 |
Principal components of the 180°-turn with the ball kinematics in youth soccer players
1 : Department of Biomedical Sciences for Health - State University of Milan
(Unimi)
-
Website
via Mangiagalli 31, 20133, Milano (Italy) -
Italy
| Subject : | : | Poster |
| Comment | : | We would like to thank you for your positive response to our paper and for giving us the opportunity to further improve our abstract. Please find enclosed a revised version of the abstract as well as a point-by-point reply to the reviewer's comments. We trust that the present version will be suitable for acceptance at the ISBS conference. Sincerely, Matteo Zago Reviewer 1: “I appreciate the use of PCA to extract important features of a complex dataset. However, the execution of the analysis could be improved by looking at continuous kinematic waveforms, as opposed to discrete ROM values.” We agree with the reviewer and we are planning to include the kinematics waveforms analysis in a shortcoming development of the present work. “Otherwise the discussion is of a high standard, and it is clear they have spent time interpreting their results. Appropriate references to PCA methods and soccer analysis throughout introduction and discussion.” We would like to thank the reviewer for his/fìher appreciation and encouragement to carry on along this way. “Easy to follow the introduction and methodology, results could be better organised. I feel that some of the discussion should actually be in the results section. “ The Results and Discussion sections were reorganized. “I would change the topic from 'Innovative methods' to 'Teaching & coaching biomechanics', as the method is well established, and the interesting aspect of this paper is the coaching implications.” Topic was changed accordingly. Reviewer 2: “Original approach to a complex task and nice discussion to bridge the gap between a "technical" method and the practical consequences of your results. I have two comments relative to your methods. First, you should explain that your joints are not three-dimensional, since you modelled the upper and lower limbs with 2D segments. In general, a short description of the measurement protocol is beneficial, especially at conferences where it is not easy to download referenced papers.” Indeed, knee and elbow were modelled as 1-degree-of-freedom joints. This was better explained in the text, and measurement protocol details were added. “Second, given the role you /and your data) attributed to anthropometry, I was left wondering why you did normalize with height CoM vertical range and not other CoM related variables.” We choose to avoid normalization of CoM displacements in horizontal directions (x and z) for two reasons: 1) since the task was externally imposed by spatial constraints, the task definition itself constitutes a standardization of results; 2) moreover, the ability to bring out the technique effectively is dependent on the variability of absolute horizontal displacements. “Twice in the manuscript you used the word "each" followed by a plural form (variables, trials), pleas change to singular form (each trial, each variable).” The text was corrected accordingly. |
| Topics | : | Poster session 4 |
| Keywords | : | soccer technique ; change of direction ; dribbling ; sport kinematics ; principal component analysis |
| PDF version | : |  PDF version |
