The consequences of caffeinated chewing gum on dash swimming efficiency and upper-body energy: a randomized crossover examine | BMC Vitamin

Background

This examine aimed to judge the results of caffeinated chewing gum on 50-m freestyle swimming efficiency, in addition to on pre- and post-performance measures of maximal isometric shoulder flexion energy and blood lactate focus in male swimmers.

Methods

In a randomized, double-blind, crossover, placebo-controlled design, ten male swimmers (imply ± SD; age 27 ± 10 years; physique mass 82.7 ± 13.6 kg; peak 179 ± 6 cm; physique fats 11.9 ± 7.3%) accomplished two experimental trials. Participants ingested both caffeinated (300 mg) or placebo chewing gum adopted by a 10-minute absorption interval. Swimmers then carried out a 50-m freestyle time trial in a pool. Maximal isometric shoulder flexion energy and blood lactate concentrations have been measured earlier than and after the swim.

Results

Compared to the placebo, caffeinated gum diminished the 50-m swim time from 28.70 ± 1.21 to twenty-eight.18 ± 1.31 s, leading to a efficiency enchancment of -1.83% [95% confidence interval: -2.69%, -0.63%] (p = 0.013). However, there have been no vital results of caffeine supplementation on maximal energy (p = 0.261) or blood lactate ranges (p = 0.586), nor vital interactions between supplementation and time.

Conclusion

Ingesting caffeinated chewing gum simply 10 min previous to train led to a big enhancement (-1.83%) in 50-m freestyle swimming efficiency time, impartial of modifications in maximal shoulder flexion energy or blood lactate concentrations. This means that speedy caffeine absorption can profit dash swimming efficiency with out affecting muscle energy or lactate metabolism in male swimmers.

Clinical trial quantity

Brazilian Clinical Trial Registry (https://ensaiosclinicos.gov.br: RBR-3GX2H7F). Registered on October 1, 2025, retrospectively registered.