From the Research
Relationship Between Penis Size and Muscle Bulk
- There is no direct evidence to suggest that penis size increases with muscle bulk (muscle hypertrophy) in males 1, 2, 3, 4, 5.
- Studies have focused on measuring penile dimensions and investigating factors that influence penis size, but none have explored the relationship between muscle bulk and penis size.
Factors Influencing Penis Size
- Research has identified various factors that can influence penis size, including age, body mass index (BMI), and geographic region 3, 4, 5.
- A study found a weak negative correlation between BMI and erect penile length, suggesting that higher BMI may be associated with shorter penile length 5.
- Another study found that erect penile length increased significantly over time, with an average increase of 24% over the past 29 years 4.
Measurement of Penile Dimensions
- Studies have used different methods to measure penile dimensions, including self-reported measurements and measurements taken by researchers 1, 3, 5.
- The accuracy of self-reported measurements can be influenced by various biases, including volunteer bias and social desirability bias 1.
- Researchers have emphasized the importance of measuring erect penile size and allowing for infra-pubic fat interference in measurement 5.