2026-09-24T16:28:22Zhttps://iris.unica.it/oai/requestoai:iris.unica.it:11584/2664672022-10-15T19:56:53Zcom_11584_207615com_11584_111066col_11584_265854
Precondizionamento ischemico non migliora la prestazione in atleti mezzofondisti in una prova sui 5000 metri di “self paced exercise”
SANNA, PIERPAOLO
energy cost
muscle contraction
oxygen uptake
speed
Settore M-EDF/02 - Metodi e Didattiche delle Attivita' Sportive
The ischemic preconditioning (IP) is a protective phenomenon against cell injury induced by
infarction. Furthermore, muscle IP has been found capable of improving exercise performance in
laboratory testing. This investigation aimed at verifying the hypothesis that IP improved
performance during self-paced exercise (SPE) in the field. 11 healthy male well trained runners
performed three randomly assigned 5000 m self-paced running test in a regular athletic track. One
was the reference (RT) test, while the others where performed after muscle IP (IPT) and a control
sham test (ST). Average speed was measured during each test. Moreover, mean values of heart rate
(HR), oxygen uptake (VO2), aerobic energy cost (AEC), and blood lactate (BLa) after race were
gathered. We found that none of the studied variables were affected neither by IPT nor by ST with
respect to the RT test. In detail, speed was on average 4.78±0.49, 4.84±0.85, and 4.53±0.38 m·s-1
for the RT, the ST, and the IPT test respectively. HR was 176.4±8.8, 173.8±5.4, and 175.4±5.8
bpm. VO2 was 3.5±0.69, 3.74±0.85, and 3.62±1.19 l·min-1. AEC was 1.04±0.15, 1.08±0.1, and
1.09±0.15 kcal·kg-1·km-1. Finally, BLa after races reached a level of 12.85±3.54, 11.88±4.74, and
12.82±3.6 mmol·l-1. Findings of the present investigation indicate that ischemic preconditioning is
not capable to ameliorate performance during self paced exercise in the field. These results are in
contrast to what previously found in the laboratory setting.
2014-05-08
info:eu-repo/semantics/doctoralThesis
http://hdl.handle.net/11584/266467
ita
numberofpages:46
info:eu-repo/semantics/openAccess
Università degli Studi di Cagliari
license:Non specificato