Effect of Trapezius Muscle Thickness on the One-Repetition Maximum (1RM) Strength

Abstract

Effect of Trapezius Muscle Thickness on the One-Repetition Maximum (1RM) Strength

Abstract

Purpose: The objective of this study was to examine the impact of trapezius muscle thickness measurements on bench press single repetition maximum (1RM) power output. Material and Methods: The study included 13 male bodybuilders who participated in national and international professional natural bodybuilding competitions and 13 healthy sedentary male subjects. Body composition, 1RM values and ultrasonographic measurements of trapezius muscle thickness were obtained from the participants. Results: The findings revealed that both the skin-to-superficial muscle tissue (R1, L1) and skin-to-deep fascia (R2, L2) distances were significantly lower in sedentary individuals compared to bodybuilders (p<0.001). Additionally, 1RM strength output was significantly higher in bodybuilders than in sedentary individuals. In sedentary individuals, a moderate negative correlation was observed between the distance between superficial muscle and 1RM, and a low positive correlation was observed between the distance between deep fascia and skin surface. In contrast, a low negative correlation was found in both parameters in bodybuilders. Conclusion: In conclusion, trapezius muscle thickness was found to be significantly lower in sedentary individuals compared to bodybuilders in both superficial and deep tissue layers. Moreover, 1RM values were significantly higher in bodybuilders.

Keywords

• One-repetition maximum
• Strength
• Trapezius muscle thickness.

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