Effects of high intensity continuous and intermittent training strategies used for endurance development on cardio-vascular responses

Authors

  • Gorkem Aybars BALCI Ege University, Faculty of Sport Sciences, Coaching Education Department

Abstract

Purpose of the present study was to examine the potential effects of five high intensity training (HIT) models on central and peripheral components of VO2max. We analysed O2 consumption (VO2), cardiac output (Q), stroke volume (SV), heart rate (HR) and arteriovenous O2 difference (a-vO2diff) in different regimes of HIT during loading and recovery periods. Eight well-trained male competitive cyclists take part in the study (age: 22.1±3.1 years; body mass: 66.2±8.5 kg; height: 175.4±5.2 cm; body fat: 7.2%±1.1%; O2max: 64±5.61 mL∙min-1∙kg-1). Following familiarization sessions, VO2max was determined, and then, maximal SV, HR, Q and a-vO2diff (SVmax), (HRmax), (Qmax), (a-vO2diff_max) were evaluated individually using exercise intensities corresponding to 40 to 110% of VO2max separately, by nitrous-oxide re-breathing (N2ORB) method. Thereafter, training models were performed as; HIT1:16 repetitions with power at ~110% of VO2max for 45-sec (16×45-sec, p@~110%VO2max) with 1:1 work and recovery (w/r) ratio; HIT2: 4×3-min at p@~93%VO2max with 1:1 w/r ratio; HIT3: alternating the power between VO2max (1-min) and anaerobic threshold (4-min) × 5 repetitions; HIT4: 25-min constant-load, HIT5: 6×30-sec at 7,5% body weight with 1:7 w/r ratio. All participants reached exhaustion at all tested HIT models. After the repeated-measures analyses, possible significant differences were investigated by post-hoc LSD/Wilcoxon. Tspent above 95% of VO2max was higher in HIT2 session than other exercise modalities (p<0.05). However, amongst all protocols Tspent above 90% of VO2max were not statistically different amongst exercise modalities, except HIT5 (p>0.05); Tspent at VO2max was lowest in HIT5 (p<0.05). Tspent at Qmax was higher in HIT2 and HIT3 sessions than HIT1, HIT2 and HIT5 (p<0.05). Tspent at SVmax was higher in HIT3 and HIT4 modalities than HIT1 and HIT2. Tspent at 95% of HRmax was higher in HIT2 session than other exercise modalities (p<0.05). Tspent at a-vO2diff_max was higher in HIT1 and HIT2 than HIT3, HIT4 and HIT5 (p<0.05). These results show that different exercise modalities reaching similar VO2max levels may be effective in the development of central or peripheral components associated with VO2max. It may be said that continuous HIT modalities seems to have a higher potential to improve central part of VO2max, while intermittent HIT modalities seems better for peripheral one.

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Published

2018-11-19

How to Cite

BALCI, G. A. (2018). Effects of high intensity continuous and intermittent training strategies used for endurance development on cardio-vascular responses. Journal of Science and Cycling, 7(2), 28. Retrieved from https://jsc-journal.com/index.php/JSC/article/view/410