Impact of post-bariatric lipoabdominoplasty on knee and hip function: A biomechanical and symptomatic analysis

Massive weight loss after bariatric surgery frequently results in redundant abdominal skin that can compromise posture, gait, and joint biomechanics. This prospective study investigated the functional effects of circumferential lipoabdominoplasty in post-bariatric patients. Eighteen individuals (mean BMI 29.3 kg/m²), all weight-stable for at least 12 months, underwent 360° lipoabdominoplasty with removal of ≥4 kg of tissue. Hip and knee range of motion (ROM) was measured preoperatively, at 1 month, and at 12 months postoperatively. Patient-reported outcomes were assessed using the BODY-Q Physical Symptoms (PS) and Physical Function (PF) domains. At 12 months, mean hip flexion improved from 110° ± 8° to 120° ± 7°, and knee flexion from 130° ± 10° to 140° ± 9° (p < 0.05). PS scores increased from 58 ± 10 to 80 ± 9, and PF from 60 ± 11 to 79 ± 8 (p < 0.05). No significant correlation was observed between ROM gains and BODY-Q scores, suggesting that improvements are mediated by mechanical release, postural realignment, and psychosocial benefits rather than mobility alone. These findings indicate that lipoabdominoplasty, while traditionally performed for aesthetic purposes, may play a significant role in enhancing functional recovery and quality of life following massive weight loss.