The
aim
of
the
present
study
was
to
assess
sleep
timing
in
Drosophila
melanogaster
at
different
ages,
within
setting
an
enforced
schedule
varying
light-dark
stimuli,
simulating
light
exposure
variations
between
four
typical
office
working
days
and
one
free
day
spent
outside
by
a
human,
for
total
30
days.
Locomotor
activity
recording
started
when
male
flies
were
3
old.
Flies
exhibited
bimodal
pattern,
with
morning
evening
peak,
clear
anticipation
lights
on
off
transitions.
From
experimental
10
(i.e.
12-day-old
flies)
onwards,
decrease
counts/increase
amount
observed.
On
days,
rise
counts
reduction
during
interval
observed
also
present,
albeit
less
obvious,
subsequent
interval.
A
progressive
delay
onset
first
experiment,
peaking
4
6-day-old
flies),
after
which
gradually
advanced.
offset
13
stabilized.
In
conclusion,
'adolescent'
changes
that
reminiscent
those
human
adolescents.
JAMA Network Open,
Год журнала:
2025,
Номер
8(3), С. e252493 - e252493
Опубликована: Март 27, 2025
Importance
Electronic
screen
use
before
bed
may
disrupt
circadian
rhythms,
leading
to
poorer
sleep.
Objective
To
investigate
the
association
between
and
sleep
outcomes
among
adults.
Design,
Setting,
Participants
This
cross-sectional
study
included
participants
in
American
Cancer
Society
Prevention
Study–3,
a
prospective
cohort
of
men
women
from
35
US
states
Puerto
Rico,
who
responded
2018
survey.
Analyses
were
conducted
February
3,
2023,
January
10,
2025.
Exposures
Self-reported
electronic
hour
prior
bed.
Main
Outcomes
Measures
sleep-wake
times
(used
calculate
duration),
quality,
chronotype.
Mean
differences
for
duration
bedtimes,
prevalence
ratios
quality
calculated
by
using
multivariable
linear
Poisson
regression,
respectively.
Whether
these
associations
differed
chronotype
was
also
examined.
Results
Of
122
058
(97
658
[80.0%];
median
[IQR]
age,
56
[47-62]
years;
range,
27-85
years),
70
638
(57.9%)
reported
morning
Daily
50
289
(41.2%),
whereas
21
275
(17.4%)
no
use.
Compared
with
use,
daily
associated
33%
higher
poor
(prevalence
ratio,
1.33;
95%
CI,
1.27-1.39)
7.64
fewer
minutes
on
workdays
(95%
6.65-8.63
minutes).
The
more
pronounced
evening
chronotypes
(8.36
minutes;
4.94-11.78
minutes)
vs
those
(5.64
3.98-7.29
5.04
4.03-6.05
nonworkdays.
users
went
9.33
later
7.61-11.06
minutes),
15.62
11.93-19.31
workdays.
similar
Conclusions
Relevance
bedtimes
approximately
less
each
week.
Associations
greater
chronotypes,
are
at
risk
due
social
jetlag
(ie,
misalignment
rhythms
commitments).
These
findings
confirm
disruptions
screens
not
limited
children
adolescents.
Further
work
is
needed
understand
best
mechanisms
intervention.
Frontiers in Psychiatry,
Год журнала:
2025,
Номер
16
Опубликована: Март 31, 2025
Introduction
Screen
use
in
bed
has
become
a
widespread
habit,
particularly
among
young
people.
This
behavior
been
associated
with
poor
sleep,
some
studies
indicating
that
social
media
may
be
especially
detrimental.
However,
there
is
scarcity
of
research
directly
comparing
the
relationship
between
various
screen
activities
and
most
existing
focus
on
adolescents
rather
than
adults.
study
aims
to
explore
sleep
students,
specifically
other
screen-based
activities.
Methods
utilized
data
from
cross-sectional
Students’
Health
Wellbeing
Study
2022
included
n=45,202
participants
aged
18-28
years.
Regression
analyses
were
used
assess
time
Results
A
one-hour
increase
after
going
was
59%
higher
odds
having
symptoms
insomnia
reduction
duration
24
minutes.
The
associations
outcomes
did
not
differ
for
versus
Independent
time,
who
exclusively
had
lower
longer
compared
those
engaging
or
mix
Discussion
present
found
increased
linked
poorer
across
activity
type.
Future
should
refine
classifications,
specific
content,
employ
experimental
approaches
determine
causal
mechanisms.
