Time-course Changes of Field- and Laboratory-based Performance Indicators in Junior Cyclists Through a Season
International Journal of Sports Medicine,
Journal Year:
2023,
Volume and Issue:
45(06), P. 443 - 449
Published: Dec. 19, 2023
Abstract
This
study
aimed
to
assess
the
seasonal
evolution
of
field-based
and
laboratory-based
performance
indicators
in
cyclists.
Thirteen
Junior
male
road
cyclists
(age
17.4±0.5
years)
were
followed
up
during
a
season,
which
was
divided
three
phases:
early
season
(involving
mainly
training
sessions),
mid-season
(including
first
competitions),
late
major
competitions
season).
During
each
phase,
power
output
data
registered
for
assessment
maximum
mean
values,
endurance
(ramp
test
simulated
8-minute
time
trial),
muscle
strength/power
(squat,
lunge,
hip
thrust)
body
composition
(dual-energy
X-ray
absorptiometry)
also
assessed.
A
progressive
(p<0.01)
increase
values
(e.g.,
3.8±0.3
4.5±0.4
watts/kg
respectively,
60-minute
efforts)
on
trial
(i.e.,
5.3±0.3
5.6±0.4
watts/kg,
respectively)
observed
through
season.
Yet,
more
“traditional”
ventilatory
threshold,
respiratory
compensation
point,
or
oxygen
uptake)
seemed
show
ceiling
effect
beyond
mid-season.
In
addition,
neither
peak
output,
composition,
nor
strength
similar
pattern
aforementioned
indicators.
summary,
seem
sensitive
monitor
cyclists’
changes
actual
fitness
capacity
than
markers
Language: Английский
Effects of the Birthplace Altitude and Training Volume on Hematological Characteristics in Youth and Junior Male Colombian Cyclists
International Journal of Sports Physiology and Performance,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 6
Published: Jan. 1, 2024
Purpose
:
The
long-term
development
of
talent
in
endurance
sports
is
a
topic
interest.
Among
various
factors,
the
importance
total
hemoglobin
mass
(tHb
)
and
potential
benefits
being
an
altitude-native
athlete
remain
unclear,
particularly
young
categories.
This
study
aimed
to
investigate
impact
altitude
training
content
on
hematological
characteristics
by
comparing
male
cyclists
age
15–16
17–18
years
who
were
born
trained
at
moderate
(ie,
greater
than
or
equal
2500
m;
MA)
low
(below
1000
LA).
Methods
tHb
(in
grams
per
kilogram),
measured
using
optimized
carbon
monoxide
rebreathing
method
during
incremental
test
cycle
ergometer;
hematocrit
percentage,
concentration;
erythrocyte,
blood,
plasma
volume
youth
junior
MA
versus
LA.
All
variables
analyzed
with
2-way
(age
[youth
cyclist
vs
cyclist]
×
level
[MA
LA])
analysis
variance
subsequent
Tuckey
post
hoc
test.
Results
Conclusion
Some
altitude-induced
reported
group
higher
values
concentration,
(grams
kilogram)
(
P
<
.05)
their
LA
counterparts.
was
also
observed
.001),
except
for
,
wherein
no
significant
difference
found
between
groups.
In
contrast,
lower
cyclists.
New
Findings
(1)
birth
residence
could
generate
advantage
train
compared
are
(2)
Altitude-induced
physiological
(hematocrit
g·kg
−1
partially
years.
may
strategies
identifying
developing
cycling.
Language: Английский