The effects of three different types of macronutrient feedings on golf performance and levels of fatigue and alertness.

No study has evaluated the effect of macronutrient feedings on golf performance. Determine the effect of feedings during simulated golf game using a randomized cross-over study design. Male participants (n = 6, USGA handicap index 8.5 ± 6.72) played three standardized nine-hole rounds, consuming 30 g of carbohydrate, 15 g + 15 g protein and carbohydrate, or a zero-calorie control. Measurements of driving, chipping, and putting distance and accuracy were taken, as well as perceived levels of fatigue and alertness. No relevant differences ( > 0.05) were seen in golf performance or alertness, but self-reported fatigue differed between conditions (  0.02), with scores of 2.5 (0.8 to 3.6) for the combination of carbohydrate and protein, 3.0 (1.5 to 4.3) for carbohydrate, and 4.0 (2.9 to 6.5) for the control, with higher levels indicating more fatigue. Macronutrient feedings led to a significantly lower level of self-reported fatigue without affecting golf performance and alertness compared to a control.