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COMPARISON OF AEROBIC CAPACITY INDICATORS OBTAINED FROM DIFFERENT GRADED EXERCISE TEST PROTOCOLS IN FEMALE RUNNERS
Lucija Kolić
; Kineziološki fakultet, Sveučilište u Zagrebu
Vesna Babić
orcid.org/0000-0001-9849-2389
; Kineziološki fakultet, Sveučilište u Zagrebu
Davor Šentija
; Kineziološki fakultet, Sveučilište u Zagrebu
Sažetak
The aim of this study was to compare different
indicators of aerobic capacity derived from two graded
treadmill exercise test protocols of different duration. Ten
female runners completed two graded treadmill tests to
exhaustion with increasing speed of : 1) 1 kmh /60 s (ST)
and 2) 1 kmh /30 s (KT). Spiroergometric parameters
were registered b and averaged to 30 s.
The second ventilatory (anaerobic) threshold (P) was
determined by the simplified method. The
maximum running speed (v : 17,1±1,4 kmh ; v :
19,4 ± 1,2 kmh ) and running speed at the P (v : 12,3
kmh ± 1,5; v : 13,8 ± 1,5 kmh ) differed significantly
between protocols (p<0.05), and were inversely related to
single stage and overall test duration. Heart rate value (FS)
at the maximum intensity was significantly lower in KT
(FS : 194,9±6,8 bpm; FS : 190,4±6,0 bpm; p=0,03)
which can be attributed to the inertia of cardiovascular
dynamics, while FS at P did not differ significantly
between protocols (FS : 178,2±8,7 bpm; FS :
175,2±10,9 bpm; p>0,05). Maximal oxygen uptake did
not differ between protocols (VO : 52,6±4,9 ml/kg,
VO : 53,9±6,2 ml/kg; p>0.05), while at the P, a small
but statistically significant difference was found (VO :
45,6±5,2 ml/kg, VO : 47,7±5,2 ml/kg; p=0,03).
Correlation analysis revealed high to very high
relationships between all test parameters (r = 0.77–0.96,
p<0.05), except for the respiratory exchange ratio (RQ) at
P and at maximum (r = 0.01-0.52, p>0.05). RQ did not
differ between tests at P (RQ : 0.98±0,04, RQ :
0,96±0,08; p>0.05) nor at maximum intensity (RQ :
1.20±0,09, RQ : 1,25±0,11; p>0.05). Lower values in
the RQ in relationship to values reported in the literature
for male runners may be explained by a relatively higher
share of energy for muscle work by oxidation of fats in
females compared to males, probably due to the influence
of gender specific hormonal status. The results of this
study indicate that test characteristics and overall test
duration should be considered when comparing results
obtained from different graded exercise test protocols.
Ključne riječi
running; aerobic capacity; anaerobic threshold; graded exercise test
Hrčak ID:
87701
URI
Datum izdavanja:
10.7.2012.
Posjeta: 3.173 *