Biceps femoris tendinitis (tendinopathy) is inflammation, or more likely degeneration of the hamstring tendon at the point where it attaches to the back of the knee.
On this page:
- Causes & anatomy
Symptoms of biceps femoris tendinopathy
- Tenderness and swelling where the tendon inserts into your tibia bone at the outside back of the knee.
- Pain is likely to have come on gradually. You may have had a ‘niggle’, or restriction that you have put up with for some time.
- You may feel stiffness at the back of the knee, which is often worse in the mornings, or after sitting for long periods.
- Often, when your tendon warms up pain eases off, only to return later.
A professional therapist will do a number of assessment tests and take a full case history to understand your injury. In particular, ‘resisted knee flexion’ (trying to bend your knee against resistance) may reproduce symptoms at the back of your knee. You may also show signs of tight hamstring muscles.
Causes & anatomy
The hamstring muscles
The hamstring muscles group consists of the biceps femoris, semitendinosus and semimembranosus muscles. These muscles are used to strongly bend the knee, and extend the hip backward.
A great deal of force is put through the hamstring muscles at speed when sprinting and jumping. In particular at the point just before your foot touches down when sprinting. This is because the muscles work eccentrically (contracting whilst also lengthening) to slow the forward movement of your lower leg.
Mechanism of injury
Inflammation, or degeneration of the biceps femoris tendon at the point it inserts into the tibia (shin bone) occurs. This is as a result of overuse, or may also develop after a partial rupture of your tendon which has not healed properly. Most commonly it is the biceps femoris tendon which is involved.
Tendonitis or tendinopathy?
The term tendonitis is most commonly used, however usually this is not strictly accurate. Tendonitis refers to an acute inflammation of the tendon where in actual fact unless the injury is very recent the pain is more likely due to long-term overuse and degeneration of the tendon. A broader and more accurate term for this type of tendon injury is tendinosis or tendinopathy.
Treatment of biceps femoris tendinopathy
What can the athlete do?
- If your injury is recent or acute then rest and apply ice or cold therapy for 10 to 15 minutes every hour for the first 24 to 48 hours.
- Wear an elastic type of support to help reduce any swelling and support the knee joint.
- Later, once the initial acute stage has passed, or if the injury is a long-term chronic condition then applying heat and wearing a heat retainer type knee support is likely to be more beneficial.
Once pain and swelling have gone, stretching and strengthening exercises can begin to restore the muscle and tendon to full fitness and make it stronger to prevent the injury recurring.
What can a professional do?
- A doctor may prescribe anti-inflammatory medication such as ibuprofen during the early stages to reduce pain, swelling, and inflammation. However, this is less appropriate in the later stages of rehabilitation.
- Applying ultrasound or laser treatment can also help with the inflammation and healing process.
- They may use cross friction massage techniques.
A full rehabilitation program consisting of stretching and strengthening exercises should be done as soon as pain allows. Gradually increasing the load through the tendon so it can cope with normal demands of sport is the aim. Eccentric exercises where the muscle contracts as it lengthens are very beneficial in treating tendinopathies.
Preventing hamstring tendon injuries
- Always ensure you follow a correct warm up before training or competition.
- Stretch the hamstring muscles both before and after training. Stretch every day, regardless of whether you are training or not.
- Strengthen the muscles to cope with the demands placed on them.
- Have regular sports massage to keep the muscles and tendons in good condition.
- Avoid doing too many accelerating/decelerating runs or hill work
- Biceps femoris tendon avulsion is where the tendon pulls a small piece of bone away with it.
- Hamstring strain is a tear to any of the hamstring muscles.