title: Knowledge of Repetition Range Does Not Affect the Maximal Force Production Strategies of Adolescent Females.
abstract: OBJECTIVE
  Contrary to adult force reserve strategies, it is not known whether adolescent females with less experience performing maximal voluntary contractions (MVC) have specific responses to a known or unknown fatigue endpoint.
  
  
  METHODS
  Using a counterbalanced random crossover design, fourteen inexperienced female adolescents completed three elbow flexor (EF) fatiguing protocols. Participants were randomly assigned to a control (informed they would perform 12 MVCs), unknown (not informed of the number of MVCs to be completed, but stopped after 12) or deception condition (instructed to complete 6 MVCs, however, after the 6th repetition performed another 6 MVCs). Before and during the interventions, EF impulse, force, and biceps brachii (BB) and triceps brachii (TB) electromyography (EMG) activity were recorded.
  
  
  RESULTS
  Participants exhibited decreases in impulse (10.9%; p<0.05), force (7.5%; p=0.001), BB (16.2%; p<0.05) and TB (12.9%; p<0.05) EMG activity between the pre-test and the first repetition of all protocols. Knowledge of endpoint, or lack of it, did not change measures with the repeated MVCs. When informed about the final repetition, force remained depressed suggesting no physiological reserve.
  
  
  CONCLUSIONS
  Adolescent females exhibited an anticipatory response to the task of performing repeated MVCs. A lack of change with knowledge of endpoint indicates that those lacking in MVC experience do not employ the same pacing strategies as in previous studies of participants with MVC experience.
authors.affiliation: School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's Newfoundland, Canada.
authors.forename: Jonathan J
authors.initials: JJ
authors.lastname: Reid
authors.forename: R M
authors.initials: RM
authors.lastname: Greene
authors.forename: Nehara
authors.initials: N
authors.lastname: Herat
authors.forename: Daniel D
authors.initials: DD
authors.lastname: Hodgson
authors.forename: Israel
authors.initials: I
authors.lastname: Halperin
authors.forename: David G
authors.initials: DG
authors.lastname: Behm