Testosterone and Spinal Cord Injury: A Doctor Explains the Hidden Hormonal Changes

A doctor’s evidence-based explanation of the science, symptoms and pathways behind this topic.

Written by Dr Bikram Ratti MBBS (London) MRCGP
Private GP & Men’s Health Specialist
The Doctor’s Practice, Birmingham
Instagram: @thedoctorspractice | @drbikofficial | @drrinkuofficial

Introduction

In my work at The Doctors Practice in Edgbaston, Birmingham, one topic that receives surprisingly little attention is hormonal health after spinal cord injury.

When spinal cord injury (SCI) is discussed, the focus is understandably neurological: mobility, sensation, rehabilitation and physiotherapy. Yet recovery after injury is never purely neurological. The endocrine system — the network of hormones regulating metabolism, muscle physiology and energy balance — is deeply interconnected with these processes.

Testosterone is central to this system. It influences muscle mass, bone density, metabolic health, mood and energy levels. Following spinal cord injury, testosterone levels may change, and recognising these changes can be an important part of long-term health management.

Spinal cord injury affects multiple physiological systems beyond the nervous system. Research suggests endocrine changes, including testosterone deficiency, may occur in some men after injury. These hormonal shifts may influence body composition, metabolic health and functional outcomes, which is why clinicians increasingly consider hormonal health as part of comprehensive rehabilitation.

The Science Behind Testosterone Regulation

Testosterone production is regulated by the hypothalamic–pituitary–gonadal (HPG) axis.

The hypothalamus releases gonadotropin-releasing hormone (GnRH), stimulating the pituitary gland to produce luteinising hormone (LH). LH then signals the testes to produce testosterone.

This hormonal system responds to several physiological signals, including metabolic status, inflammatory signalling, sleep regulation and neurological input.

Following spinal cord injury, several of these regulatory pathways may be altered. Trauma, reduced physical activity, systemic inflammation and metabolic changes can all influence endocrine balance. Reviews discussing endocrine dysfunction after neurological injury highlight that hormonal disturbances — including changes in testosterone levels — may develop following spinal cord trauma.

These changes may not be immediately apparent during early rehabilitation but can become more relevant over time.

Biological Mechanisms Linking Spinal Cord Injury and Testosterone

The mechanisms behind testosterone changes after spinal cord injury appear to be multifactorial.

Reduced physical activity following injury may alter body composition and metabolic physiology. Increased adipose tissue can influence hormonal metabolism through aromatase activity, which converts testosterone into oestrogen.

Inflammatory responses following trauma may also influence hypothalamic signalling and endocrine regulation.

Research discussing endocrine dysfunction after spinal cord injury notes that hormonal disturbances may occur alongside changes in body composition and physical function. These complex interactions highlight why hormonal health can influence long-term outcomes following neurological injury.

Symptoms and Clinical Patterns

Low testosterone after spinal cord injury does not always present dramatically.

Many symptoms overlap with broader physiological effects of neurological trauma, which can make diagnosis challenging.

Some patients report:

• persistent fatigue
  • reduced muscle mass
  • increased body fat
  • reduced libido
  • lower mood or motivation
  • slower recovery of physical conditioning

Because these symptoms are often attributed solely to the spinal injury itself, hormonal imbalance may remain undiagnosed unless clinicians actively consider it.

In clinical practice, these patterns sometimes prompt further hormonal investigation.

Latest Research

Research examining endocrine changes after spinal cord injury suggests testosterone deficiency may occur more frequently in men with SCI compared with the general population.

A systematic review published in BMJ Open examined testosterone levels in men with spinal cord injury and highlighted the prevalence of hypogonadism within this group. The authors discuss how hormonal deficiency may contribute to metabolic changes and reduced physical capacity in some patients.

Other research exploring endocrine consequences of neurological trauma discusses how testosterone deficiency may be associated with altered body composition and functional outcomes following injury.

Earlier rehabilitation research has also described hormonal disturbances following spinal cord injury and their potential implications for metabolic health and musculoskeletal physiology.

Importantly, these studies emphasise that hormonal responses to spinal cord injury vary significantly between individuals.

Myths vs Facts

One misconception is that testosterone deficiency inevitably occurs after spinal cord injury.

In reality, hormonal levels vary widely between patients. Many men maintain normal testosterone levels following injury.

Another myth is that fatigue or reduced strength must simply be accepted as part of neurological recovery. While spinal cord injury affects multiple physiological systems, hormonal imbalance may sometimes contribute to these symptoms.

Equally, testosterone therapy is not a universal solution. Treatment decisions must always be guided by symptoms, clinical evaluation and laboratory results.

Evidence-Based Treatment Pathways

When symptoms suggest possible hormonal imbalance, the first step is careful medical assessment.

Hormonal evaluation typically includes morning testosterone levels alongside related markers such as luteinising hormone and sex hormone-binding globulin.

At our clinic this assessment can be arranged through our tests and diagnostics service and discussed during a detailed private GP consultation.

If biochemical testosterone deficiency is confirmed and symptoms are consistent, testosterone replacement therapy may be considered according to recognised clinical guidance.

Men interested in broader hormonal health may also benefit from reviewing our overview of men’s health servicesand the role of preventive health screening in long-term wellbeing.

Treatment decisions must always be individualised and medically supervised.

Lifestyle and Hormonal Health After Spinal Cord Injury

Hormonal balance is influenced by several lifestyle factors.

Rehabilitation programmes that incorporate resistance training and metabolic conditioning may support muscle preservation and endocrine health. Nutrition, sleep regulation and maintaining healthy body composition also play important roles.

For many individuals, hormonal optimisation forms part of a broader strategy to support long-term health after spinal cord injury.

Assessment at The Doctor’s Practice

At The Doctor’s Practice — a private GP-led clinic in Edgbaston, Birmingham — men living with spinal cord injury can undergo a comprehensive medical review that includes hormonal health when appropriate.

Consultations may explore symptoms, metabolic health and rehabilitation progress. Where clinically indicated, targeted blood tests can assess testosterone and related hormones.

The aim is not simply hormone replacement, but a thoughtful and personalised approach to long-term health following neurological injury.

FAQs

Can spinal cord injury reduce testosterone levels?
Research suggests testosterone deficiency may occur more frequently in men with spinal cord injury than in the general population.

Should testosterone levels be tested after spinal cord injury?
Testing may be appropriate when symptoms such as fatigue, reduced muscle mass or reduced libido are present.

Does testosterone therapy improve recovery after spinal cord injury?
Testosterone plays an important role in muscle metabolism and energy regulation, but it does not replace neurological rehabilitation or physiotherapy.

Where can I have testosterone testing in Birmingham?
Hormonal testing and medical evaluation are available at our private doctor clinic in Edgbaston, Birmingham.

Personal Note

Spinal cord injury changes many aspects of physiology, and hormonal health is sometimes overlooked during the early phases of recovery.

Testosterone is only one part of a complex system, but it can influence energy, muscle metabolism and long-term metabolic health. Recognising these changes allows clinicians to support recovery more comprehensively.

For many patients, recovery is not just neurological — it is systemic.

Book an Appointment with Dr Bik

The Doctors Practice
7 Chad Square, Hawthorne Road
Edgbaston, Birmingham B15 3TQ

Website: https://www.thedoctorspractice.co.uk
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References

Bauman WA et al. Endocrine dysfunction after spinal cord injury and traumatic brain injury: implications for rehabilitation and health outcomes. Frontiers in Endocrinology. 2023.
https://pmc.ncbi.nlm.nih.gov/articles/PMC9968415/

Groah SL et al. Prevalence of testosterone deficiency among men with spinal cord injury: a systematic review. BMJ Open. 2017;7:e014125.
https://bmjopen.bmj.com/content/7/4/e014125

Bauman WA, Spungen AM. Hormonal changes after spinal cord injury and their clinical implications. Journal of Rehabilitation Research and Development. 2008.
https://pubmed.ncbi.nlm.nih.gov/18716488/