award png

Bone Injury

  1. What are bones made of?
  2. What keeps bones healthy?
  3. What is bone injury?
  4. How do we heal from bone injury?
  5. How do we prevent bone injury?

1. What are bones made of?

Bone are made of connective tissue reinforced with calcium and specialised bone cells. Just like muscle, bone is a living tissue with its own blood and nerve supply.

Bone has different layers to it, as described below:

This is the hard outer layer, akin to the shell of an egg

Compact bone
This is the layer underneath the periosteum, that gives bone its strength and stiffness

Spongy (cancellous) bone
This layer gives bone its flexibility and shock absorbing capacity

This innermost layer is responsible for producing blood cells and is soft


2. What keeps bones healthy?

Bones like to be exercised and have force going through them in order to keep them strong. If they are subjected to appropriate forces and loading, coupled with ample time for recovery after exercise, bone becomes denser and tougher. Bone also needs collagen, calcium and hormones like vitamin D to remain strong.

3. What is bone injury?

Sometimes it is obvious how bone has become injured (e.g., from a fall or trauma), but most of the time, there are many different contributing factors at play. Generally speaking, bones can be injured in one of 3 ways:

Acute fracture

This occurs when a bone is subjected to a sudden or powerful force that is greater than its elasticity. This can be a compressive, twisting or pulling force.

”In engineering terms, elasticity is the ability of a deformable body to resist a distorting effect and to return to its original size and shape when that influence or force is removed.”

This results in one or more of the bone layers deforming and breaking, causing a fracture. If this only occurs in the Periosteum (outer layer), it is called a hairline fracture. Fractures that go through all layers are more significant and often need immobilsation in a boot, cast or even surgery to stabilise the fracture.

Pathological fracture

This is when a bone’s elastic capability has been compromised due to poor bone quality.

The commonest reason for this is low bone density. However, there are many other reasons why bone quality may be adversely effected including metabolic and hormonal issues, medications and tumours. In pathological fractures, low energy forces with an innocuous mechanism can cause injury (e.g., trivial falls or knocks). Pathological fractures often need further investigation and management.

Stress injury and fracture

Stress injury or stress fracture is very common, particularly in people who do lots of high impact activity such as running or other sports.

If bone is continually exposed to repeated forces that are not high enough to cause an acute fracture, but without adequate time for healing and recovery, a stress reaction phenomenon may occur. The bone tries its best to heal rapidly and swells with fluid, a process called bone oedema or stress reaction.

The stress reaction process can be broken down into stages:

Stage 1 – The periosteum (or shell) of the bone becomes swollen and painful. The muscles that attach to the affected bone also become tender, tight and inflamed.
Stage 2 – The bone marrow inner layer becomes swollen.
Stage 3 – The compact and spongy bone layers between begin to swell.
Stage 4 – All the bone layers are now swollen with its integrity breached, and a fracture line develops. The stress reaction has now turned into a stress fracture.

bone fracture

4. How do we heal from bone injury?

Bone is incredibly good at healing itself after an injury. However, this process can take several weeks to months. Remodelling is the process where the old bone tissue is replaced by new healthy tissue.
In order for bone to Remodel, we need to provide our bodies with the optimum environment for healing. This includes:

Optimal loading

Under the appropriate loading conditions, bone injuries are stimulated to heal. Depending on the bone injury type, size and location, it is possible to determine the appropriate level of loading to aid fracture healing. This could range from complete oˇoading (non-weight bearing in a cast or crutches), partial loading (able to put some force through the injury) to full loading (able to put higher forces through the injury often with restrictions).


Maintaining a high calorie, balanced diet, rich in calcium along with Vitamin D is vital to give the body the energy and resources it needs to heal.


Prioritising sleep quality and quantity is key as this is the time where our body does most its healing.

Avoid alcohol and smoking

Both alcohol and smoking significantly delay bone healing. It is best to avoid them completely these whilst you are recovering.

Medical treatments

Some medicines and treatments can aid bone healing in certain circumstances. Your doctor will guide you if this applies to you.


Most stress injuries or stress fractures will not require surgery. In some cases, particularly with acute and pathological fractures, bones fragments can be surgically stabilised in order to help them to heal. It is important to remember that the surgical procedure does not itself heal bone, but just provides stability across the fracture site. It is vital to continue to optimise the other above points.

5. How do we prevent bone injury?

It is important to understand why bone has become injured in the first place in order to prevent it from occurring again.

Often, there are many factors that may have contributed to the injury, as summarised in the diagram below.

prevent bone injury

Overtraining (volume / frequency / type)

This is the most common risk factor for bone injury, particularly stress injuries. When changing your training volume, frequency or exposing your body to new types of training, it is important to allow your bone and soft tissues time to adapt to the change in stimulus. Be mindful of high-risk moments in your exercise plans, such as training for events or competitions. Incorporating rest and low impact days into your training week can be very useful.

Nutritional intake

It is important to ensure we have enough calories on board to allow bone to heal after exercise. If we train for prolonged periods of time in a calorie deficient state, we increase the risk of bone injury significantly. Making sure we have a healthy and balanced diet of macronutrients, as well as calcium and vitamin d is key.

Hormonal and metabolic factors

bone health and turnover is intrinsically linked with our hormonal systems. Hormone profiles differ with age and sex, making certain times of life more high risk for bone injury e. G. , adolescent years, post-menopausal, over 50 years old. Key hormonal and metabolic axes that play an important in bone health include:

  • Sex hormones (oestrogen, progesterone and testosterone)
  • Stress hormones (adrenaline, cortisol, aldosterone and angiotensin) Thyroid hormone
  • Parathyroid hormones
  • Iron

Medical factors

Certain medical issues can disrupt bone health and development making injury more likely. It is important to discuss these with your doctor to see if they are relevant.

Biomechanical factors

Our biomechanics can play an important role in how our skeletal system transmits force. It may be worth reviewing your biomechanics, particularly with running and sport, to reduce force transmission and optimise your technique. Optimising biomechanics may involve the following:

Running assessment

Sport specific assessments e.g., golf swing, tennis strokes Equipment e.g., racquet and club style, type Biomechanical adjuncts e.g., footwear, orthotics, braces


As described above sleep is key for bone healing and recovery. If we are getting less than 6-7 hours a night, and our sleep is of poor quality, our risk for injury significantly increases. Particularly if we are also very active during the day.

Strength and mass capacity

Bones need strong muscles and soft tissues around them to provide support. By improving the strength of our muscles, we can deflect force transmission away from our bones, leaving them less vulnerable to injury. A good example of this is improving calf strength to prevent shin splints.

Social, performance and financial pressure

We are often unaware of external pressures which may cause us to overtrain or train sub optimally. By mitigating these pressures, we can often train with more balance and purpose. Common examples of this include:

Pressure from social media

  • Pressure from friends, family and colleagues (e.g., to play in team games, commitment to social exercise and activity)
  • Financial commitments (e.g., professional or semi-pro sportspeople earning through sport)

Poor mental health and wellbeing

Although often overlooked, our mental health is intrinsically related to recovery and healing. Stress, low mood and anxiety can cause internal inflammation within the body and significantly compromise bone health, leave us vulnerable to injury and delay healing. Getting help from a suitably qualified mental health or sports psychology professional is essential when looking after our heath or wellbeing.

bone injury download
Recent posts
Subscribe to the free sports medicine newsletter

The medical world can sometimes be daunting. Our experts discuss the latest medical updates in the sport, health and fitness world, and break it down for you into and an easy to understand, digestible summary. And of course, it’s free.

If you have a particular health care question in mind, please get in touch to let us know and we will do our best to guide you.

The LBSM newsletter, written by our doctors, for our patients.

ISOBAR Referral

ISOBAR Referral Form
  • Patient Details
  • Clinician Details
  • Garments
    • Payment
    Patient Address
    Patient Address
    Postal Code
    Orla Mulligan
    Administration and Social Media Manager
    Administration, LBSM

    Orla Mulligan is the administration and social media manager for LBSM. She has a strong background in sport having herself played netball at an elite standard for the U21s Northern Ireland team in the European Championships as well as the U21s competition for Saracen Mavericks.

    She understands youth sport pathways having herself played and training in the netball Kent regional pathway. She has a keen interest in most sports and a good understanding of how injury and illness can impact on the mind and body, as well as rehabilitation pathways.

    She looks forward to speaking and assisting LBSM patients and gives her best support to them during their treatment pathway.

    A day in the life of Orla involves communicating with patients via phone and email, managing and organising clinics, operations and media management.

    Outside of work, Orla is a gym enthusiast, enjoys tennis and still finds the time for an occasional game of netball.

    Maddie Tait
    BSc, MSc
    Associate, LBSM
    Musculoskeletal and Sports Podiatrist

    Maddie treats and manages complex foot and ankle injuries in London and Surrey.

    She is particularly interested in helping her patients improve their quality of life and achieve their personal goals, working closely with Foot and Ankle Consultants, Sports Medicine Doctors and Physiotherapists.

    Maddie has a sporting background herself having previously represented England in Hockey. She understands the demands of elite sport and the importance of physical and mental health. In her spare time, Maddie continues to enjoy an active lifestyle by running, cycling and attending a Pilates class.

    Having graduated from University of Brighton with a MSc (hons) in Podiatry, Maddie focused her career in Podiatric Sports Injuries and Biomechanics. Previously she completed a BSc (hons) in Sport Science at Loughborough University.

    A day in the life of Maddie involves consulting patients in clinic, performing gait and biomechanical assessments, measuring and fitting orthotics and braces. She also regularly teaches and presents at sports medicine and podiatry conferences.

    Outside of work, Maddie still finds time to play hockey and enjoys running and skiing.

    Mr Prakash Saha
    Consultant Partner, LBSM
    Consultant in Vascular Surgery

    Mr Prakash Saha is a Consultant Vascular Surgeon at LBSM. He takes pride in providing the best possible results for his patients by using the most appropriate non-surgical and surgical methods based on clinical evidence, patient results and satisfaction.

    He treats fit and active people suffering with a range of cardiovascular issues, from painful leg swelling associated with exercise to venous insufficiency, post-thrombotic syndrome and leg ulcers. He also treats people with arterial system problems including poor circulation, compression syndromes and aneurysms. He carries out both endovascular and open aortic repair and has some of the best outcomes in the country.

    Mr Saha studied medicine at the United Medical & Dental Schools at Guy’s and St. Thomas’ Hospitals before completing his higher surgical training in London and the South East. During this time, he was awarded the prestigious NIHR Clinical Lectureship in Vascular Surgery at St. Thomas’ Hospital, giving him comprehensive training in open and endovascular techniques for treating arterial and venous disease. Prakash completed his aortic surgery training at the St. George’s Vascular Institute before carrying out a specialist fellowship at the Royal Prince Alfred Hospital, Sydney.

    Mr Saha regularly lectures and runs workshops across the globe on the latest surgical techniques to treat vascular disease. He has also been awarded a number of research grants from the Royal College of Surgeons, the Circulation Foundation, the Wellcome Trust, the Academy of Medical Sciences, and the British Heart Foundation, which has led to over 80 publications and the development of innovative technologies to help treat patients. For this work, Prakash has received a number of prizes, including the Venous Forum prize from the Vascular Society of Great Britain and Ireland, an International Young Investigator Award, and an Early Career Investigator Award from the American Heart Association.

    A day in the life of Mr Saha involves seeing patients in clinic, operating in surgical theatre or lecturing at his university. He also regularly teaches and presents at vascular and sports medicine conferences.

    Mr Saha is an avid cyclist and tennis player (although yet to get a set of Dr Seth!). Outside of work, he spends time with his family who consists of 3 children and enjoys travelling.

    Dr Gajan Rajeswaran
    Consultant Partner, LBSM
    Consultant in Sports and Musculoskeletal Radiology

    Dr Gajan Rajeswaran is a Consultant Musculoskeletal Radiologist at LBSM, with an extensive background of working in elite sport. He is one of the most recognised radiologists in the sports medicine field. He provides top level imaging and medical diagnostic services for patients and athletes.

    Dr Gajan Rajeswaran completed his undergraduate medical training at Imperial College London and his radiology training at Chelsea & Westminster Hospital. He has obtained two post-CCT fellowships in musculoskeletal imaging. He was appointed as a consultant at Chelsea & Westminster Hospital in 2011.

    He has a passion for all sports having worked as a radiologist at the Glasgow Commonwealth Games and London World Athletic Championships and continues to support The Championships, Wimbledon. He also continues to work with a number of Premier League and Championship Football Clubs, Premier League Rugby Clubs, England Sevens Rugby, British Athletics and the Lawn Tennis Association.

    A day in the life of Dr Rajeswaran involves giving his expert opinion on investigations such as MRI and CT scans, x-rays and ultrasound. He also performs injection lists under ultrasound, CT and X-ray including spinal injections. He also regularly teaches and presents at sports medicine conferences.

    Dr Gajan Rajeswaran is an avid football fan and life-long fan of Tottenham Hotspur (for which he offers no apologies!). Outside of work, he spends time with his family and has a keen passion for photography.

    Dr Ajai Seth
    Medical Director, LBSM
    Consultant in Sport and Exercise Medicine

    Dr Ajai Seth is a Sport and Exercise Medicine Physician. He has dedicated his career to helping people with sport and exercise related injury and illness. He consults and treats everyone from the elite athlete to the weekend warrior.

    Dr Ajai Seth is part of the British Tennis Sports Physician team at the LTA and has also provided cover to elite athletes at Wimbledon Tennis, European Tour Golf, Premier League Football, British Athletics, and the Men’s England Football academies as part of the FA.

    He also prides himself for working in disability sport and is currently the Chief Medical Officer for Team GB Wheelchair Tennis which has taken him to the Olympics and Paralympics.

    Dr Ajai Seth is dedicated to education, training and research and is a Senior Lecturer in Sports Medicine at King’s College London where he lectures in all aspects of Sports Medicine and Science.

    He also has a passion for travel and Expedition Medicine, which has seen him accompany medical, scientific and charity expeditions all around the world. He also has vast experience in treating musculoskeletal injuries from children and adolescents to veteran exercisers, both male and female.

    Dr Seth also has positions in leading Sport Medicine organisations, including the non-executive board for the UK’s largest Sports Medicine charity, BASEM and Past President for the Royal Society of Medicine. 

    A day in the working life of Dr Seth involves consulting his patients in clinic, performing diagnostics and ultrasound guided injections. He also regularly lectures and tutors students and presents at sports medicine conferences internationally. He also spends part of the working week at the National Tennis Centre, LTA, supporting British Tennis players.

    Outside of work, Dr Seth enjoys playing club tennis, triathlon, golf, running and skiing (but will give any sport a go!). He enjoys keeping fit and active and good quality family time with his wife and three children.