Date of Completion

5-5-2012

Embargo Period

5-14-2012

Open Access

Open Access

Abstract

Context: Dehydration can have negative effects on performance and mood during intense exercise.

Objective: To examine a soccer program to determine the effectiveness of their hydration protocol during preseason training.

Design: 9-day mixed methods study of preseason training sessions (97.3±21.3 min) and scrimmages (123±14.1 min) for men’s soccer athletes on an NCAA division I soccer team with post-hoc interviews of staff members.

Setting: Outdoor soccer field and indoor training facility.

Participants:21 male NCAA division I soccer athletes (age 20±1 years, height 187.5±2 cm).

Main Outcome Measures: Hydration (BML ,Ucol­, USG, Uosmo), Mood (thirst, thermal, ESQ, POMS), Performance (distance covered, total efforts, max velocity, Tgi, HRavg, HRmax), and interview.

Results: No differences between first year players vs. returning players or training sessions vs. scrimmages for BML, Ucol, USG, or Tgi (pcol­ 5±1; post-practice USG 1.021±0.001; pre-practice Uosmo 746±159.8). Performance was lower than professional male soccer players (distance 5463.32±1088.26 m; HRavg 132.39±14.18 bpm; HRmax­ 183.6±5.99 bpm; total efforts 250±58; max velocity 25.51±1.84 km/h; average Tgi 38.11±0.35 °C). Mood did not significantly change over the preseason period (pre-practice thirst 3±0l; pre-practice thermal 3.8±0.4; pre-practice POMSTMD 5±4; pre-practice ESQ 5±1). The interview revealed major themes: education and importance placed on hydration, with minor themes: testing, during practice, and outside of practice.

Conclusions: Mild dehydration occurred during intense preseason training. Performance and mood did not decline over the preseason period. This is likely due to emphasis placed on hydration by staff.


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