Shorter intervals at peak SV vs.V·O2max may yield high SV with less physiological stress
Küçük Resim Yok
Tarih
2015
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor and Francis Ltd.
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The purpose of this study was to evaluate whether greater and sustainable stroke volume (SV) responses may be obtained by exercise intensities corresponding to peak SV (SVpeak) vs. maximal O2 consumption (Formula presented.), and short vs. long intervals (SI vs. LI). Nine moderate- to well-trained male athletes competing at regional level specialists of cyclist, track and field volunteered to take part in the study (Formula presented.) : 59.7 ± 7.4 mL·min-1·kg-1). Following familiarisation sessions, (Formula presented.) was determined, and then SVpeak was evaluated using exercise intensities at 40%–100% of (Formula presented.) by nitrous-oxide rebreathing (N2ORB) method. Then each separate participant exercised wattages corresponding to individual (Formula presented.) and SVpeak during both SI (SI (Formula presented.) and SISVpeak) and LI (LI (Formula presented.) and LISVpeak) workouts on a cycle ergometer. Main results showed that both SI (Formula presented.) and SISVpeak yielded greater SV responses than LI (Formula presented.) and LISVpeak (p ? 0.05). Mean SV responses were greater in LISVpeak than in LI (Formula presented.) (p ? 0.05), but there was no statistical difference between SISVpeak and SI (Formula presented.). However, there was significantly less physiological stress based on VO2, respiratory exchange ratio, heart rate and rate of perceived exhaustion in SVpeak than in (Formula presented.) intensities (p ? 0.05). Moreover, SV responses at exercise phases increased in the early stages and remain stable until the end of SI (Formula presented.) and SISVpeak workouts (p > 0.05), while they were gradually decreasing in LI (Formula presented.) and LISVpeak sessions (p ? 0.05). In conclusion, if the aim of a training session is to improve SVpeak with less physiological stress, SISVpeak seems a better alternative than other modalities tested in the present study. © 2014 European College of Sport Science.
Açıklama
Anahtar Kelimeler
Aerobic power, maximal O2 consumption, N2ORB, nitrous-oxide, rebreathing, stroke volume
Kaynak
European Journal of Sport Science
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
15
Sayı
7
