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ULTIMO FASCICOLOTHE 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 1,111

Periodicità: Mensile

ISSN 0022-4707

Online ISSN 1827-1928

 

The Journal of Sports Medicine and Physical Fitness 1999 Marzo;39(1):16-9

 ORIGINAL ARTICLES

A com­bined meth­od for esti­mat­ing ven­til­a­to­ry thresh­old

Kara M. 1, Gokbel H. 2, Bediz C. S. 2

1 Depart­ment of Phys­iol­o­gy, Facul­ty of Med­i­cine, Yüzüncü Yıl Uni­ver­sity, Van, Tur­key;
2 Depart­ment of Phys­iol­o­gy, Facul­ty of Med­i­cine, Selçuk Uni­ver­sity, Kon­ya, Tur­key

Back­ground. The ­aims of ­this ­study ­were to com­pare two new meth­ods (­Dmax and ­CUSUM) for deter­mi­na­tion of the ven­til­a­to­ry thresh­old and to exam­ine the con­se­quenc­es of esti­ma­tion by appli­ca­tion of ­these meth­ods in com­bi­na­tion.
Meth­ods. Experi­men­tal ­design: a com­par­a­tive ­design was ­used.
Set­ting: the ­study was per­formed in the Exer­cise Phys­iol­o­gy Labor­a­to­ry in the Facul­ty of Med­i­cine, ­Selçuk Uni­ver­sity. Par­tic­i­pants: thir­ty-two ­untrained ­males (20.6±1.2 yrs) per­formed an incre­men­tal exer­cise ­test on a ­cycle ergom­e­ter. Inter­ven­tions: ­there is no inter­ven­tion. Meas­ures: ven­til­a­to­ry and gas ­exchange var­i­ables ­were meas­ured ­breath-by-­breath. The ventilatory thresholds ­were detect­ed by con­ven­tion­al lin­e­ar regres­sion, ­CUSUM, ­Dmax and com­bined ­CUSUM-­Dmax meth­ods.
­Results. The ventilatory thresholds deter­mined by ­Dmax meth­od ­gave the high­est r-val­ues com­pared to the cri­ter­ion meth­od. ­There was no sta­tis­ti­cal dif­fer­ence ­between thresh­olds deter­mined by all meth­ods or by the ­same meth­od ­using dif­fer­ent var­i­ables. Ven­til­a­to­ry thresh­olds ­could not be deter­mined by the con­ven­tion­al lin­e­ar regres­sion meth­od in ­three sub­jects but ­were deter­mined in all sub­jects by the oth­er ­three meth­ods.
Con­clu­sions. ­Although all meth­ods pre­sent­ed in ­this ­study can be ­used in the deter­mi­na­tion of ven­til­a­to­ry thresh­old, the ­Dmax method was ­found to be the ­most val­id one. ­When ­using the ­CUSUM meth­od, com­bin­ing it ­with the ­Dmax meth­od increas­es the valid­ity of the meas­ure­ment.

lingua: Inglese


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