The Relationship Between Knowledge and Nutritional Intake With The Hand Muscle Strength of Karate Athletes at The Inkanas Dojo, South Sulawes

M. Rachmat Kasmad; Magfirah; Rahyuddin JS

Authors

M. Rachmat Kasmad Universitas Negeri Makassar Author
Magfirah Universitas Negeri Makassar Author
Rahyuddin JS Universitas Negeri Makassar Author

Keywords:

Nutritional Knowledge; Protein Intake; Handgrip Strength; Karate Athletes; Sport Nutrition

Abstract

Hand muscle strength is a critical determinant of performance in karate, particularly in punching execution, gripping control, and stabilization during offensive and defensive movements. From a sports science perspective, muscular strength is influenced not only by training load and neuromuscular adaptation but also by nutritional factors, including dietary adequacy and nutritional literacy. This study aimed to analyze the relationship between nutritional knowledge and macronutrient intake with hand muscle strength among karate athletes at Dojo Inkanas, South Sulawesi. A quantitative correlational design with a cross-sectional approach was employed. The sample consisted of 20 adolescent athletes selected through total sampling. Nutritional knowledge was assessed using a structured questionnaire, while dietary intake was evaluated using a three-day 24-hour food recall. Hand muscle strength was measured using a calibrated hand dynamometer. The data were analyzed using the Chi-square test with a significance level of p < 0.05. The findings indicated that most athletes had low nutritional knowledge (65%) and insufficient hand muscle strength (55%). Bivariate analysis revealed no significant association between nutritional knowledge and hand muscle strength (p = 0.957). Similarly, energy, fat, and carbohydrate intake were not significantly related to hand muscle strength (p > 0.05). However, protein intake demonstrated a significant relationship with hand muscle strength (p = 0.047). These results highlight protein adequacy as the most relevant macronutrient associated with upper-limb strength performance in adolescent karate athletes.

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