The current work investigates the impact of nutrients intake on athletic performance through the Fibonacci wavelet approach. The Athlete’s performance is influenced by the nutrients intake in his diet. The governing nutrient, metabolism, and performance equations are transformed into algebraic equations. The Fibonacci wavelet method is used to solve achieved nonlinear coupled equations. The nature of the Athlete’s performance is analyzed graphically for a scale of various values of physical parameters. The Fibonacci integral operational matrix is used to solve the achieved nonlinear equation and it has been used for the first time to solve problem related to sports engineering.