The Study
Characteristics of Anterior Shoulder Instability and Hyperlaxity in the Weight-Training Population
This study shows that weightlifters were more likely to have loose shoulders and positive instability tests compared to non-lifters. It can show a link, but not prove that lifting caused the problem — it's like noticing ice cream sales and sunburns both go up in summer, but not proving one causes the other.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
Some shoulder exercises might make young weightlifters' shoulders less stable, even if they don’t feel pain.
Where does this study sit?
Systematic Reviews & Meta-analyses
Max 100Randomized Trials
Max 90Cohort Studies
Max 72Case-Control
Max 58Cross-Sectional
Max 44Case Reports & Series
Max 30Expert Opinion
Max 537 / 100
Quality score
Detailed descriptions of individual patients or small groups. Valuable for identifying new conditions or side effects, but cannot establish generalizable conclusions.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Even though these men didn’t have pain, their shoulders showed warning signs that could lead to problems later.
- 2Weightlifters had looser shoulders (p = 0.004) and more positive instability tests (p < 0.001) than non-lifters.
- 3Doing behind-the-neck pulls or military presses was linked to instability.
- 4Strengthening shoulder rotators was linked to more stability.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Journal of Strength and Conditioning Research
Year
2013
Authors
M. Kolber, Melissa Corrao, W. Hanney
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.