The Journal of Knee Surgery,
Год журнала:
2023,
Номер
37(08), С. 570 - 576
Опубликована: Авг. 16, 2023
Functional
assessments
identify
biomechanical
issues
which
may
indicate
risk
for
injury
and
can
be
used
to
monitor
functional
recovery
after
an
or
surgery.
Although
the
gold
standard
assess
movements
is
marker-based
motion
capture
systems,
these
are
cost
prohibitive
have
high
participant
burden.
As
such,
this
study
was
conducted
determine
if
a
markerless
system
could
detect
preinjury
differences
in
between
those
who
did
not
experience
noncontact
lower
extremity
(NCLEI).
A
three-dimensional
comprised
area
of
3
m
×
5
2.75
used.
Participants
were
Division
I
collegiate
athletes
wearing
plain
black
long-sleeve
shirts,
pants,
running
shoes
their
choice.
bilateral
squat,
right
left
double
leg
drop
vertical
jump,
static
hop.
Measures
recorded
once
first
NCLEI
during
year
measurement.
Two-factor
analysis
variance
models
each
measure
with
factors
sex
status.
Preinjury
measures
averaged
8.4
±
3.4
minutes
time.
Out
333
participants
recruited,
209
male
124
female.
Of
those,
127
males
(61%)
92
females
(74%)
experienced
later
NCLEI.
The
most
common
initial
nonanterior
cruciate
ligament
knee
38
(41.3%)
80
(62.0%).
Females
had
decreased
flexion
valgus/varus
displacement
squat
(
Indonesian Journal of Physical Education and Sport Science,
Год журнала:
2024,
Номер
4(3), С. 271 - 282
Опубликована: Авг. 16, 2024
Study
purpose.
Swimming
experienced
significant
growth
and
achievement
in
the
late
twentieth
century
early
second
millennium,
marked
by
creation
of
advanced
records.
This
progress
is
due
to
rigorous
training,
practical
experience,
utilization
modern
scientific
techniques
applied
sciences
such
as
biomechanics.
study
aims
evaluate
several
bio-kinematic
variables,
physical
measurements,
completion
times
25-meter
freestyle
swimming.
Materials
methods.
Researchers
used
a
descriptive
approach
suit
nature
research.
The
research
sample
consisted
6
swimmers
Nineveh
Governorate
applicant
category.
There
was
digital
camera
with
speed
60
images/second.
Results.
positive
correlation
between
anthropometric
variable
(arm
length)
total
time.
researchers
attribute
this
fact
that
length
distance
one
stroke
swimming
(25)
meters
depends
primarily
on
arm
thus,
which
will
lead
covering
shortest
possible
time,
given
part
stroke.
Conclusion.
concluded
variables
studied
played
very
important
role
achieving
best
performance,
even
though
performance
generally
poor.
large
number
strokes
led
an
increase
frequency
at
expense
decreasing
average
strokes,
thereby
increasing
Health sport rehabilitation,
Год журнала:
2024,
Номер
10(3), С. 95 - 104
Опубликована: Сен. 18, 2024
Background
and
purpose
The
aim
of
this
study
is
to
incorporte
machine
learning
techniques
in
physical
education
activities
assessment
so
we
can
plan
a
training
session
cycle
based
on
predictive
analyses
using
algorithms.
Material
methods
A
dataset
represent
the
collection
tests
(as
Harvard
test,
Vertical
Horizontal
Trigger)
performance
600
m,
1000
12
min
cooper)
students
secondary
high
school,
aged
between
15
20
years
old
(mean:16,21,
SD:0,92),
during
2021-2022
scholar
year
project
predicted
results
following
cycles
2022-2023.
We
used
Microsoft
Azure
Machine
Learning
Studio
obtain
best
model
R2
score
as
an
evaluating
metric.
Results
Even
if
focus
one
metric
test
target)
with
numeric
values
article,
were
promising
compared
both
athletic
performances,
where
noticed
some
have
exceeded
expected
reach.
And
analysis
unveiled
more
important
features
impacting
for
test.
Conclusions
Incorporating
may
encourage
change
way
teach
sport
activities;
otherwise,
ML
will
give
different
overview
how
start
follow
it
up.
obtained
provides
explication
most
students’
allowing
any
planification
relay
their
importance
respectively
density
that
affects
prediction.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 12, 2024
Abstract
Sprint
performance
is
a
priority
for
coaches
and
athletes.
Several
kinematic
variables,
including
horizontal
touchdown
distance
(HTD)
inter-knee
(IKTD),
are
targeted
by
to
increase
top
sprinting
speed.
However,
the
results
of
past
research
conflicting,
potentially
due
use
experimental
inter-athlete
study
designs
where
it
not
possible
establish
cause-effect
relationships.
In
this
study,
we
used
predictive
simulation
approach
assess
relationships
between
HTD
IKTD
We
scaled
three-dimensional
musculoskeletal
model
match
anthropometry
an
international
caliber
male
sprinter,
generated
simulations
single
symmetric
step
top-speed
using
direct
collocation
optimal
control
framework.
first
our
framework
model’s
speed
with
minimal
constraints
on
kinematics
(the
simulation).
Then,
in
additional
enforced
specific
or
values
(±
2,
4
6
cm
compared
optimal).
The
achieved
11.85
m/s
simulation.
Shortening
reduced
7.3%,
while
lengthening
had
smaller
impact
speed,
1.6%
reduction.
Speed
was
insensitive
changes
tested.
indicate
there
maximize
providing
support
athletes
adjust
technique
variable.
Conversely,
do
provide
evidence
utilizing
as
key
variable
enhancement.
share
so
researchers
can
explore
effects
modifications
(
https://github.com/nicos1993/Pred_Sim_Sprinting
).
PeerJ,
Год журнала:
2023,
Номер
11, С. e16180 - e16180
Опубликована: Окт. 11, 2023
Simulation
models
have
been
applied
to
analyze
daily
living
activities
and
some
sports
movements.
However,
it
is
unknown
whether
the
current
upper
extremity
musculoskeletal
can
be
utilized
for
investigating
cue
movements
generate
corresponding
kinematic
muscle
activation
profiles.
This
study
aimed
test
feasibility
of
applying
simulation
investigate
players'
cueing
with
OpenSim.
Preliminary
forces
would
calculated
once
model
validated.A
previously
customized
validated
unimanual
six
degrees
freedom
at
scapula,
shoulder,
elbow,
wrist,
as
well
muscles
was
used
in
this
study.
Two
types
were
simulated:
(1)
back
spin
shot,
(2)
9-ball
break
shot.
Firstly,
data
joints
collected
a
3D
motion
capture
system.
Using
experimental
marker
trajectories
shot
on
10
male
players,
executed.
The
then
by
comparing
model-generated
joint
angles
against
results
using
statistical
parametric
mapping
(SPM1D)
examine
entire
angle-time
waveform
t-tests
compare
discrete
variables
(e.g.,
range
motion).
Secondly,
run
electromyographic
(EMG)
two
players
inputs.
A
model-estimated
calculation
performed
accordingly
muscles.The
OpenSim-generated
corresponded
while
outputs
shoulder
deviated
from
data.
discrepancy
could
due
insufficient
inputs
joint.
In
simulation,
preliminary
findings
suggested
that
great
primarily
contribute
forward
swing
suggests
strengthening
may
viable
strategy
improve
performance.It
feasible
cater
modeling
OpenSim
biomechanical
investigations
sports.
Model
help
better
understand
contributions
individual
when
performing
The Journal of Knee Surgery,
Год журнала:
2023,
Номер
37(08), С. 570 - 576
Опубликована: Авг. 16, 2023
Functional
assessments
identify
biomechanical
issues
which
may
indicate
risk
for
injury
and
can
be
used
to
monitor
functional
recovery
after
an
or
surgery.
Although
the
gold
standard
assess
movements
is
marker-based
motion
capture
systems,
these
are
cost
prohibitive
have
high
participant
burden.
As
such,
this
study
was
conducted
determine
if
a
markerless
system
could
detect
preinjury
differences
in
between
those
who
did
not
experience
noncontact
lower
extremity
(NCLEI).
A
three-dimensional
comprised
area
of
3
m
×
5
2.75
used.
Participants
were
Division
I
collegiate
athletes
wearing
plain
black
long-sleeve
shirts,
pants,
running
shoes
their
choice.
bilateral
squat,
right
left
double
leg
drop
vertical
jump,
static
hop.
Measures
recorded
once
first
NCLEI
during
year
measurement.
Two-factor
analysis
variance
models
each
measure
with
factors
sex
status.
Preinjury
measures
averaged
8.4
±
3.4
minutes
time.
Out
333
participants
recruited,
209
male
124
female.
Of
those,
127
males
(61%)
92
females
(74%)
experienced
later
NCLEI.
The
most
common
initial
nonanterior
cruciate
ligament
knee
38
(41.3%)
80
(62.0%).
Females
had
decreased
flexion
valgus/varus
displacement
squat
(
