Home > Journals > The Journal of Sports Medicine and Physical Fitness > Past Issues > The Journal of Sports Medicine and Physical Fitness 2003 September;43(3) > The Journal of Sports Medicine and Physical Fitness 2003 September;43(3):274-8

CURRENT ISSUE
 

ARTICLE TOOLS

Reprints

THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

A Journal on Applied Physiology, Biomechanics, Preventive Medicine,
Sports Medicine and Traumatology, Sports Psychology


Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111


eTOC

 

Original articles  EXERCISE PHYSIOLOGY AND BIOMECHANICS


The Journal of Sports Medicine and Physical Fitness 2003 September;43(3):274-8

language: English

Kinematic changes at intensities proximal to onset of lactate accumulation

Shim J., Acevedo E. O., Kraemer R. R., Haltom R. W., Tryniecki J. L.

Depart­ment of ­Health Human Per­for­mance, and Rec­re­a­tion, ­Waco, ­Texas Baylor University, Waco, TX, USA


PDF  


Aim. The pur­pose of ­this ­study was to ­examine ­changes in ­selected kin­e­matic var­i­ables at 3 run­ning inten­sities prox­imal to the ­onset of ­blood lac­tate accu­mu­la­tion (­OBLA; 4 mM of ­blood lac­tate). It was hypoth­e­sized ­that ­greater ­changes in ­lower ­body ­mechanics ­would ­occur ­when run­ning ­faster ­than ­normal ­race ­pace com­pared to ­when run­ning ­slower ­than ­race ­pace.
­Methods. ­Nine com­pet­i­tive ­male dis­tance run­ners ran at ­3 run­ning inten­sities (RI): 1) ­each ­runner’s V.O2 at 10% ­below the V.O2 at ­OBLA, 2) V.O2 at ­OBLA, and 3) V.O2 at 10% ­above the V.O2 at ­OBLA. ­Selected kin­e­matic and phys­io­log­ical var­i­ables ­were meas­ured at ­each RI.
­Results. V.O2 at RI 1, 2 and 3 was ­highly cor­re­lated ­with run­ning ­speed (r=0.93). The ­blood lac­tate (BL) ­showed a non­linear ­increase ­from RI 1 (2.9±0.8 mM) to 2 (4.1±0.9 mM) to 3 (6.7±1.8 mM). The ver­tical oscil­la­tion of ­center of ­gravity (­VOCOG), ­stride fre­quency (SF), ­range of ­motion (ROM) of ­trunk ­angle, and max­imal ­knee ­flexion ­during ­flight ­phase (­MKFF) ­changed non­lin­e­arly as did the BL. Sig­nif­i­cant rela­tion­ships ­between BL and ­VOCOG (r=0.44) and ­between BL and SF (r=0.51) ­were ­found (ps<0.05).
Con­clu­sion. The find­ings ­show a pos­sibility ­that ­lower ­body run­ning ­mechanics ­have a rela­tion­ship ­with BL.

top of page

Publication History

Cite this article as

Corresponding author e-mail