Home > Riviste > The Journal of Sports Medicine and Physical Fitness > Fascicoli precedenti > The Journal of Sports Medicine and Physical Fitness 2001 September;41(3) > The Journal of Sports Medicine and Physical Fitness 2001 September;41(3):291-9

ULTIMO FASCICOLO
 

ARTICLE TOOLS

Estratti

THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

Rivista di Medicina, Traumatologia e Psicologia dello Sport


Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,215


eTOC

 

Original articles  


The Journal of Sports Medicine and Physical Fitness 2001 September;41(3):291-9

Copyright © 2002 EDIZIONI MINERVA MEDICA

lingua: Inglese

Age related neural adaptation following short term resistance training in women

Bemben M. G., Murphy R. E.

From the Neuromuscular Research Laboratory Department of Health and Sport Sciences University of Oklahoma, Norman, USA


PDF  


Back­ground. ­This ­study exam­ined the influ­ence of age on neu­ral facil­i­ta­tion and neu­ral ­cross-edu­ca­tion fol­low­ing ­short ­term uni­lat­er­al dynam­ic resis­tance train­ing ­with the hypoth­e­sis ­that old­er wom­en may ­have a dimin­ished abil­ity for adap­ta­tion.
Meth­ods. Experi­men­tal ­design: ­this was a pros­pec­tive, repeat­ed meas­ures ­design. The non-dom­i­nant ­left arm ­served as a con­trol ­limb and fol­low-up test­ing was per­formed two ­weeks ­after pretest­ing. Set­ting: test­ing was con­duct­ed in the Neu­ro­mus­cu­lar ­Research Labor­a­to­ry at the Uni­ver­sity of Okla­ho­ma. ­Patients: 20 ­females (n=10, ­young (YF) 20.8±0.1 yrs; n=10, old­er (OF) 58.1±0.14) ­were ­assessed. Inter­ven­tions: 14 ­days of train­ing of the ­right ­elbow flex­ors ­only. On ­each day, sub­jects per­formed ­four ­sets of ten rep­e­ti­tions ­using 70% of max­i­mal ­strength of the ­biceps bra­chii. Meas­ures: the fol­low­ing var­i­ables in ­both ­right and ­left ­elbow flex­or mus­cle ­groups ­were eval­u­at­ed; iso­met­ric ­strength (IMS), effi­cien­cy of electri­cal activ­ity (EEA) and esti­mat­ed ­upper arm ­cross-sec­tion­al ­area (CSA).
­Results. ­There ­were sig­nif­i­cant increas­es (p≤0.01) in IMS of ­both the ­right (28%) and ­left (12-15%) mus­cle ­groups for ­both age ­groups. ­Strength improve­ments ­were ­explained by neu­ral adap­ta­tion ­since ­there ­were no chang­es in ­upper arm CSA but con­sis­tent decreas­es in EEA (12-16%). ­While OF had con­sis­tent­ly low­er val­ues for all var­i­ables, ­there ­were no sig­nif­i­cant age ­effects.
Con­clu­sions. ­Short ­term uni­lat­er­al dynam­ic resis­tance train­ing is a suf­fi­cient stim­u­lus to ­induce sig­nif­i­cant ­strength increas­es in ­both ­trained and ­untrained con­tra­lat­er­al ­limbs and ­that a neu­ral mech­a­nism is respon­sible for the mus­cu­lar adap­ta­tion in ­both ­young and old­er wom­en. Impli­ca­tion ­exists for uni­lat­er­al ­stroke vic­tims, indi­vid­u­als ­with sin­gle hip or ­knee replace­ments, or sin­gle ­limb ­casts.

inizio pagina

Publication History

Per citare questo articolo

Corresponding author e-mail