The
use
of
isolated
supplements
to
enhance
performance
is
widespread
among
athletes.
aim
this
study
was
increase
knowledge
about
the
combined
effects
caffeine
and
New
Zealand
blackcurrant
(NZBC)
dietary
supplements.
In
study,
two
subjects
each
underwent
four
phases
sessions
in
a
double-blind
randomized
alternating
treatment
single-case
design.
After
3-week
pre-test
phase,
supplement
combinations
placebo/placebo,
caffeine/placebo
(5
mg/kg),
NZBC/placebo
(600
mg),
caffeine/NZBC
mg/kg
+
600
mg)
were
taken
weekly
tests
conducted
examine
their
on
relative
power
(W/kg)
during
20-minute
time
trial
bicycle.
Data
analyzed
descriptively
using
Tau-U
calculator
from
Single
Case
Research.
ergogenic
effect
confirmed
both
subjects,
with
increases
3.3%
6.5%,
while
positive
NZBC
only
seen
one
subject
(13.4%).
combination
again
increased
(2.2%
19.2%),
but
data
showed
an
additive
subject.
Further
studies
are
required
confirm
or
refute
evidence
synergistic
these
Maximal
heart
rate
(HRmax)
is
a
widely
used
measure
of
cardiorespiratory
fitness.
Prediction
HRmax
an
alternative
to
cardiopulmonary
exercise
testing
(CPET),
but
its
accuracy
among
endurance
athletes
(EA)
requires
evaluation.
This
study
aimed
externally
validate
prediction
models
in
the
EA
independently
for
running
and
cycling
CPET.
4043
runners
(age=33.58
(8.12)
years;
83.53%
males;
BMI=23.66
(2.54)
kg·m−2)
1026
cyclists
(age=36.88
(9.03)
89.67%
BMI=24.04
(2.65)
underwent
maximum
Student
t-test,
mean
absolute
percentage
error
(MAPE),
(MAE),
root
square
(RMSE)
were
applied
8
5
equations.
was
184.60
(9.79)
beats·min−1
182.66
(10.28)
respectively
cycling,
p=0.001.
Measured
predicted
differed
significantly
(p=0.001)
9
13
(69.23%)
models.
overestimated
by
(61.54%)
underestimated
(38.46%)
formulae.
Overestimated
ranged
0.08-4.94
0.03-4.90
beats·min−1.
MAE
RMSE
0.18-4.94
9.13-10.47,
respectively.
MAPE
3.95-4.69%.
do
not
allow
accurate
estimation
HRmax.
more
often
than
overestimated.
Predicted
can
be
implemented
as
supplemental
method
CPET
preferable
approach.
Sports medicine research and practice,
Journal Year:
2024,
Volume and Issue:
13(4), P. 76 - 86
Published: Jan. 26, 2024
Aim
:
to
summarize
the
data
published
in
our
country
and
abroad
on
diagnosis
of
cardiac
complications
after
COVID‑19
compare
it
with
own
experience
examining
such
athletes.
Materials
methods
open
sources
as
eLibrary,
Scopus,
PubMed
etc.
were
used
a
scientific
base
achieve
set
goal,
meta-analysis
42
domestic
foreign
literature
was
carried
out
upon
results
post‑COVID
changes
Besides
that,
indicators
11467
athletes,
aged
from
16
45
years,
studied
who
have
been
playing
for
Moscow
national
team
passed
in‑depth
medical
examination
basis
Sports
Medicine
Clinic
Scientific
Practical
Center
Medical
Rehabilitation,
Restorative
Medicine.
Results
prevalence
myocarditis
mild
athletes
does
not
exceed
1
%,
arrhythmia
9
%.
Classical
cardiovascular
screening
is
sufficient
their
detection
most
cases.
If
hospitalization
necessary,
risks
increase
up
7.2
myocardial
infarction
4,7
other
3–14
%
require
advanced
diagnostics.
For
optimal
resource
management
healthcare
system,
working
algorithm
returning
trainings
previous
proposed.
Conclusion
cases
classical
enough
symptomatic
individuals
sports
COVID‑19.
However,
additional
examinations,
including
loading
tests
MRT,
are
required
find
possible
latent
ongoing
pathology
well
evaluate
prospects
athlete.
Frontiers in Public Health,
Journal Year:
2023,
Volume and Issue:
11
Published: Nov. 30, 2023
Introduction
An
adequate
level
of
cardiorespiratory
fitness
(CRF)
is
critical
for
firefighters
to
perform
the
strenuous
and
physiologically
demanding
work
firefighting
safely
effectively.
The
coronavirus
disease
2019
(COVID-19)
has
been
shown
negatively
impact
CRF
in
both
acute
phase
longer-term
following
infection.
This
study
aimed
determine
changes
pre-
post-mild
moderate
COVID-19
infection
investigate
days
past
on
change
CRF.
Methods
measures
from
cardiopulmonary
exercise
testing
(CPET)
at
annual
occupational
health
exams
that
occurred
pre-COVID-19
were
obtained
seven
Arizona
fire
departments.
Measures
compared
CPET
evaluations
year
a
cohort
who
self-reported
mild
illness
between
exams.
Results
Among
103
firefighters,
mean
age
40
±
9
years,
[as
measured
by
peak
oxygen
consumption
(VO
2
)]
declined
an
average
2.55
ml·kg
−1
·min
or
7.3%
(
d
=
−0.38,
p
<
0.001)
(mean
time
was
110
78
days).
number
showed
small,
yet
significant,
relationship
VO
r
0.250,
0.011).
Estimated
marginal
effects
indicated
when
biological
sex,
age,
BMI
are
controlled
for,
predicted
returned
values
~300
after
Conclusion
Peak
(ml·kg
)
among
reporting
decrease
implications
operational
readiness
safety
firefighters.
Scientific Journal of Sport and Performance,
Journal Year:
2024,
Volume and Issue:
3(2), P. 145 - 159
Published: Jan. 4, 2024
The
use
of
single
supplements
to
enhance
performance
is
widespread
among
athletes.
aim
this
study
was
increase
knowledge
about
the
combined
effects
caffeine
and
New
Zealand
blackcurrant
(NZBC)
dietary
supplements.
In
counterbalanced
alternating
treatment
single-case
design,
two
participants
each
underwent
four
phases
sessions
in
a
double-blind,
randomized
order.
After
3-week
pre-test
phase,
supplement
combinations
placebo/placebo,
caffeine/placebo
(5
mg/kg),
NZBC/placebo
(600
mg),
caffeine/NZBC
mg/kg
+
600
mg)
were
taken
weekly
tests
conducted
examine
their
on
relative
power
(W/kg)
during
20-minute
time
trial
bicycle.
Data
analyzed
descriptively
using
Tau-U
calculator
from
Single
Case
Research.
ergogenic
effect
confirmed
both
participants,
with
increases
3.3%
6.5%,
while
positive
NZBC
only
seen
one
participant
(13.4%).
combination
again
increased
(2.2%
19.2%),
but
data
showed
near
additive
participant.
did
not
show
consistent
improvement
intake
NZBC.
Further
studies
are
required
confirm
or
refute
evidence
synergistic
these
Journal of Exercise Science & Fitness,
Journal Year:
2024,
Volume and Issue:
22(4), P. 350 - 358
Published: June 19, 2024
The
aims
of
this
study
were
to
examine
the
effect
SARS-CoV-2
infection
on
cardiorespiratory
fitness
(CRF)
and
time-trial
performance
in
vaccinated
well-trained
young
kayak
athletes.
This
is
a
longitudinal
observational
study.
Sixteen
(7
male,
9
female)
kayakers
underwent
body
composition
assessment,
maximal
graded
exercise
test,
1000-m
tests
21.9
±
1.7
days
before
66.0
2.2
after
infection.
perception
training
load
was
quantified
with
Borg's
CR-10
scale
return
sport
period.
There
significant
decreases
peak
oxygen
uptake
(-9.7%;
size
[ES]
=1.38),
pulse
(-5.7%;
ES
=0.96),
heart
rate
(-1.9%;
=0.61).
Peak
minute
ventilation,
ventilation/carbon
dioxide
production
slope
unchanged
compared
pre-infection
values.
In
entire
1000-m,
impaired
tendencies
found
completion
time,
mean
power,
speed
(-2.4
1.2%;
small
ESs
=-0.40
0.47)
as
well
changes
stroke
length
(-4.5
3.7%;
=-0.60
0.73).
decreased
CRF
even
two
months
regular
The
use
of
isolated
supplements
to
enhance
performance
is
widespread
among
athletes.
aim
this
study
was
increase
knowledge
about
the
combined
effects
caffeine
and
New
Zealand
blackcurrant
(NZBC)
dietary
supplements.
In
study,
two
subjects
each
underwent
four
phases
sessions
in
a
double-blind
randomized
alternating
treatment
single-case
design.
After
3-week
pre-test
phase,
supplement
combinations
placebo/placebo,
caffeine/placebo
(5
mg/kg),
NZBC/placebo
(600
mg),
caffeine/NZBC
mg/kg
+
600
mg)
were
taken
weekly
tests
conducted
examine
their
on
relative
power
(W/kg)
during
20-minute
time
trial
bicycle.
Data
analyzed
descriptively
using
Tau-U
calculator
from
Single
Case
Research.
ergogenic
effect
confirmed
both
subjects,
with
increases
3.3%
6.5%,
while
positive
NZBC
only
seen
one
subject
(13.4%).
combination
again
increased
(2.2%
19.2%),
but
data
showed
an
additive
subject.
Further
studies
are
required
confirm
or
refute
evidence
synergistic
these
