The Effects of 12 Weeks In-Water Training in Stroke Kinematics, Dry-Land Power, and Swimming Sprints Performance in Master Swimmers

Background: Master swimming is becoming increasingly popular, but research related to the training process and its effect on this population scarce. The aim of study was investigate effects 12 weeks in-water in stroke kinematics, dry-land power, sprints performance master swimmers, relationships between these variables sports population. Methods: 15 healthy physically active male swimmers (age 32.3 ± 5.1 years, height 1.81 0.04 m, body mass 77.0 6.5 kg, experience 11 4 years average volume ~2.5 km/day, 3 times a week) participated study. Previously after intervention program, entirely water-based, were tested environment assess their upper lower limbs (UL LL) strength through power measurements, namely countermovement jumps (CMJ), seated kg medicine ball throwing (MBT) maximal isometric with handgrip (HG). In-water 50 m front crawl test also completed. Swimming at 15, 25, (T15, T25, T50) determined, associated kinematics. During program period, comprised three sessions per week (7.5 0.9 km microcycle), low- high-intensity aerobic anaerobic series technical drills. Results: T25 significantly decreased (18.82 2.92 vs. 18.60 2.87 sec, p = 0.02), same observed case T50 (40.36 7.54 38.32 6.41 0.00). Changes rate (SR), length (SL) index (SI) not observed, contrarily 25 where SL SI increased. MBT HG improved, CMJ, improvements T15, mostly kinematic proficiency improvement. Conclusions: enhance time swimming. are improved that most influence when compared SR variables. Centering only tasks seem be relevant interest since age influences