Lower fatigue and faster recovery of ultra-short race-pace swimming training sessions Cuenca Fernández, Francisco Boullosa, Daniel Ruiz Navarro, Jesús Juan Gay Párraga, Ana Morales Ortiz, Esther López Contreras, Gracia Arellano Colomina, Raúl High-intensity interval training (hiit) Ultra-short race-pace training (USRPT) is a high-intensity training modality used in swimming for the development of the specific race-technique. However, there is little information about the fatigue associated to this modality. In a crossover design, acute responses of two volume-equated sessions (1000-m) were compared on 14 national swimmers: i) USRPT: 20×50-m; ii) RPT: 10×100-m. Both protocols followed an equivalent work recovery ratio (1:1) based on individual 200-m race-pace. The swimming times and the arm-strokes count were monitored on each set and compared by mixed-models. Blood lactate [La-] and countermovement jump-height (CMJ) were compared within and between conditions 2 and 5 min after the protocols. The last bouts in RPT were 1.5–3% slower than the target pace, entailing an arm-strokes increase value of ~0.22 for every second increase in swimming time. USRPT produced lower [La-] ([Mean ± standard deviation], 2 min: 8.2±2.4 [p = 0.021]; 5 min: 6.9±2.8 mM/L [p = 0.008]), than RPT (2 min: 10.9±2.3; 5 min: 9.9±2.4 mM/L). CMJ was lowered at min 2 after RPT (-11.09%) and USRPT (-5.89%), but returned to the baseline in USRPT at min 5 of recovery (4.07%). In conclusion, lower fatigue and better recovery were achieved during USRPT compared to traditional high-volume set. 2021-06-01T10:17:27Z 2021-06-01T10:17:27Z 2021-05-25 info:eu-repo/semantics/article Cuenca-Fernández, F., Boullosa, D., Ruiz-Navarro, J. J., Gay, A., Morales-Ortíz, E., López-Contreras, G., & Arellano, R. (2021). Lower fatigue and faster recovery of ultra-short race pace swimming training sessions. Research in Sports Medicine, 1-14. http://hdl.handle.net/10481/68968 10.1080/15438627.2021.1929227 eng http://creativecommons.org/licenses/by-nd/3.0/es/ info:eu-repo/semantics/openAccess Atribución-SinDerivadas 3.0 España Taylor & Francis