and controls as a
treatment for major depression it
examined the results of 218 studies with
over 14,000 total participants above 18
years of age when compared to controls
like a placebo tablet exercise resulted
in a moderately larger decrease in
depression this held true for walking or
jogging yoga strength training and
exercise like taiichi but the strongest
effects were seen for strength training
and yoga the effects of all EX exercise
were proportional to intensity meaning
the more intense the exercise the
greater the decrease in depression the
anti-depressant effects of strength
training and cycling appear to be larger
for women while the effects of yoga
taiichi and aerobic exercise appear to
be larger for men older participants
appeared to benefit more from yoga and
aerobic exercise while younger
participants saw more benefit with
strength training the delivery of the
exercise may have a small impact as well
with exercise like yoga having greater
effects in a group setting and exercises
like strength training and mixed
aerobics having greater effects in an
individual setting while this held true
across people with different health
issues and different levels of
depression at Baseline it's important to
note that many of the studies were
judged to have some level of bias which
does lower confidence in the overall
conclusions the bias was largely related
to expectancy effects which were a
result of not blinding researchers and
participants to the conditions while all
trials examined in this meta analysis is
were randomized and controlled they were
not restricted to trials that blinded
the conditions when people participating
in experiment know which group they're
in meaning they're not blinded to
whether they're getting the experimental
treatment or the placebo their reports
in this case of depression levels can
change based on what they expect the
treatment or Placebo to do and in the
case of researchers what they rate
record Etc may change for the same
reasons if they know which condition
their participants are in another issue
is that not all studies included both
men and women and not all studies
included a range of Ages making the
conclusions on sex and age harder to pin
down with accuracy however even given
these kinds of limitations the evidence
based for exercise is strong enough
overall that we feel comfortable
advocating for it as one of the
Frontline treatments for both physical
and mental health but exercise isn't
often viewed as fun by most people so
what does the research say about getting
people to exercise we have a video on
that too too hey did you enjoy this
video you might enjoy this previous
video on how most Americans exercise
what about you we'd appreciate it if
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amiral Sam