International Journal of Sports Physiology and Performance,
Год журнала:
2023,
Номер
18(11), С. 1275 - 1282
Опубликована: Авг. 23, 2023
Laboratory-based
indicators
are
commonly
used
for
performance
assessment
in
young
cyclists.
However,
evidence
supporting
the
use
of
these
mostly
comes
from
cross-sectional
research,
and
their
validity
as
predictors
potential
future
remains
unclear.
We
aimed
to
assess
role
laboratory
variables
predicting
transition
U23
(under
23
y)
professional
category
cyclists.Sixty-five
male
road
cyclists
(19.6
[1.5]
were
studied.
Endurance
(maximal
graded
test
simulated
8-min
time
trial
[TT]),
muscle
strength/power
(squat,
lunge,
hip
thrust),
body
composition
(assessed
with
dual-energy
X-ray
absorptiometry)
determined.
Participants
subsequently
followed
categorized
attending
whether
they
had
transitioned
("Pro")
or
not
("Non-Pro")
during
study
period.The
median
follow-up
period
was
3
years.
Pro
(n
=
16)
showed
significantly
higher
values
than
Non-Pro
riders
49)
ventilatory
thresholds,
peak
power
output,
oxygen
uptake,
TT
(all
P
<
.05,
effect
size
>
0.69)
lower
levels
fat
mass
bone
mineral
content/density
(P
0.63).
no
significant
differences
found
49).
The
most
accurate
individual
predictor
(overall
predictive
value
76%
a
cutoff
5.6
W·kg-1).
some
that
did
reach
statistical
significance
univariate
analyses
contributed
multivariate
model
(R2
.79,
overall
94%).Although
different
"classic"
laboratory-based
endurance
can
predict
reaching
cyclists,
practical
indicator
such
8-minute
highest
prediction
accuracy.
Scientific Journal of Sport and Performance,
Год журнала:
2025,
Номер
4(2), С. 247 - 256
Опубликована: Март 25, 2025
Muscular
power
is
a
critical
determinant
of
performance
in
athletic
competitions
and
thus
identifying
methods
to
maximize
this
attribute
imperative.
Grunting
(GR)
may
be
an
effective
way
increase
during
high-velocity,
explosive
movements.
The
purpose
the
current
investigation
was
determine
effects
GR
on
muscular
output.
Twenty-four
subjects
were
recruited
from
local
martial
arts
academy.
Each
subject
had
minimum
2
years
experience.
measures
included
five
maximal
cross
punches
(CR)
roundhouse
kicks
(RH)
peak
output
three
countermovement
vertical
jumps
(CMJ)
seated
landmine
throws
(SLT).
In
randomized
order,
performed
these
tests
under
breathing
conditions
which
held
breath
(HB),
audible
exhale
(AE),
GR.
When
compared
AE
HB
conditions,
increased
CR
RH
CMJ
height
but
not
SLT.
at
increasing
force
production
striking
experienced
artists.
BMJ Open Sport & Exercise Medicine,
Год журнала:
2023,
Номер
9(3), С. e001672 - e001672
Опубликована: Авг. 1, 2023
Objectives
This
study
aims
to
quantitatively
evaluate
whether
there
are
muscle
mass
differences
between
male
and
female
recreational
cyclists
compare
quality
body
composition
in
the
pelvis
region
two
well-matched
groups
of
fit
healthy
adults.
Methods
cross-sectional
involved
45
42
cyclists.
The
inclusion
criteria
for
both
were
have
cycled
more
than
7000
km
last
year,
an
absence
injuries
other
health
problems,
no
contraindication
MRI,
be
30–65
years
old.
Our
main
outcome
measures
fat
fraction,
as
a
measure
intramuscular
(IMF)
content,
volume
gluteal
muscles
measured
using
Dixon
MRI.
subcutaneous
adipose
tissue
(SAT)
was
evaluated
secondary
measure.
Results
We
found
that
sex
IMF
content
gluteus
maximus
(GMAX,
p=0.42),
medius
(GMED,
p=0.69)
minimus
(GMIN,
p=0.06)
muscles,
despite
females
having
SAT
(p<0.01).
Males
had
larger
(p<0.01),
but
when
normalised
by
weight
p=0.54;
GMED,
p=0.14;
GMIN,
p=0.19).
Conclusions
shows
recognised
hormonal
males
females,
is
equivalence
matched
exercise
weight.
new
MRI
provides
key
information
better
understand
similarities
skeletal
sexes.
Medicine & Science in Sports & Exercise,
Год журнала:
2023,
Номер
55(11), С. 2053 - 2063
Опубликована: Июнь 1, 2023
This
study
investigated
the
development
of
power
profiles
and
performance-related
measures
from
junior
level
(<19
yr)
via
U23
(19-23
to
senior
(>23
in
19
female
100
male
Norwegian
national
team
cyclists.A
total
285
tests
were
performed
a
3-d
laboratory-standardized
testing
regime.
The
included
with
shorter
duration
(6-60
s)
longer
durations
(12-30
min)
together
measures:
critical
(CP),
work
capacity
above
CP
(W'),
output
at
4
2
mmol·L
-1
[BLa
-
]
(L
L
),
maximal
aerobic
(W
max
oxygen
uptake
(V̇O
2max
gross
efficiency
(GE),
pedaling
efficiency.Females
males
evolve
similarly
when
maturing
categories
(all
P
>
0.07),
except
for
V̇O
,
which
increased
females
(but
not
males)
(534
±
436
mL·min
=
0.013).
In
general,
only
performances
improved
age
(12
30
min,
0.028
0.042,
respectively).
Performance-related
like
W
CP,
fresh
state
≤
0.025).
Importantly,
performance
semifatigued
during
5-min
test
was
also
(
0.045)
despite
higher
external
energy
expenditure
before
0.026).Junior
cyclists
show
highly
developed
sprint
abilities,
primary
improvements
absolute
outputs
are
seen
>60
s
categories.
However,
durability,
i.e.,
maintain
state,
is
age.
Sports,
Год журнала:
2024,
Номер
12(2), С. 40 - 40
Опубликована: Янв. 28, 2024
This
study
focused
on
comparing
metabolic
thresholds
derived
from
local
muscle
oxygen
saturation
(SmO2)
signals,
obtained
using
near-infrared
spectroscopy
(NIRS),
with
global
pulmonary
ventilation
rates
measured
at
the
mouth.
It
was
conducted
among
various
Age
Groups
within
a
well-trained
cyclist
population.
Additionally,
examined
how
cycling
performance
characteristics
impact
discrepancies
between
ventilatory
(VTs)
and
SmO2
breakpoints
(BPs).
Methods:
Junior
(n
=
18)
Senior
15)
cyclists
underwent
incremental
tests
to
assess
their
aerobic
determine
(AeT)
anaerobic
(AnT)
threshold
through
gas
exchange
changes
in
linearity
of
vastus
lateralis
(VL)
signals.
We
compared
relative
power
(Pkg)
(BPs)
for
nondominant
(ND),
dominant
(DO),
bilaterally
averaged
(Avr)
during
agreement
analysis.
30
s
sprint
test
performed
estimate
capabilities
cyclists’
phenotype,
defined
as
ratio
P@VT2
highest
5
power.
Results:
The
Pkg@BP
Avr
had
higher
VT
values
than
ND
DO.
Pkg@BP1
lower
(p
<
0.05)
Pkg@VT1
(mean
bias:
0.12
±
0.29
W/kg;
Limits
Agreement
(LOA):
−0.45
0.68
R2
0.72)
mainly
Seniors
(0.21
0.22
LOA:
−0.22
0.63
W/kg);
there
no
difference
>
Pkg@BP2
Pkg@VT2
(0.03
−0.40
0.45
0.86).
bias
two
methods
correlated
significantly
phenotype
(r
−0.385
r
−0.515
AeT
AnT,
respectively).
Conclusions:
Two
can
be
NIRS-captured
signal
VL,
but
individual
level
too
low
interchangeable
usage
those
practical
training
process.
Older
generally
exhibited
earlier
oxygenation
signals
systemic
responses,
unlike
younger
who
showed
greater
variability
significant
differences
this
regard
evaluation
methods.
More
sprinter-type
tended
have
NIRS-derived
athletes
relatively
abilities.
Frontiers in Sport Research,
Год журнала:
2024,
Номер
6(2)
Опубликована: Янв. 1, 2024
Sports
training
as
a
field
of
study
has
advanced
greatly
in
recent
years.
One
reason
for
this
shift
is
the
growing
acceptance
concurrent
(CT),
method
that
simultaneously
improves
muscular
strength
and
cardiorespiratory
fitness.
The
potential
new
piqued
interest
sports
scientists
trainers,
leading
to
meta-analysis
systematic
review.
primary
purpose
review
was
determine
how
CT
affects
different
aspects
physical
fitness
it
translates
youth
athletic
performance.
findings
shed
lot
light
on
situation.
Not
only
been
demonstrated
be
superior
more
conventional
kinds
endurance
or
training,
but
also
shown
beneficial
raising
specific
indices.
performance
adolescents
who
were
given
significantly
higher
than
their
younger
counterparts.
adaptability
juvenile
body
by
disparity.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Июль 6, 2024
Abstract
The
aim
of
the
current
study
was
to
investigate
effects
ingesting
different
dosages
caffeine
(CAF)
prior
plyometric
jump
training
(PJT)
on
sport-related
performance
and
physiological
parameters
in
male
basketball
players.
Twenty-four
young
athletes
were
randomly
divided
into
3
groups
performed
6
weeks
PJT
while
consuming
mg·kg
–1
body
mass
(CAF3,
n
=
8),
(CAF6,
8)
or
placebo
(PL;
one
hour
each
session.
Before
after
6-week
PJT,
players
evaluated
for
field-based
basketball-specific
measures
(vertical
jump,
20-m
sprint,
Illinois
change
direction
speed
[CODS],
maximal
strength)
lab-based
(aerobic
capacity
anaerobic
power)
parameters.
CAF3,
CAF6,
PL
demonstrated
significant
improvements
vertical
(ES
1.07,
1.45,
1.1,
respectively),
sprint
–
0.50,
0.61,
0.36),
1.22,
1.26,
1.09),
strength
1.68,
2.29,
1.17),
maximum
oxygen
uptake
(V̇O
2max
)
1.09,
1.59,
0.92),
peak
1.82,
1.85,
0.82)
average
power
output
1.39,
1.32,
1.07)
training.
Comparative
analysis
individual
adaptive
responses
indicated
that
CAF6
led
insignificantly
greater
1.45),
2.29),
V̇O
1.59)
with
lower
residuals
changes
coefficient
variations
(CV)
mean
group
changes.
Regarding
CODS
performance,
both
experimental
similar
changes,
CVs
Overall,
induces
superior
adaptations
aerobic
fitness,
power,
sport-specific
measures,
inter-individual
variability
more
homogenized
over
period.
European Journal of Applied Physiology,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 24, 2024
Abstract
Purpose
To
analyze
the
influence
of
training
status
on
percentage
maximum
oxygen
consumption,
heart
rate
and
velocity
(%VO
2max
,
%HR
max
%V
)
at
which
ventilatory
threshold
1
2
occur
(VT1
VT2,
respectively),
in
males
females
separately
considering
age,
during
a
ramp
incremental
treadmill
test.
Methods
791
(36.8
±
9.9
years)
301
(33.9
11.0
performed
exercise
test
until
fatigue
where
VT1
VT2
were
determined.
Participants
classified
as
low,
medium
or
high
combining
consumption
VT1,
VO
by
clustering
analysis.
Results
is
poorly
correlated
with
%VO
(
r
<
0.3),
contrast,
there
positive
correlation
between
respectively,
=
0.203–0.615).
Furthermore,
we
observed
thresholds
greater
higher
(all
p
0.003).
Conclusion
The
physiological
determinants
are
more
related
to
than
.
Moreover,
due
individuals
status,
common
strategy
consisting
establishing
intensity
fixed
might
not
be
effective
match
across
different
status.
Clinical
trial
registration
NCT06246760.
International Journal of Sports Physiology and Performance,
Год журнала:
2023,
Номер
18(10), С. 1141 - 1144
Опубликована: Июнь 28, 2023
The
record
power
profile
(RPP)
has
gained
popularity
as
a
method
of
monitoring
endurance
cycling
performance.
However,
the
expected
variation
cyclists'
performance
between
seasons
remains
unknown.
We
aimed
to
assess
between-seasons
variability
peak
(assessed
through
RPP)
in
male
professional
cyclists.
Journal of the International Society of Sports Nutrition,
Год журнала:
2023,
Номер
20(1)
Опубликована: Янв. 15, 2023
The
effects
of
pre-sleep
protein
supplementation
on
endurance
athletes
remain
unclear,
particularly
whether
its
potential
benefits
are
due
to
the
timing
intake
or
solely
an
increased
total
intake.
We
assessed
in
professional
cyclists
during
a
training
camp
accounting
for
influence
timing.Twenty-four
U23
(19
±
1
years,
peak
oxygen
uptake:
79.8
4.9
ml/kg/min)
participated
six-day
camp.
Participants
were
randomized
consume
supplement
(40
g
casein)
before
sleep
(n
=
8)
afternoon
8),
isoenergetic
placebo
carbohydrates)
8).
Indicators
fatigue/recovery
(Hooper
index,
Recovery-Stress
Questionnaire
Athletes,
countermovement
jump),
body
composition,
and
performance
(1-,
5-,
20-minute
time
trials,
as
well
estimated
critical
power)
study
outcomes.The
resulted
significant
(p
<
0.001)
increase
loads
(e.g.
stress
score
659
122
per
week
preceding
month
versus
1207
camp),
which
induced
fatigue
indicators
effect
Hooper
index
p
decrease
power
0.002).
Protein
was
very
high
all
participants
(>2.5
g/kg
average),
with
significantly
higher
levels
found
two
groups
compared
group
0.001).
No
between-group
differences
any
analyzed
outcomes
(all
>
0.05).Protein
supplementation,
administered
earlier
day,
exerts
no
beneficial
short-term
strenuous
period
cyclists,
who
naturally
high-protein
diet.
Journal of Sports Science and Medicine,
Год журнала:
2023,
Номер
unknown, С. 25 - 33
Опубликована: Дек. 19, 2023
This
study
aimed
to
analyze
the
power
profile
(PP)
during
cycling
segment
of
international-level
triathletes
in
World
Triathlon
Series
(WTS)
and
Olympics
evaluate
influence
circuit
type,
race
distance
(Sprint
or
Olympic
distance)
dynamics
on
development
leg
final
position.
Four
male
participated
study.
Twenty
races
were
analyzed
using
geolocation
technology
power-meter
data
PP,
dynamics,
course
characteristics.
Before
races,
incremental
tests
volitional
exhaustion
with
gas
analysis
performed
determine
intensity
zones.
Nonparametric
Mann-Whitney
U
correlation
analyses
conducted
identify
differences
relationships
between
various
variables.
A
time
spent
above
maximal
aerobic
(MAP)
dangerous
curves
per
kilometer
(r
=
0.46;
p
<
0.05)
bike
split
result
(BSR)
-0.50;
was
observed.
Also,
moderate
found
BSR
position
0.01).
No
sprint
any
variable.
Power
output
variability,
influenced
by
technical
segments,
remains
main
characteristic
international
short-distance
races.
The
results
present
suggest
that
who
are
better
adapted
intermittent
high
efforts
perform
legs
at
high-level