Limits...
Biomechanical Analysis of Defensive Cutting Actions During Game Situations: Six Cases in Collegiate Soccer Competitions.

Sasaki S, Koga H, Krosshaug T, Kaneko S, Fukubayashi T - J Hum Kinet (2015)

Bottom Line: In addition, the center of mass height was expressed as a ratio of each participant's body height.This suggests that the lower center of mass at initial contact is an important factor to reduce the downwards vertical center of mass translation during defensive cutting actions, and that this is executed primarily through hip flexion.It is therefore recommended that players land with an adequately flexed hip at initial contact during one-on-one cutting actions to minimize the vertical center of mass excursion.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Health Sciences, Tokyo Ariake University of Medical and Health Sciences, Tokyo, Japan.

ABSTRACT
The strengths of interpersonal dyads formed by the attacker and defender in one-on-one situations are crucial for performance in team ball sports such as soccer. The purpose of this study was to analyze the kinematics of one-on-one defensive movements in soccer competitions, and determine the relationships between lower limb kinematics and the center of mass translation during cutting actions. Six defensive scenes in which a player was responding to an offender's dribble attack were selected for analysis. To reconstruct the three-dimensional kinematics of the players, we used a photogrammetric model-based image-matching technique. The hip and knee kinematics were calculated from the matched skeleton model. In addition, the center of mass height was expressed as a ratio of each participant's body height. The relationships between the center of mass height and the kinematics were determined by the Pearson's product-moment correlation coefficient. The normalized center of mass height at initial contact was correlated with the vertical center of mass displacement (r = 0.832, p = 0.040) and hip flexion angle at initial contact (r = -0.823, p = 0.044). This suggests that the lower center of mass at initial contact is an important factor to reduce the downwards vertical center of mass translation during defensive cutting actions, and that this is executed primarily through hip flexion. It is therefore recommended that players land with an adequately flexed hip at initial contact during one-on-one cutting actions to minimize the vertical center of mass excursion.

No MeSH data available.


Correlation between the normalized center of mass height at IC and the hip flexion angle at IC (left panel), and correlation between the center of mass height displacement between IC and COMlow and the normalized center of mass height at IC (right panel).IC = the time point of initial foot contact, COMlow = the time point of the lowest center of mass height
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4519200&req=5

f3-jhk-46-09: Correlation between the normalized center of mass height at IC and the hip flexion angle at IC (left panel), and correlation between the center of mass height displacement between IC and COMlow and the normalized center of mass height at IC (right panel).IC = the time point of initial foot contact, COMlow = the time point of the lowest center of mass height

Mentions: Table 1 shows the descriptive characteristics of the center of mass translation and the hip and knee kinematics variables during soccer competitions. Tables 2 and 3 displayed the Pearson’s product-moment correlation coefficient among the variables. The normalized center of mass height at IC was negatively correlated with the hip flexion angle at IC (r = −0.823 and p = 0.044, power .750) (Figure 3). The center of mass height displacement between IC and COMlow was positively correlated with the normalized center of mass height at IC (r = 0.832 and p = 0.040, power .768) (Figures 3), the angular displacement of the hip joint between IC and COMlow (r = 0.870 and p = 0.024, power .844), and the knee joint between IC and COMlow (r = 0.829 and p = 0.041, power .762).


Biomechanical Analysis of Defensive Cutting Actions During Game Situations: Six Cases in Collegiate Soccer Competitions.

Sasaki S, Koga H, Krosshaug T, Kaneko S, Fukubayashi T - J Hum Kinet (2015)

Correlation between the normalized center of mass height at IC and the hip flexion angle at IC (left panel), and correlation between the center of mass height displacement between IC and COMlow and the normalized center of mass height at IC (right panel).IC = the time point of initial foot contact, COMlow = the time point of the lowest center of mass height
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4519200&req=5

f3-jhk-46-09: Correlation between the normalized center of mass height at IC and the hip flexion angle at IC (left panel), and correlation between the center of mass height displacement between IC and COMlow and the normalized center of mass height at IC (right panel).IC = the time point of initial foot contact, COMlow = the time point of the lowest center of mass height
Mentions: Table 1 shows the descriptive characteristics of the center of mass translation and the hip and knee kinematics variables during soccer competitions. Tables 2 and 3 displayed the Pearson’s product-moment correlation coefficient among the variables. The normalized center of mass height at IC was negatively correlated with the hip flexion angle at IC (r = −0.823 and p = 0.044, power .750) (Figure 3). The center of mass height displacement between IC and COMlow was positively correlated with the normalized center of mass height at IC (r = 0.832 and p = 0.040, power .768) (Figures 3), the angular displacement of the hip joint between IC and COMlow (r = 0.870 and p = 0.024, power .844), and the knee joint between IC and COMlow (r = 0.829 and p = 0.041, power .762).

Bottom Line: In addition, the center of mass height was expressed as a ratio of each participant's body height.This suggests that the lower center of mass at initial contact is an important factor to reduce the downwards vertical center of mass translation during defensive cutting actions, and that this is executed primarily through hip flexion.It is therefore recommended that players land with an adequately flexed hip at initial contact during one-on-one cutting actions to minimize the vertical center of mass excursion.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Health Sciences, Tokyo Ariake University of Medical and Health Sciences, Tokyo, Japan.

ABSTRACT
The strengths of interpersonal dyads formed by the attacker and defender in one-on-one situations are crucial for performance in team ball sports such as soccer. The purpose of this study was to analyze the kinematics of one-on-one defensive movements in soccer competitions, and determine the relationships between lower limb kinematics and the center of mass translation during cutting actions. Six defensive scenes in which a player was responding to an offender's dribble attack were selected for analysis. To reconstruct the three-dimensional kinematics of the players, we used a photogrammetric model-based image-matching technique. The hip and knee kinematics were calculated from the matched skeleton model. In addition, the center of mass height was expressed as a ratio of each participant's body height. The relationships between the center of mass height and the kinematics were determined by the Pearson's product-moment correlation coefficient. The normalized center of mass height at initial contact was correlated with the vertical center of mass displacement (r = 0.832, p = 0.040) and hip flexion angle at initial contact (r = -0.823, p = 0.044). This suggests that the lower center of mass at initial contact is an important factor to reduce the downwards vertical center of mass translation during defensive cutting actions, and that this is executed primarily through hip flexion. It is therefore recommended that players land with an adequately flexed hip at initial contact during one-on-one cutting actions to minimize the vertical center of mass excursion.

No MeSH data available.