High value of maximal oxygen update (VO2max) was generally associated with large stroke volume (SV) in trained subjects but severe exercise may induce VO2max attainment with a decline of SV value. Objective: To examine the effects of interval training at the power associated with SVmax (IT@pSVmax) on the patterns of SV and 2. Methods: 8 trained adolescents (age: 14.8 ± 1.0 years, height: 163.5 ± 6.2 cm, weight: 50.4 ± 8.9 kg, VO2max: 54.6 ± 7.3 mL.min-1. kg-1) performed a progressive cycle exercise to determine the power that elicited SVmax (pSVmax) and the power associated at VO2max (p VO2max), before and after 8 IT@pSVmax weeks. Results: This training session induced an increase in SVmax (95 ± 32 vs. 121 ± 33 mL.beat-1, P<0.01) without any change in maximal heart rate. Higher SVmax was associated with higher maximal cardiac output (r=0.75, P<0.05). However, no significant changes were found in VO2max and p VO2max. Hence, post-training pSVmax did not differ from the post-training p VO2max (220 ± 57 vs. 229 ± 52 watts, respectively, NS) compared to pre-training (P<0.05) Conclusion: These data suggest that IT@pSVmax elicits an increase in SVmax until VO2max, probably due to changes in cardiac contractile performance. Further improvement in VO2max would be the result of peripheral rather than central adaptations in young subjects. Volltext auch unter: https://www.researchgate.net/search.Search.html?type=publication&query=The%20cardio-respiratory%20response%20following%20a%208-week%20aerobic%20interval%20training%20program%20in%20trained%20adolescents
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