[논문]The Effect of Types of Initial Drive-in Steps on Technical Factors in Basketball

Park, Sangheon; Yoon, Sukhoon

doi:10.5103/kjsb.2018.28.3.181

The Effect of Types of Initial Drive-in Steps on Technical Factors in Basketball 원문보기

한국운동역학회지 = Korean journal of sport biomechanics, v.28 no.3, 2018년, pp.181 - 185

Park, Sangheon (Institute of Sport Science, Korea National Sport University) , Yoon, Sukhoon (Department of Community Sport, Korea National Sport University)

Abstract ▼ AI-Helper

Objective: The purpose of this study was to investigate the effect of types of drive-in initial steps in basketball on technical factors, to provide basic information for the enhancement of basketball skill. Method: Ten men (age: $24.70{\pm}2.26years$; height: $181.00{\pm}5.72cm$; weight: $75.70{\pm}8.23kg$; career length: $10.00{\pm}3.59years$), each with a career length of over five years and no history of injury to the lower extremities within the prior six months, participated in this study. They were asked to perform four types of drive-in movements at $35{\sim}60^{\circ}$, wearing their own shoes, after running from a start line 5 m away and catching a basketball passed by an expert passer. The drive-in movements were measured by eight infrared cameras (Oqus 300, Qualisys, Sweden). Collected raw data were used to calculate total initial step time, displacement, velocity, center of mass (COM) height, and COM velocity. Results: Total initial step displacement and velocity of cross drive-ins (JC, SC) were greater than that of direct drive-ins (JD, SD; p < .05). COM velocity of cross drive-ins (JC, SC) was also greater than that of direct drive-ins (JD, SD; p < .05). Conclusion: Our results indicated that cross drive-ins, regardless of stop step type, are more effective than direct drive-ins. This is because cross drive-ins are technically bold due to less influence from walking violations and double dribble rules in basketball. However, using one-sided movement is too difficult to play in competitive game; therefore, basketball players should develop the ability to choose appropriate movement frequency.

주제어

표/그림 (8)

그림 Figure 1. Experimental view
표 Table 1. Entry speed unit: m/s
그림 Figure 2. First step types (2*2 tasks)
표 Table 2. Total initial step time unit: s
표 Table 3. Total initial step displacement unit: m
표 Table 4. Initial step velocity unit: m/s
표 Table 5. Height of COM during initial step unit: m
표 Table 6. Velocity of COM during initial step unit: m/s

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제안 방법

The purpose of the present study was to provide objective evidence for improving drive-in performance through technical factor analysis according to initial drive-in step types. The results of the study showed that cross drive-ins result in longer strides and faster initial steps compared to direct drive-ins.
The technical factors of this study—total initial step time from the moment one foot comes off the ground after supporting with both feet to the moment the initial step touches the ground (E1-E2), total initial step displacement, initial step velocity, and height and velocity of center of mass (COM)—were computed using Matlab R2009 (MathWorks, USA) (Winter, 2009).

대상 데이터

From among male students in the K University basketball club playing for Seoul, 10 men were selected as participants of the present study, all of whom had more than five years of experience in basketball, had no history of injury to the lower extremities during the prior six months, and preferentially dribbled to the right side (n: 10; age: 24.70±2.26 years; height: 181.00±5.72 cm; weight: 75.70±8.23 kg; career length:10.00±3.59 years).
Basketball is one of the most popular competitive sports in the world. Games are played by a total of 10 athletes, competing in teams of five players each on a rectangular court 28 m wide and 15 m long (International Basketball Federation [FIBA], 2012). During a basketball game, players compete for points by disrupting the opponents' defense through various applications of movements and tactics, and perform movements such as running, pausing, jumping, and landing (Yang, 2003; Lee & Jung, 2010).
To analyze movement, 51 reflective markers were attached to the participants' joint points and segment surfaces, and clusters including four markers per individual were attached to both lower and upper extremity segments.

데이터처리

One-way ANOVA with repeated measures was performed to verify the difference among kinematic variables of drive-ins based on the types of stopping movements and initial drive-in steps, and Bonferroni correction was performed for the post hoc test. The significance level was set to α = .

성능/효과

However, no differences were observed in COM height, which was identified in previous studies as a major factor in drive-in success. In conclusion, due to the unique nature of dribbling, a distinct movement in basketball, and the rules regarding walking violations and double dribbles, cross drive-ins can be more effective than direct drive-ins, even with respect to the characteristics of their simple movements. However, because no one movement can be preferred over all others to disrupt and pass by the defense in actual basketball games, effective frequency of use based on offensive players' judgement and appropriate training are necessary.
In this study, although no significant differences in total initial step time based on initial step type were found, cross drive-ins (JC, SC) generally showed about 64% longer strides and 51% greater speed in the initial step than direct drive-in (JD, SD; Tables 3-4, p < .05).
The purpose of the present study was to provide objective evidence for improving drive-in performance through technical factor analysis according to initial drive-in step types. The results of the study showed that cross drive-ins result in longer strides and faster initial steps compared to direct drive-ins. However, no differences were observed in COM height, which was identified in previous studies as a major factor in drive-in success.
However, direct drive-ins face a high chance of incurring a walking violation, as the pivot foot comes off the ground if the initial drive-in step does not cross the supporting leg prior to dribbling. Thus, the results of this study show that cross drive-ins have greater displacement than direct drive-ins because cross drive-ins allow for movements using bolder steps. Additionally, when drive-in movements are performed in basketball, the player's in-the-moment senses and arbitrary judgement determine the movement's form.

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