Progressive Dehydration Causes a Progressive Decline in Basketball Skill Performance


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Abstract

Purpose:To determine the effect of 1, 2, 3, and 4% dehydration (DEH) versus euhydration (EUH) on basketball performance in adult male players.Methods:Seventeen 17- to 28-yr-old male basketball players completed 3 h of interval treadmill walking (40°C and 20% relative humidity) with or without fluid replacement. Subjects completed six trials in random order: 1) EUH with a carbohydrate-electrolyte solution (CES), 2) EUH control (flavored water with 0% carbohydrate and 18 mM sodium), 3) 1% DEH, 4) 2% DEH, 5) 3% DEH, and 6) 4% DEH. After a 70-min recovery period, subjects performed a sequence of continuous basketball drills designed to simulate a fast-paced game. Measures of overall skill performance during the 80-min game included 1) total time to complete basketball-specific movement drills (sprinting, defensive slides, sprinting-defensive slides combination, and repetitive jumping drills) and 2) total number of shots (foul-line and baseline jump shots, layups, three-point, 15-ft, free throws) made per game.Results:Performance during all timed and shooting drills declined progressively as % DEH increased. Total time to complete basketball-specific movement drills was slower (1%: + 7 ± 6; 2%: + 20 ± 5 (P < 0.05); 3%: + 26 ± 7 (P < 0.005); 4%: + 57 ± 9 (P < 0.0001) s), and fewer shots were made during DEH versus EUH control (1%: −5 ± 1; 2%: −6 ± 2 (P < 0.05); 3%: −8 ± 2 (P < 0.005); 4%: −10 ± 1 (P < 0.0001) shots made). There were no significant differences in performance between CES and EUH control.Conclusion:Basketball players experienced a progressive deterioration in performance as DEH progressed from 1 to 4%. The threshold, or % DEH at which the performance decrement reached statistical significance, was 2% for combined timed and shooting drills.

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