title: Post-activation potentiation effects on vertical and horizontal explosive performances of young handball and basketball athletes.
abstract: BACKGROUND
  The present study was designed to compare the effects of post-activation potentiation (PAP) protocols on explosive activities of trained young athletes.
  
  
  METHODS
  Twenty-six young team sport players (handball, N.=12; basketball, N.=14; mean age 15.4±0.3 years; mean height 169.5±6.4 cm; mean weight 61.4±7.6 kg; Tanner stages 3 and 4) performed seven countermovement jumps (CMJ) and seven 20-meter sprints at baseline, ~15s, 4, 8, 16, 24 and 30 minutes after three different stimulus conditions: 3 sets of 10 repetitions of double-leg drop jumps (PAPD), 3 sets of 5 repetitions of alternate-one-leg drop jumps (PAPO), or walking control (CON).
  
  
  RESULTS
  A significant reduction in explosive performance was observed at each time-point in both groups. Negative PAP effect occurred on the 20-meter sprint in PAPO at 16 (P=0.008), 24 (P=0.001) and 30 minutes (P<0.001) and in PAPD at 30 minutes (P=0.002) compared to CON.
  
  
  CONCLUSIONS
  This study indicated the negative effect of PAP on subsequent explosive performance in young team sport players. These findings represent a practical suggestion for the prudent use of PAP protocols aimed at enhancing vertical and horizontal explosive performances of young athletes.
authors.affiliation: Zinman College of Physical Education and Sport Sciences, Wingate Institute, Netanya, Israel - antdelloiacono@virgilio.it.
authors.forename: Antonio
authors.initials: A
authors.lastname: Dello Iacono
authors.affiliation: eCampus University, Novedrate, Italy.|Tunisian Research Laboratory for Sport Performance Optimization, National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia.
authors.forename: Johnny
authors.initials: J
authors.lastname: Padulo
authors.affiliation: Zinman College of Physical Education and Sport Sciences, Wingate Institute, Netanya, Israel.|Child Health and Sports Center, Department of Pediatrics, Meir Medical Center, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
authors.forename: Alon
authors.initials: A
authors.lastname: Eliakim
authors.affiliation: Zinman College of Physical Education and Sport Sciences, Wingate Institute, Netanya, Israel.
authors.forename: Roni
authors.initials: R
authors.lastname: Gottlieb
authors.affiliation: Zinman College of Physical Education and Sport Sciences, Wingate Institute, Netanya, Israel.
authors.forename: Rafi
authors.initials: R
authors.lastname: Bareli
authors.affiliation: Zinman College of Physical Education and Sport Sciences, Wingate Institute, Netanya, Israel.
authors.forename: Yoav
authors.initials: Y
authors.lastname: Meckel
mesh_terms: D000293:Adolescent; D056352:Athletes; D054874:Athletic Performance / Q000502:physiology*; D001490:Basketball / Q000502:physiology*; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology*; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D053580:Muscle Strength / Q000502:physiology; D010806:Physical Education and Training; D010807:Physical Endurance / Q000502:physiology*; D059385:Plyometric Exercise