The Existence of a Sticking Region in Free Weight Squats

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The aim of this study was to investigate the existence of the sticking region in two legged free weight squats. Fifteen resistance-training males (age 24 ± 4 years, body mass 82 ± 11 kg, body height 179 ± 6 cm) with 6 ± 3 years of resistance-training experience performed 6-RM in free weight squats. The last repetition was analyzed for the existence of a sticking region. Only in 10 out of 15 participants a sticking region was observed. The observed sticking region was much shorter than in the bench press. Furthermore, rectus femoris decreased the EMG activity in contrast to increased EMG activity in biceps femoris around the sticking and surrounding region. No significant change in EMG activity was found for the lateral and medial vastus muscles. It is suggested that a combination of these muscle activity changes could be one of the causes of the existence of the sticking region in free weight squats

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  • ACSM American College of Sports Medicine position stand. Progression models in resistance training for healthy adults. Med Sci Sports Exerc 2009; 41: 687-708

  • Arnason A Sigurdsson SB Gudmundsson A Holme I Engebretsen L Bahr R. Risk Factors for Injuries in Football. Am J Sports Med 2004; 32: 5-16

  • Brechue WF Abe T. The role of FFM accumulation and skeletal muscle architecture in powerlifting performance. Eur J Appl Physiol 2002; 86 327-336

  • Duffey MJ Challis JH. Fatigue effects on bar kinematics during the bench press. J Strength & Cond Res 2007; 21: 556-560

  • Elliott BC Wilson GJ Kerr GK. A biomechanical analysis of the sticking region in the bench press. Med Sci Sports Exerc 1989; 21: 450-462

  • Escamilla RF Fransisco AC Fleisig GS Barrentine SW Welch CM Kayes AV Speer KP Andrews JR. A three-dimensional biomechanical analysis of sumo and conventional style deadlifts. Med Sci Sports Exerc 2000; 32: 1265-1275

  • Goodman CA Pearce AJ Nicholes CJ Gatt BM Fairweather IH. No difference in 1RM strength and muscle activation during the barbell chest press on a stable and unstable surface. J Strength & Cond Res 2008; 22: 88-94

  • Hales ME Johnson BF Johnson JT. Kinematic analysis of the powerlifting style squat and the conventional deadlift during competition: is there a cross-over effect between lifts? J Strength & Cond Res 2009; 29: 2574-2580

  • Hermens HJ Freriks B Disselhorst-Klug C Rau G. Development of recommendations for SEMG sensors and sensor placement procedures. J Electr & Kin 2000; 10: 361-374

  • Lander JE Bates BT Swahill JA Hamill J. A comparison between free-weight and isokinetic bench pressing. Med Sci Sports Exerc 1985; 17: 344-353

  • Madsen N McLaughlin T. Kinematic factors influencing performance and injury risk in the bench press exercise. Med Sci Sports Exerc 1984; 16: 376-381

  • Marshall JL Girgis FG Zelko RR. The biceps femoris tendon and its functional significance. J Bone Joint Surg Am 1972; 54: 1444-1450

  • Newton R Murphy AJ Humphries B Wilson G Kraemer W Häkkinen K. Influence of load and stretch shortening cycle on the kinematics kinetics and muscle activation that occurs during explosive upper body movements. Eur J Appl Physiol 1997; 75: 333-342

  • Paoli A Marcolin G Petrone N. The effect of stance width on the electromyographical activity of eight superficial thigh muscles during back squat with different bar loads. J Strength & Cond Res 2009; 23: 246-250

  • Saeterbakken AH Fimland MS. Electromyographic activity and 6RM strength in bench press on stable and unstable surfaces. J Strength & Cond Res 2013a; 27: 1101-1107

  • Saeterbakken AH Fimland MS. Muscle activity of the core during bilateral unilateral seated and standing resistance exercise. Eur J Appl Physiol 2011; 112: 1671-1678

  • Saeterbakken AH Fimland MS. Muscle force output and electromyographic activity in squats with various unstable surfaces. J Strength & Cond Res 2013b; 27: 130-136

  • Sandler D. Sports Power. Champaign Ill: Human Kinetics 65-90; 2005 van den Tillaar R Ettema G. A comparison of kinematics and muscle activity between successful and unsuccessful attempts in bench press. Med Sci Sports Exerc 2009; 41: 2056-2063

  • van den Tillaar R Ettema G. A comparison of muscle activity in concentric and counter movement maximum bench press. J Human Kin 2013; 38: 63-71

  • van den Tillaar R Ettema G. The “sticking period” in bench press. J Sports Sci 2010; 28: 529-535

  • van den Tillaar R Sæterbakken A. The sticking region in three chest-press exercises with increasing degrees of freedom. J Strength & Cond Res 2012; 26: 2962-2969

  • van den Tillaar R Saeterbakken AH Ettema G. Is the occurrence of the sticking region the result of diminishing potentiation in bench press? J Sports Sci 2012; 30: 591-599

  • van den Tillaar R Sæterbakken AH. Fatigue effects upon sticking region and electromyography in a sixrepetition maximum bench press J Sports Sci 2013; 31: 1823-1830

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