Morning Exercise: Enhancement of Afternoon Sprint-Swimming Performance

Courtney McGowan, David Pyne, Kevin Thompson, John Raglin, Ben Rattray

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


An exercise bout completed several hours prior to an event may improve competitive performance later that same day.

PURPOSE: To examine the influence of morning exercise on afternoon sprint swimming performance.

METHODS: Thirteen competitive swimmers (seven male, 19 ± 3 y; six female, 17 ± 3 y; mean ± SD) completed a morning session of 1200 m of varied intensity swimming (SwimOnly), a combination of varied intensity swimming and a resistance exercise routine (SwimDry) or no morning exercise (NoEx). Following a six hour break, swimmers completed a 100 m time-trial.

RESULTS: Time-trial performance was faster in SwimOnly (1.6% ± 0.6%, mean, ± 90% confidence limits, P < 0.01) and SwimDry (1.7% ± 0.7%, P < 0.01) compared with NoEx. Split times for the 25-50 m distance were faster in both SwimOnly (1.7% ± 1.2%, P = 0.02) and SwimDry (1.5% ± 0.8%, P = 0.01) compared to NoEx. First 50 m stroke rate was higher in SwimOnly (0.70 ± 0.21 Hz, mean ± standard deviation, P = 0.03) and SwimDry (0.69 ± 0.18 Hz, P = 0.05) compared to NoEx (0.64 ± 0.16 Hz). Before the afternoon session, core (0.2°C ± 0.1°C, mean, ± 90% confidence limits, P = 0.04), body (0.2°C ± 0.1°C, P = 0.02) and skin (0.3°C ± 0.3°C, P = 0.02) temperatures were higher in SwimDry compared to NoEx.

CONCLUSIONS: Completion of a morning swimming session alone or together with resistance exercise can substantially enhance sprint swimming performance completed later the same day.

Original languageEnglish
Pages (from-to)605-611
Number of pages7
JournalInternational Journal of Sports Physiology and Performance
Issue number5
Publication statusPublished - May 2017


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