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Interval training program optimization in highly trained endurance cyclists
journal contributionposted on 2023-05-16, 19:53 authored by Laursen, PB, Shing, CM, Peake, JM, Coombes, JS, Jenkins, DG
Purpose: The purpose of this study was to examine the influence of three different high-intensity interval training (HIT) regimens on endurance performance in highly trained endurance athletes. Methods: Before, and after 2 and 4 wk of training, 38 cyclists and triathletes (mean Â± SD; age = 25 Â± 6 yr; mass = 75 Â± 7 kg; VÌ‡O 2peak = 64.5 Â± 5.2 mL.kg -1 Â·min -1 ) performed: I) a progressive cycle test to measure peak oxygen consumption (VÌ‡O 2peak ) and peak aerobic power output (PPO), 2) a time to exhaustion test (T max ) at their VÌ‡O 2peak power output (P max ), as well as 3) a 40-km time-trial (TT 40 ). Subjects were matched and assigned to one of four training groups (G 1 , N = 8, 8 Ã— 60% T max at P max , 1:2 work:recovery ratio; G 2 , N = 9, 8 Ã— 60% T max at P max , recovery at 65% HR max ; G 3 , N = 10, 12 Ã— 30 s at 175% PPO, 4.5-min recovery; G CON , N = 11). In addition to G 1 , G 2 , and G 3 performing HIT twice per week, all athletes maintained their regular low-intensity training throughout the experimental period. Results: All HIT groups improved TT 40 performance (+4.4 to +5.8%) and PPO (+3.0 to +6.2%) significantly more than G CON (-0.9 to + 1.1%; P < 0.05). Furthermore, G 1 (+5.4%) and G 2 (+8.1%) improved their VÌ‡O 2peak significantly more than G CON (+1.0%; P < 0.05). Conclusion: The present study has shown that when HIT incorporates P max as the interval intensity and 60% of T max as the interval duration, already highly trained cyclists can significantly improve their 40-km time trial performance. Moreover, the present data confirm prior research, in that repeated supramaximal HIT can significantly improve 40-km time trial performance.
Publication titleMedicine and Sciences in Sports and Exericse
Department/SchoolSchool of Health Sciences
PublisherLippincott Williams & Wilkins
Place of publicationUnited States