Affiliations: Coaching Education Department, School of Physical Education and Sports, Ege University, Bornova, Izmir, Turkey
Correspondence:
[*]
Corresponding author: Muzaffer Colakoglu, Coaching Education Department, School of Physical Education and Sports, Ege University, 35050 Bornova, Izmir, Turkey. Tel.: +90 232 342 5714/15; Fax: +90 232 339 9000; E-mail:muzaffer.colakoglu@ege.edu.tr
Abstract: BACKGROUND: Although several studies have focused on maximal
O2 uptake (V˙
O2max) measured by a verification phase following the
determination of peak O2 uptake (V˙
O2peak) by a graded exercise
test, an explanation for the underlying mechanisms of the difference between
V˙
O2peak and confirmed V˙
O2max is scant. OBJECTIVE: To explore the hypothesis that when the
difference between V˙
O2peak and V˙
O2max
(ΔV˙
O2)
increases, the gap between peak stroke volume (SVpeak) and SV level
corresponding to V˙
O2peak velocities (Δ SV) grows. METHODS: Nine moderately to well-trained male athletes
(V˙
O2max: 60.2 ± 7 mL ⋅ min-1 ⋅ kg-1)
volunteered to take part in the study. Following familiarization session,
volunteers were asked to perform submaximal and maximal graded exercise
tests. Then, constant-loading SVpeak tests (using wattages in
a range from 40-100% of V˙
O2peak) and verification phase (using
wattages corresponding with 100-110% of V˙
O2peak) were conducted in a
climatic chamber. RESULTS: The ΔV˙
O2 was well correlated with
Δ SV (Pearson r= 0.89; p≤ 0.001). The mean SVpeak of
participants corresponded to 60.3 ± 18% of V˙
O2peak.
V˙
O2max was significantly greater (11.2%) than V˙
O2peak (60.2 ± 7 vs.
54.2 ± 8.1 mL ⋅ min-1 ⋅ kg-1) (p ≤ 0.01). CONCLUSIONS: V˙
O2peak and V˙
O2max differences may be
related to the gap between SVpeak and SV at V˙
O2peak.
