Bodybuilder Suffers Rare Spontaneous Kidney Rupture After Intense Weighted Crunch Regimen

A 49-year-old competitive bodybuilder developed a spontaneous left kidney rupture after completing three consecutive days of high-repetition weighted abdominal crunches, according to a case report published in Urology Case Reports by physicians at Al-Amiri Hospital in Kuwait.

The athlete performed approximately 300 weighted crunches using loads up to 120 kilograms over the three-day period. On the third day, he felt a distinct pop and mild pain in his left flank but continued training. The following day, during a heavy incline bench press exceeding 300 kilograms, the pain became severe enough to require emergency care.

Clinical Presentation and Imaging Findings

Upon arrival, the patient was afebrile with normal blood pressure and no external signs of trauma. His left abdomen was notably swollen, rigid, and guarded. Laboratory work revealed elevated serum creatinine, though no baseline values were available for comparison. Computed tomography identified a grade III renal laceration — a deep tear extending through the lower pole of the kidney — accompanied by a large perinephric hematoma measuring approximately 16.5 × 14.5 × 13.5 centimeters.

Complicated Hospital Course

Initial management consisted of bed rest, hemodynamic monitoring, and analgesia after follow-up imaging showed no active extravasation. However, the patient’s blood pressure remained elevated at roughly 160/100 mm Hg, prompting intravenous antihypertensive therapy.

Two days later, his condition deteriorated: pain and abdominal distension worsened, blood pressure surged above 200 mm Hg, and hemoglobin dropped sharply. Repeat imaging demonstrated hematoma expansion with active arterial bleeding from the lower renal segment. Interventional radiologists performed selective angioembolization via femoral access, deploying multiple microcoils to occlude the bleeding vessel.

The post-procedure course was complicated by transient pulmonary edema requiring brief intensive care monitoring. The patient was discharged nine days after admission on continued antihypertensive therapy. At one-month follow-up, the hematoma had decreased only marginally, and renal function — while improving — remained mildly impaired. He was cleared for gradual return to light resistance training.

Context: Spontaneous Renal Rupture and Potential Etiologies

Spontaneous kidney rupture, first documented in 1856, is uncommon and typically signals underlying renal pathology. Literature estimates suggest 95% of cases arise from preexisting conditions, with a 2002 meta-analysis of 165 cases attributing 61% to neoplasms and 17% to vascular anomalies. Only two prior exercise-associated cases have been reported: one involving a ureteropelvic junction obstruction unmasked by heavy lifting, and another revealing renal cell carcinoma.

This patient had no identifiable renal disease on imaging, making the case distinctive. The authors hypothesize that chronic anabolic steroid use, combined with extreme intra-abdominal pressure generated during heavy loaded crunches and compound lifts, may have precipitated the rupture. Persistently elevated inpatient blood pressure readings also raise the possibility of undiagnosed hypertension.

Anabolic steroids carry well-established cardiovascular and renal risks, including hypertension, accelerated atherosclerosis, and direct nephrotoxicity. A 2009 Columbia University study of long-term steroid-using bodybuilders documented universal proteinuria and significant renal impairment with biopsy-proven focal segmental glomerulosclerosis — though these findings reflect chronic injury rather than acute rupture.

The authors emphasize that causality cannot be definitively established from a single case report reliant on self-reported substance use and lacking baseline renal data.

Clinical Takeaways

This case underscores the importance of heeding acute warning signs during exertion. A sudden “pop” followed by flank or abdominal pain — particularly when accompanied by swelling, lightheadedness, or hematuria — warrants immediate medical evaluation. Athletes using anabolic steroids should disclose this history to their clinicians given the drugs’ effects on blood pressure and renal vasculature.

No standardized return-to-sport protocol exists for traumatic renal injuries of this nature. Existing survey data suggest athletes with grade I–III injuries typically resume activity at two weeks, while grade IV–V injuries require three to six weeks. The paucity of comparable cases precludes evidence-based guidance for this scenario.

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