Macro partitioning
Higher protein intake is significantly associated with greater hand muscle strength in adolescent karate athletes, whereas energy, fat, and carbohydrate intake are not.
For adolescent karate athletes, ensuring adequate protein intake is more critical for hand strength than simply eating enough total calories or focusing on carbs/fat. While knowing nutrition is good, it doesn't replace the need for specific nutrient intake and training. Focus on distributing protein intake throughout the day to support muscle protein synthesis alongside training.
However, protein intake demonstrated a significant relationship with hand muscle strength (p = 0.047)... Similarly, energy, fat, and carbohydrate intake were not significantly related to hand muscle strength (p > 0.05).
Why this rating
The study is a small cross-sectional observational study (n=20) using Chi-square tests on categorical data, limiting causal inference.
Source
The Relationship Between Knowledge and Nutritional Intake With The Hand Muscle Strength of Karate Athletes at The Inkanas Dojo, South Sulawes
M. Rachmat Kasmad et al. · COMPETITOR Jurnal Pendidikan Kepelatihan Olahraga · 2026
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