title: Physiological and technical aspects of ''6-a-side'' soccer drills.
abstract: OBJECTIVE
  The purposes of the present study were: 1) to evaluate heart rate and technical-tactical differences, if any, during ''6-a-side'' drills, played on 2 pitch dimensions (30x40 m and 50x40 m) and duration (3 min and 8 min); 2) to assess the variability of data between repeated experimental sessions; 3) to evaluate training intensities from heart rate at lactate threshold.
  
  
  METHODS
  Laboratory measurements of maximal oxygen consumptions, maximum heart rates and lactate thresholds were performed on 9 soccer players who played at Regional level. For test and retest field sessions, the exercise intensities were calculated from heart rate monitoring and match analysis (number of actions, consecutive passes, players involved in a single action) was performed.
  
  
  RESULTS
  No significant differences were found in heart rate frequency distributions between test and retest sessions. Statistically significant differences in frequency distributions of heart rate were found only between the 3 min and 8 min drills played on the 40x50 m pitch. Regarding exercise intensity, significant differences (P<0.01) were found for pitch dimension, with higher intensities shown during the 30x40 m pitch trials. When technical data were related to time units, no differences were found among experimental settings.
  
  
  CONCLUSIONS
  These data indicate that coaches could better modulate the training intensity by varying the pitch dimension, with the smaller individual playing area (30x40 m) having a large impact on the metabolic demands of exercise.
authors.affiliation: Department of Human Movement and Sport Sciences, IUSM of Rome, Rome, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Tessitore
authors.forename: R
authors.initials: R
authors.lastname: Meeusen
authors.forename: M F
authors.initials: MF
authors.lastname: Piacentini
authors.forename: S
authors.initials: S
authors.lastname: Demarie
authors.forename: L
authors.initials: L
authors.lastname: Capranica
mesh_terms: D000328:Adult; D006339:Heart Rate; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D005082:Physical Exertion / Q000502:physiology*; D012916:Soccer / Q000502:physiology*
chemical_list: D019344:Lactic Acid