Pediatric Research Update: Growing Under Pressure: Obesity and Children’s Musculoskeletal Health

Article Summary

Physical activity is a fundamental pillar of a healthy lifestyle and an essential part of effective weight management for children and adolescents, supporting healthy growth, physical and mental well-being, and prevention of excessive weight gain during critical developmental years. The article, "Consequences of Overweight and Obesity on the Musculoskeletal System in Children: A Review of Recent Literature," examines how excess body weight stresses developing bones, joints, muscles, and connective tissues, potentially leading to orthopedic and functional complications that can persist into adulthood. By synthesizing current evidence, the review offers valuable insight for clinical practice, targeted intervention, and future research aimed at improving long-term musculoskeletal health in children and adolescents.

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Article Review

One of your 12-year-old patients comes in for a weight management follow-up with a fluorescent cast on their right arm. They fell off their bike over the summer, they explain, breaking it in two places. It is a common story, but it happens more often in children affected by overweight and obesity. Mikszta et al. (2025), "Consequences of overweight and obesity on the musculoskeletal system in children: a review of recent literature," lays out why: adiposity places real, measurable strain on the growing skeleton, in ways that go well beyond simple wear and tear.

Physical activity is one of the core pillars of comprehensive obesity care, and current guidelines recommend 60 minutes of daily activity for children and adolescents. But recommending it well means more than repeating that number back to families. It means knowing what makes movement harder, or riskier, for a growing body carrying excess weight, and individualizing the plan accordingly for each child's stage of growth and development. This review organizes those concerns into five areas: increased mechanical load, chronic inflammation, hormonal and metabolic abnormalities, increased injury risk, and postural abnormalities. Below is a summary of each, with practice, treatment, and advocacy considerations for obesity medicine clinicians.

1. Increased Mechanical Load

Excess body mass increases mechanical stress on weight-bearing joints, particularly the hips and knees. Over time, this can drive joint pain, reduced mobility, gait changes, and activity avoidance, feeding a cycle of pain, inactivity, and further weight gain. The review also notes a higher incidence of specific orthopedic conditions in children with obesity, including slipped capital femoral epiphysis and Blount's disease.

Clinically, ask about joint pain, exercise intolerance, and gait changes as part of routine obesity visits, and incorporate a basic assessment of movement and mobility rather than waiting for a child to volunteer that something hurts. Refer to physical therapy or pediatric orthopedics when symptoms are significant. Favor joint-friendly activities such as swimming, cycling, yoga, or tai chi, which build fitness without loading the joints as heavily. On the advocacy side, support school and community programs that make low-impact movement genuinely accessible to children with obesity.

2. Chronic Inflammation

Excess adipose tissue behaves like an active endocrine organ, releasing pro-inflammatory cytokines that create a state of chronic low-grade inflammation. Over time, this can interfere with bone remodeling and physical function, contributing to pain, mobility limits, and reduced quality of life.

A thorough visit should assess mobility, functional status, and quality of life, and screen for psychosocial barriers to activity, with referrals to physical therapy, exercise physiology, or behavioral health as needed. Treatment should build activity gradually through low-impact exercise that improves flexibility and endurance while addressing barriers to participation. Consider adding standardized quality-of-life or functional-status measures to routine obesity visits, and expanding access to behavioral health support alongside physical activity resources.

3. Hormonal and Metabolic Effects

Childhood obesity is linked to insulin resistance and vitamin D insufficiency, both of which can impair bone mineralization, and to obstructive sleep apnea, which through intermittent hypoxia may further increase bone resorption. Notably, the review highlights an "obesity paradox": children with obesity often have higher bone mineral density, yet still carry a higher fracture risk, a reminder that bone quantity alone does not guarantee bone strength.

Evaluation should address relevant metabolic and nutritional risk factors, with laboratory testing guided by clinical indications, with dietitian referral and supplementation as appropriate. Because the evidence on how weight loss affects bone density in children is still mixed, some studies showing little change and others a temporary dip in limb bone mass, it is worth monitoring bone health during active treatment rather than assuming weight loss is uniformly protective for the skeleton. Multidisciplinary care pathways that build in this kind of nutritional and metabolic screening will serve patients best.

4. Increased Risk of Injury

Altered biomechanics, reduced balance, and lower fitness raise the risk of falls and injury in children with obesity, contributing to fractures, soft-tissue injuries, and avoidance of sports and recreation. Limb fractures may occur more frequently in children with obesity, and some evidence suggests that these injuries may be more severe when they occur.

Routine visits should include balance, gait, and fall-history assessment, with physical therapy referral for children showing gait abnormalities or recurrent injury. Ask, too, about activities a child has quietly stopped doing, since avoidance is often easier to spot than the underlying balance or strength deficit driving it. Favor lower-risk activities such as walking, swimming, dance, or martial arts, which build strength and coordination while limiting fall risk. Partnering with schools on inclusive, safety-focused activity programs extends this protection beyond the clinic and into daily life.

5. Postural Abnormalities

Excess weight can contribute to changes in posture, including lumbar hyperlordosis, flexible flatfoot, and thoracic kyphosis. These changes may contribute to back pain, lower extremity discomfort, fatigue, and reduced physical activity.

During the musculoskeletal examination, assess posture, spinal alignment, gait, and foot structure, and ask about pain and limitations with daily activities or exercise. Encourage low-impact activities such as swimming and cycling. Physical therapy, footwear or orthotic assessment, podiatry, or referral to pediatric orthopedics may be helpful when symptoms or functional limitations are present.

When to Evaluate Further

Not every postural change in a child with obesity indicates an underlying orthopedic problem. Flexible flatfoot, mild lumbar lordosis, and posture-related discomfort may improve with strengthening, appropriate footwear, physical therapy, and gradual progression of activity. Persistent or worsening pain, asymmetric posture, neurologic symptoms, significant gait abnormalities, focal tenderness, limited range of motion, or declining function should prompt further evaluation and consideration of referral to pediatric orthopedics.

Key Takeaways

1. Obesity can affect posture and movement. Postural changes may contribute to pain, fatigue, and reduced participation in physical activity.
2. Include a basic musculoskeletal assessment in obesity visits. Ask about pain, gait changes, activity limitations, and falls, and assess posture, spinal alignment, and foot structure when appropriate.
3. Keep physical activity individualized and practical. Start with activities that are comfortable and sustainable, such as swimming, cycling, walking, or other low-impact options, and refer for additional evaluation when symptoms or functional limitations persist.

Conclusion

The musculoskeletal effects of pediatric obesity are complex and can affect mobility, physical activity, and quality of life. Routine assessment, individualized activity recommendations, and timely referral can help children stay active and prevent minor problems from becoming barriers to movement. As treatment options for pediatric obesity continue to evolve, more research is needed to understand their effects on bone health, mobility, and injury risk. Treating the whole child means making musculoskeletal health part of routine obesity care.