children, adolescents and adults. Objective of the present study was to find the differences of biacromial breadth index (BABI), biiliocristal breadth index (BILBI) and AI in adult male weightlifters and non-athletes. A cross-sectional study was carried out in the High-Performance Sports Center of the Yucatan State and in a university, both in Merida City, Mexico. Participants were 20 to 24-year-old male weightlifters (n = 25) and non-athlete university students (n = 25). The weightlifters had participated in the national level championships in the weight categories between 67 kg and 81 kg, following International Weightlifting Federation guideline. Anthropometric measurements of biacromial diameter (BAD) and biiliocristal diameter (BILD) were recorded. The BABI (BAD/height x100), BILBI (BILD/height x100) and AI (3 x BAD – BILD) were calculated. Mean values of age (23.06 years) and BILD (28.45 cm) showed no significant difference (p> 0.05) between weightlifters and non-athletes. Weightlifters were taller (168.65 ± 8.63 cm) than non-athlete peers (166.08 ± 9.63 cm). However, difference between the mean values was not significant (p>0.05). The BAD (weightlifters = 40.15 cm, non-athletes = 36.97 cm), BABI (weightlifters = 23.82, non-athletes = 22.28) and AI (weightlifters = 91.79, non-athletes = 82.68) had significant differences (p< 0.05) of mean values between the two groups. Discriminant function analysis using AI as the predictor, correct classification rate to distinguish between weightlifters and non-athletes was 82.0%. Canonical correlation coefficient (0.68), Box’s M (value = 2.74, p = 0.10), chi-square (value = 29.34, p< 0.001) and Wilks’ lambda (value = 0.54, p< 0.001) in the model, established significant difference between weightlifters and non-athletes with respect to the AI. The BABI and AI are useful to study athletic physique and their differences with non-athletes.