european college of sport science

Saturday, June 27th, 2009
Results: The cycle duration decreased in a similar manner with speed during running on all the tested surface conditions. The burst
duration of the knee extensor m. vastus lateralis shows the same trend as the change in cycle duration with speed. The same increasing
trend in mean EMG activation level with speed is seen on all running surfaces. Surface related differences in cycle duration, burst duration
and EMG amplitude were present.
Discussion: The clear trends in cycle duration and EMG during running on different surfaces with speed indicate that the neuromotor
system tend to adapt the control of locomotion with a similar basic pattern in the studied parameters. Despite the similar generic trends a
running surface like the wet moss may limit the speed range, elongate the EMG burst duration and demand a higher EMG activation
level for a given speed. This is important information in endurance and strength training design and for the acute route choices in an
orienteering race.
ACCURACY OF SHOOTING RESULTS IMITATION WITH AN OPTOELECTRONIC TRAINING SYSTEM
KOROSTYLOVA, Y., ZANEVSKYY, I.
LVIV STATE UNIVERSITY OF PHYSICAL CULTURE, LVIV, UKRAINE; CASIMIR PULASKI TECHNICAL UNIVERSITY, RADOM, POLAND
Controlling of postural and weapon stability is a distinctive feature in the sport of shooting [1]. Optoelectronic training systems provide a
shooter with data and graphical information on the aiming line cross point coordinates on a target [2]. The SCATT system indicates a
prognostic result of a real shot taking into account the period of time from triggering up to the instant when a pellet leaves a barrel and
also a lateral motion of a muzzle because the pellet having left the barrel continues moving in the same direction as the muzzle [3].
The aim of the research is to compare pellet coordinates on a target with coordinates of the SCATT system imitation trace.
The method of study includes shooting with Steyr LP-10 air pistol and 4,49 mm Finale Match pellets using simultaneous recording on the
SCATT system and shooting with the pistol held in a vice and pellets from the same box. A research hypothesis is that coordinates of the
imitation and pellet’s coordinates on a target are equal. Relative coordinates of the SCATT system point and the pellet mark on a target
were calculated to avoid systematic errors caused with non-focus of its axis and a barrel axis on a target, and a gravitational displacement
of a pellet. A statistical hypothesis is that a dispersion of the relative coordinates equals a dispersion of pellets hit coordinates shot
with the viced pistol.
A highly qualified female shooter made 10 shots from a 10 m distance. An initial speed of pellets (M±SD=162.2±0.6 mps) was measured
with a chronoscope Combro cb-625мk4. A shot moment (0.0031 s) was calculated as a time of pellet motion along a barrel (0.25
m) assuming a constant acceleration during the time. A distance between pairs of the pellet and imitated points in the relative coordinates
was 2.52±0.72 mm. A radius from a centre of 10 shots executed with the viced pistol was 1.36±0.76 mm. Normal distribution of the
two samples was accepted using Shapiro-Wilk test (p>0.1). With Fisher-Snedecor criterion, the statistical hypotheses about equal variances
was accepted (p>0.620). T-test showed a large difference in the mean distances (p