Journal of Applied Physiology,
Journal Year:
2023,
Volume and Issue:
135(4), P. 902 - 917
Published: Sept. 7, 2023
Following
acute
coronavirus
disease
2019
(COVID-19),
a
substantial
proportion
of
patients
showed
symptoms
and
sequelae
for
several
months,
namely
the
postacute
COVID-19
(PASC)
syndrome.
Major
phenomena
are
exercise
intolerance,
muscle
weakness,
fatigue.
We
aimed
to
investigate
physiopathology
intolerance
in
with
PASC
syndrome
by
structural
functional
analyses
skeletal
muscle.
At
least
3
mo
after
infection,
nonhospitalized
(
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(2)
Published: Sept. 26, 2023
Abstract
In
situ
dual‐modal
detection
of
electrophysiology
(EP)
and
blood
oxygen
(BO)
during
muscle–vascular
activity
is
crucial
for
healthcare
human–machine
interaction.
It
requires
an
integrated
monitoring
system:
a
transparent
electrode
EP
directly
adhered
to
skin
near‐infrared
spectroscopy
(NIRs)
layer
BO
detection.
particular,
the
multi‐channel,
highly
transparent,
stretchable
electrodes
should
be
well
developed.
this
study,
16‐channel
ionotronic
are
fabricated
based
on
printable
ionogel,
demonstrating
excellent
properties
such
as
high
transparency,
large
stretchability,
wet
adhesion,
biocompatibility,
softness,
long‐term
stability.
The
exhibits
stable
contact
impedance
24
h
2‐week
periodic
monitoring.
outperforms
gold
by
providing
with
minimal
interference
in
NIRs
An
negative
correlation
found
between
intensity
level
over
time.
This
study
paves
way
designing
ionotronics
synchronous
optical‐related
highlights
potential
use
system
coupling
neurocience
rehabilitation.
Frontiers in Physiology,
Journal Year:
2025,
Volume and Issue:
16
Published: Feb. 17, 2025
Purpose
The
purpose
of
this
study
was
to
analyze
changes
in
skeletal
muscle
oxygen
saturation
(SmO
2
)
kinetics
during
exercise
female
rowers
both
acutely
and
longitudinally
relation
blood
lactate
(BLa).
We
also
aimed
determine
the
agreement
statistical
equivalence
between
physiological
thresholds
derived
from
SmO
BLa
kinetics.
Methods
Twenty-three
NCAA
Division
I
were
tested
throughout
2023–2024
academic
year.
Of
these,
11
athletes
completed
at
least
two
near-infrared
spectroscopy
(NIRS)-equipped
GXTs,
with
data
analyzed
for
longitudinal
changes.
A
7x4-min
discontinuous
GXT
protocol
performed
by
all
athletes.
First
second
breakpoints
BP1
BP2)
estimated
via
piecewise
linear
regression
modeling,
(LT
1
LT
calculated
using
ADAPT
software.
Paired-samples
t-tests
assessed
differences,
one-sided
tests
(TOST).
Agreement
determined
Bland-Altman
analysis
yielding
mean
differences
(MD)
95%
limits
(LoA).
Intraclass
correlation
coefficients
(ICC
2,1
calculated.
Results
No
difference
found
BP2
(MD
=
−5.76W
[95%
LoA
−38.52
22.25W],
p
0.134),
moderate-to-good
levels
0.67
CI:
0.36–0.85],
<
0.001),
no
(p
0.117).
This
not
case
,
NIRS
significantly
underestimating
−8.14W
−38.90
27.37W],
0.026),
poor-to-moderate
0.24
−0.13–0.58],
0.10),
0.487).
Additionally,
recovery
resat)
1-min
rest
intervals
increased
response
graded
increases
intensity
0.001,
η
0.71),
higher
intensities
appearing
blunt
effect
(step
6
–
step
7:
MD
−0.16%⋅s
-1
0.69).
statistically
significant
observed
LT’s
or
BP’s
season.
Conclusion
In
collegiate
rowers,
may
be
a
tool
that
compliments
testing
when
determining
threshold
(i.e.,
).
However,
inter-individual
variablility
exists
LT2
paired
lack
suggest
are
interchangeable.
While
standalone
replacement,
if
used
combination
traditional
methods
complimentary
helps
inform
individual
athlete
training
zone
prescription.
Journal of Near Infrared Spectroscopy,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 3, 2025
Purpose:
Osteonecrosis
is
a
condition
resulting
from
the
death
of
bone
tissue
caused
by
loss
vascularization,
leading
to
exposure
necrotic
bone.
Noninvasive
optical
techniques
capable
evaluating
hemodynamic
status
as
near
infrared
(NIR)
spectroscopy
have
been
studied
for
diagnosis
osteonecrosis.
This
study
aims
highlight
studies
in
which
NIR
was
used
evaluate
characteristics,
discussing
its
usefulness
perfusion
In
this
narrative
review
16
PUBMED
were
selected,
that
provided
initial
evidence
pattern
normal
identified
different
spectral
found
injured
tissue.
These
suggest
also
has
reproducibility
and
associations
with
other
well-known
imaging
methodologies,
indicating
could
become
potential
technique
osteonecrosis
real
assessments
superficial
surfaces.
It
may
be
advantageous
early
asymptomatic
cases
lead
compromised
microcirculation.
Due
variability
between
data
available,
standard
normality
not
yet
established,
making
comparisons
patients
or
establishment
cutoff
value
hypoperfusion
states
difficult.
Experimental Physiology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 25, 2025
Abstract
This
study
aimed
to
evaluate
in
vivo
oxidative
capacity
and
relative
resistance
O
2
diffusion
using
near‐infrared
spectroscopy
(NIRS)
the
m.
triceps
brachii
of
recreational
world
class
swimmers
their
relationships
with
swimming
performance.
Twenty‐eight
were
enrolled
assigned
into
three
subgroups
according
level:
‘recreational/trained’
(Tier
1/2;
n
=
8),
‘national’
3;
12)
‘international/world
class’
4/5;
8).
Performance
was
evaluated
by
100
m
freestyle
trials.
Training
volume
measured
self‐reported
distance
(km/week).
The
recovery
k
non‐invasively
estimated
NIRS
through
repeated
intermittent
occlusions
under
two
conditions:
well‐oxygenated
(
HIGH
)
low
availability
LOW
).
difference
between
(Δ
calculated
as
an
index
diffusion.
FINA
points
performance
differed
among
all
groups.
greater
Tier
4/5
(34.0
±
5.5
km
week
−1
3
(35.5
11.6
than
1/2
(6.4
1.8
(3.18
0.41
2.79
0.40
min
versus
(2.10
0.36
;
P
<
0.002).
correlated
points,
training
volume.
∆
not
different
tiers
associated
or
M.
positively
swimmers.
,
which
reflects
diffusion,
athletes.
These
data
suggest
that
is
muscle
diffusing
exerts
a
similar
diffusive
flow
across
International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(4), P. 3670 - 3670
Published: Feb. 12, 2023
Hypoxia
is
a
life-threatening
challenge
for
about
1%
of
the
world
population,
as
well
contributor
to
high
morbidity
and
mortality
scores
in
patients
affected
by
various
cardiopulmonary,
hematological,
circulatory
diseases.
However,
adaptation
hypoxia
represents
failure
relevant
portion
cases
pathways
potential
often
conflict
with
well-being
generate
diseases
that
certain
areas
still
afflict
up
one-third
populations
living
at
altitude.
To
help
understand
mechanisms
maladaptation,
this
review
examines
steps
oxygen
cascade
from
atmosphere
mitochondria
distinguishing
patterns
related
physiological
(i.e.,
due
altitude)
pathological
pre-existing
disease)
hypoxia.
The
aim
assess
ability
humans
adapt
multidisciplinary
approach
correlates
function
genes,
molecules,
cells
physiologic
outcomes.
We
conclude
that,
most
cases,
it
not
itself
generates
diseases,
but
rather
attempts
condition.
This
underlies
paradigm
shift
when
becomes
excessive,
translates
into
maladaptation.
Scientific Reports,
Journal Year:
2023,
Volume and Issue:
13(1)
Published: April 26, 2023
Premature
birth
is
associated
with
endothelial
and
mitochondrial
dysfunction,
chronic
oxidative
stress,
which
might
impair
the
physiological
responses
to
acute
altitude
exposure.
We
assessed
peripheral
stress
high-altitude
exposure
in
preterm
adults
compared
term
born
controls.
Post-occlusive
skeletal
muscle
microvascular
reactivity
capacity
from
oxygen
consumption
recovery
rate
constant
(k)
were
determined
by
Near-Infrared
Spectroscopy
vastus
lateralis
of
seventeen
adults.
Measurements
performed
at
sea-level
within
1
h
arrival
(3375
m).
Plasma
markers
pro/antioxidant
balance
both
conditions.
Upon
exposure,
sea-level,
participants
exhibited
a
lower
reperfusion
(7
±
31%
vs.
30
30%,
p
=
0.046)
level,
but
higher
k
(6
32%
-15
21%,
0.039),
than
their
peers.
The
altitude-induced
increases
plasma
advanced
oxidation
protein
products
catalase
(35
61%
-13
48%
67
64%
15
61%,
0.034
0.010,
respectively)
xanthine
oxidase
(29
82%
159
162%,
0.030)
In
conclusion,
blunted
responsiveness,
larger
may
compromise
acclimatization
healthy
preterm.
Journal of Applied Physiology,
Journal Year:
2023,
Volume and Issue:
136(2), P. 298 - 312
Published: Dec. 7, 2023
To
further
refine
the
near-infrared
spectroscopy
(NIRS)-derived
measure
of
skeletal
muscle
oxidative
capacity
in
humans,
we
sought
to
determine
whether
exercise
stimulus
intensity
affected
τ
value
and/or
influenced
magnitude
correlations
with
vitro
measures
mitochondrial
content
and
vivo
indices
performance.
Males
(
