INTRODUCTION: Variations in transverse point of measure on the vastus lateralis (VL) may significantly affect the relationship between structure and function. The purpose of this study was to compare changes in muscle architecture at 2 commonly used points of measure (VL0 and VL5). METHODS: Maximal strength (1-repetition maximum [1RM] barbell squat) and muscle architecture were assessed PRE and POST 15 weeks of periodized resistance training. VL0 was 50% of the straight line distance between the greater trochanter and lateral epicondyle of the femur. VL5 was 5cm medial to VL0. RESULTS: Increases in 1RM strength (3.7 ± 2.4 kg; P = 0.004) were observed. Changes in muscle thickness (MT) at VL5 were significantly greater than at VL0 (P = 0.006). Changes in strength correlated with changes in muscle architecture at VL0 only (MT: r = 0.561; fascicle length: r = 0.503). CONCLUSIONS: Changes in muscle architecture appear to occur in a non-homogeneous manner.
INTRODUCTION: Variations in transverse point of measure on the vastus lateralis (VL) may significantly affect the relationship between structure and function. The purpose of this study was to compare changes in muscle architecture at 2 commonly used points of measure (VL0 and VL5). METHODS: Maximal strength (1-repetition maximum [1RM] barbell squat) and muscle architecture were assessed PRE and POST 15 weeks of periodized resistance training. VL0 was 50% of the straight line distance between the greater trochanter and lateral epicondyle of the femur. VL5 was 5cm medial to VL0. RESULTS: Increases in 1RM strength (3.7 ± 2.4 kg; P = 0.004) were observed. Changes in muscle thickness (MT) at VL5 were significantly greater than at VL0 (P = 0.006). Changes in strength correlated with changes in muscle architecture at VL0 only (MT: r = 0.561; fascicle length: r = 0.503). CONCLUSIONS: Changes in muscle architecture appear to occur in a non-homogeneous manner.
Authors: Adam R Jajtner; Maren S Fragala; Jeremy R Townsend; Adam M Gonzalez; Adam J Wells; David H Fukuda; Jeffrey R Stout; Jay R Hoffman Journal: Mediators Inflamm Date: 2014-06-02 Impact factor: 4.711
Authors: Nathaniel D M Jenkins; Amelia A Miramonti; Ethan C Hill; Cory M Smith; Kristen C Cochrane-Snyman; Terry J Housh; Joel T Cramer Journal: Front Physiol Date: 2017-05-29 Impact factor: 4.566
Authors: John P Wagle; Kevin M Carroll; Aaron J Cunanan; Christopher B Taber; Alexander Wetmore; Garett E Bingham; Brad H DeWeese; Kimitake Sato; Charles A Stuart; Michael H Stone Journal: Sports (Basel) Date: 2017-11-21
Authors: Christopher Taber; Kevin Carroll; Brad DeWeese; Kimitake Sato; Charles Stuart; Mary Howell; Kenton Hall; Caleb Bazyler; Michael Stone Journal: Sports (Basel) Date: 2018-04-19
Authors: Matthew T Stratton; Grant M Tinsley; Michaela G Alesi; Garrett M Hester; Alex A Olmos; Paul R Serafini; Andrew S Modjeski; Gerald T Mangine; Kelsey King; Shelby N Savage; Austin T Webb; Trisha A VanDusseldorp Journal: Nutrients Date: 2020-04-17 Impact factor: 5.717
Authors: Gerald T Mangine; Michael J Redd; Adam M Gonzalez; Jeremy R Townsend; Adam J Wells; Adam R Jajtner; Kyle S Beyer; Carleigh H Boone; Michael B La Monica; Jeffrey R Stout; David H Fukuda; Nicholas A Ratamess; Jay R Hoffman Journal: PLoS One Date: 2018-08-30 Impact factor: 3.240
Authors: Tanner Stokes; Thomas R Tripp; Kevin Murphy; Robert W Morton; Sara Y Oikawa; Hon Lam Choi; Jessica McGrath; Chris McGlory; Maureen J MacDonald; Stuart M Phillips Journal: Physiol Rep Date: 2021-01