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Notes:
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Makaruk, H., Starzak, M., & López, J.L. (2015). The role of a check-mark in step length adjustment in long
jump. J. Hum. Sport Exerc., 10(3), pp.756-763. The purpose of this study was to examine the effects of
utilizing a check-mark on step length adjustment in long jump. Twelve male non-skilled jumpers (age
22±0.9 years, height 1.74±0.09 m, body mass 69±9 kg) with 3 years athletics experience volunteered in
this research. Using a within-participant design, participants performed six jumps in two conditions: with
and without the check-mark. Footfall variability, and then step length adjustment during approach run (ten
final steps) were evaluated by the calculation of the standard deviation (SD) of the toe-to-board distances
for analogous step of the approach run across each subject’s attempts. The Optojump Next (Microgate,
Italy) was used in this study. Post hoc analysis showed that the footfall variability was significantly (p<0.05)
different from 6th to 1st step from the board for both the approach run conditions. In addition, pairwise
analysis indicated that the take-off accuracy was significantly (p<0.05) greater, and onset of step length
adjustment was significantly (p<0.05) earlier in the check-mark conditions than seen in non-check-mark
conditions. The low skilled athletes or those with inconsistent pattern of gait regulation should employ the
check-mark on the run-way during their training and competitions. |
