Biomechanical and physiological effects of two-week sprint interval training in collegiate swimmers

Introduction. - Interval training with high-intensity loads is recommended for skeletal muscle adaptation in competitive athletes. According to the results of some studies, training intensity, not volume, has greater impact on swimming performance. The aim of present study was to evaluate the effect of 2-week high-intensity, low-volume swimming training with individual passive recovery on both aerobic and anaerobic performance in collegiate swimmers. Summary of acts and results. - Seven collegiate male swimmers participated in six swimming training sessions within two weeks. Each workout contained repeated high-intensity task. Before and after the training period, kinematics variables were assessed in 25-m maximal swim test and 8 x 25-m swim test with 5-second rest. Aerobic and anaerobic capacities were determined in the laboratory tests, blood markers were also specified. Six training sessions improved swimming velocity in maximal 25-m swim test, as well as power outputs in Wingate test. However, no significant improvement was observed in the kinematics variables of eight 25-m repetitions. Aerobic capacities of the swimmers did not change essentially. Conclusion. - Two weeks of sprint interval training improved power abilities and speed in short distance swimming test. However, the short recovery intervals in training protocol may not positively affect the aerobic capacity. (C) 2017 Elsevier Masson SAS. All rights reserved.