DIFFERENCES IN SEMG BETWEEN NORMAL SQUATS AND ACCENTUATED ECCENTRIC LOADED SQUATS IN COMPETITIVE COLLEGIATE WEIGHTLIFTERS

  • Christopher MacDonald
  • Kimitake Sato
  • Christian Carter
  • Hugh Lamont
  • William Sands
  • Michael Stone
  • Michael Israetel
  • Jeremy Gentles
  • Jason Cholewa
  • John Garne
  • Michael Ramsey
  • Guy Hornsby
Keywords: training, athletes, rate of force production

Abstract

The purpose of the present work was to compare the effect of accentuated eccentric loaded (AEL) squats to normally loaded (NOR) squats on surface measured muscle activation (sEMG) in competitive weightlifters. Eight experienced, competitive weightlifters (six males, two females) completed both an AEL and NOR squat session (seven days apart), comprised of nine sets of squats, and was identical to their normal scheduled training. sEMG data from the vastus medialis (VM), vastus lateralis (VL), and biceps femoris (BF) was collected (at 1000Hz) during the entirety of the concentric (CON) phases of the AEL and NOR sessions. RMANOVAs (set x session-type) were calculated and no statistical differences were found (p > 0.05) while promising statistical effect sizes (?2 partial 0.073 to 0.273) were observed.
Published
2014-10-06
Section
Coaching and Sports Activities