![]() ![]() Video recordings were collected using one immobile camera (SONY, DSR‐PD170P, Tokyo, Japan) positioned 4–5 m away from the sideline at halfway, at an elevation of 10–12 m to allow full coverage of the court. Therefore, the aim of this investigation was to estimate the activity patterns, heart‐rate responses and plasma lactate of 38 Tunisian elite under‐19‐year‐old players during six matches. At the same time, there is no study on men's basketball that determines the position‐specific physical demands of this sport. 3 Since 1995, no study has been made in the scientific literature in which both time–motion analysis and physiological responses of players are investigated, and therefore little is known about the intensity of modern competition. ![]() Furthermore, blood or plasma lactate concentration is often used as an indicator of anaerobic lactacid energy production during competition, 1, 2 although it represents a poor indicator of muscle lactate. ![]() 1, 2 Time–motion analysis of the movement patterns also seems to be a reliable method to describe the physical demands of basketball, 1 despite some problems related to the validity and reliability of the method. There are, however, no accurate parameters to assess the intensity involved in this sport, although measurement of the continuous heart rate might provide approximate information about the aerobic energy expenditure during match play. Thus, identifying the physiological requirements of modern basketball is essential to prescribe and develop an appropriate physical training programme. Coaches believe that the changes to the rules in May 2000, which consist of shortening the attack time from 30 to 24 s and the time allowed to cross the median line from 10 to 8 s as well as subdividing the duration of play into four 10‐min quarters instead of two 20‐min halves, have probably modified the tactical and physical demands of the game. The game intensity may differ according to the playing position, being greatest in guards.īasketball is a sport that has undergone quite radical changes in the past decade. The changes to the rules of basketball have slightly increased the cardiac efforts involved during competition. Mean (SD) plasma lactate concentration was 5.49 (1.24) mmol/l, with concentrations at half time (6.05 (1.27) mmol/l) being significantly (p<0.001) higher than those at full time (4.94 (1.46) mmol/l). The mean (SD) heart rate during total time was 171 (4) beats/min, with a significant difference (p<0.01) between guards and centres. Centres spent significantly lower live time competing in high‐intensity activities than guards (14.7% (1%) v 17.1% (1.2%) p<0.01) and forwards (16.6% (0.8%) p<0.05). Players spent 8.8% (1%), 5.3% (0.8%) and 2.1% (0.3%) of live time in high “specific movements”, sprinting and jumping, respectively. ![]() Blood was sampled before the start of each match, at half time and at full time to determine lactate concentration. Heart rate was recorded continuously for all subjects. Computerised time–motion analyses were performed on 18 players of various positions. The physical demands of modern basketball were assessed by investigating 38 elite under‐19‐year‐old basketball players during competition. ![]()
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