Does running accelerate the development of osteoarthritis?
There are so many misconceptions about running and how bad it can be for your joints. You may have heard many friends and family members comment on this and they may have even tried to convince you to stop running and go swimming instead. Here is what the scientific research tells us so far:
Osteoarthritis (OA) is a musculoskeletal condition that involves degeneration of the joints and impact during weightbearing exercise such as running and may contribute to joint loads. There is very little evidence however, that running causes OA in the knees or hips. One study reported in 1985 by Sohn and Micheli compared incidence of hip and knee pain and surgery over 25 years in 504 former cross-country runners. Only 0.8% of the runners needed surgery for OA in this time and the researchers concluded that moderate running (25.4 miles/week on average) was not associated with increased incidence of OA.
In another smaller study of 35 older runners and 38 controls with a mean age of 63 years, researchers looked at progression of OA over 5 years in the hands, lumbar spine and knees (Lane et al. 1993) . They used questionnaires and x-rays as measurement tools. In a span of 5 years, both groups had some participants who developed OA- but found that running did not increase the rate of OA in the knees. They reported that the 12% risk of developing knee OA in their group could be attributed to aging and not to running. In 2008, a group of researchers reported results from a longitudinal study in which 45 long distance runners and 53 non-runners were followed for 21 years. Assessment of their knee X-Rays, revealed that runners did not have a higher risk of developing OA than the non-running control group. They did note however, that the subjects with worse OA on x-ray also had higher BMI (Body Mass Index) and some early arthritic change in their knees at the outset of the study.
Is it better to walk than to run?
It is a common belief that it must be better to walk than to run to protect your joints. In a recent study comparing the effects of running and walking on the development of OA and hip replacement risk, the incidence of hip OA was 2.6% in the running group, compared with 4.7% in the walking group (Williams et al 2013). The percentage of walkers who eventually required a hip replacement was 0.7%, while in the running group, it was lower at 0.3%. Although the incidence is small, the authors suggest the chance of runners developing OA of the hip is less than walkers.
In the same study, Williams and colleagues reinforced that running actually helped keep middle-age weight gain down. As excess weight may correlate with increased risk of developing OA, running may reduce the risks of OA. The relationship between bodyweight and knee OA has been well-established in scientific studies, so running for fitness and keeping your weight under control is much less likely to wear out your knees than being inactive and carrying excess weight.
Is there a limit?
Recent studies have shown that we should be doing 30 minutes of moderate exercise daily to prevent cardiovascular disease and diabetes. But with running, researchers still have not established the exact dosage of runners that has optimal health effects. Hansen and colleagues’ review of the evidence to date reported that the current literature is inconclusive about the possible relationship about running volume and development of OA but suggested that physiotherapists can help runners by correcting gait abnormalities, treating injuries appropriately and encouraging them to keep the BMI down.
We still do not know how much is “too much” for our joints. However, we do know that with age, we expect degenerative changes to occur in the joints whether we run or not. Osteoarthritis is just as common as getting grey hair. The important thing is that we keep the joints as happy and healthy as possible.
How do you start running?
If you are not a runner and would like to start running, walking would be a good way to start and then work your way up to short running intervals and then longer intervals as you improve your fitness and allow time for your body to adapt. Therefore, running in general is not bad for the joints. It does not seem to increase our risk of developing OA in the hips and knees. But the way you run, the way you train and how fast you change your running frequency and distance may play a role in future injuries of the joints.
WEIGHT TRAINING INJURIES
Improper weight-training techniques can lead to weight training injuries. The most common areas to be injured are the back, shoulders, and knees.
Back sprains and strains most commonly result from improper lifting technique when performing exercises such as bench presses, deadlifts, and rows. Sprains involve stretching of ligaments while strains involve stretching of muscles or tendons. Initial treatment involves the R.I.C.E. method (i.e. Rest, Ice, Compression, and Elevation). Assessment and treatment by your physiotherapist are also valuable. At Saanich Physio your Physiotherapist can help you minimise the risk of obtaining weight training injuries.
Training Tip: The risk of back injuries can be reduced by maintaining a neutral spine and avoiding flexing or extending the lower back under heavy load.
Lifting weights overhead incorrectly can lead to injuries such as shoulder impingement syndrome and rotator cuff damage. Shoulder impingement syndrome is when swelling and inflammation of structures in, and around the shoulder results in pain in the front and side of the shoulder/upper arm. Rotator cuff damage causes pain and weakness of shoulder movement. Treatment for these conditions may include physiotherapy and anti-inflammatory medication in minor cases; and cortisone injections and potentially surgery in more serious cases.
Training Tip: The risk of shoulder injuries increases with excessive repetitions. Ensure you also train other body parts to give your shoulders adequate recovery time between training sessions.
Repetitive knee exercises such as squats, lunges, deep knee bends, jumps, knee extension and leg lifts can cause pain at the front of the knee. Injury to the patellar tendon (the tendon that connects the kneecap to the shin bone) can occur with overuse. Small tears develop in the tendon leading to pain just below the kneecap. Treatment in the form of physiotherapy and a patellar tendon strap often helps to reduce symptoms and your doctor may also recommend anti-inflammatory medications.
Training Tip: Ensure that your kneecap tracks correctly (i.e. over the outside of the foot) during squat and lunge exercises.
If you feel pain from weight lifting in the gym seek treatment and corrective strategies from us at Saanich Physio. The longer you keep training with an injury or small niggles that can turn into bigger injuries, the longer your recovery time will be. Seek help early and keep yourself in the gym – there is no need to suffer from weight training injuries.
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Kerr ZY, Collins CL, Comstock RD. Epidemiology of weight training-related injuries presenting to United States emergency departments, 1990 to 2007. Am J Sports Med 2010; 38(4): 765-71.
Mazur LJ, Yetman RJ, Risser WL. Weight-training injuries. Common injuries and preventative methods. Sports Med 1993; 16(1): 57-63.
Siewe J et al. Injuries and Overuse Syndromes in Competitive and Elite Bodybuilding. Int J Sports Med 2014; 35: 943-948.
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Weisenthal BM, Beck CA et al. Injury Rate and Patterns Among CrossFit Athletes. The Orthopaedic Journal of Sports Medicine 2014; 2(4): 1-7.
Tendinopathy TOP TEN By Jill Cook PhD
Tendon pain and dysfunction are the presenting clinical features of tendinopathy. Research has investigated many treatment options, but consistent, positive, clinical outcomes remain elusive. We know that treatment should be active (eg, exercise-based), and that a consistent and ongoing investment in rehabilitation is required. It is important to maximise this investment by understanding (and conveying to patients) treatments that do not help. The following 10 points high- light treatment approaches to avoid as they do not improve lower limb tendinopathy.
1. Don’t rest completely.
Rest decreases the load tolerance of tendon, and complete rest decreases tendon stiffness within 2 weeks.1 It also decreases strength and power in the muscle attached to the tendon and the function of the kinetic chain,2 and likely changes the motor cortex, leaving the person less able to tolerate load at multiple levels. Treatment should initially reduce painful, high tendon load (point 2) and intro- duce beneficial loads (eg, isometrics3). Once pain is low and stable (consistent on a loading test each day), load can be increased slowly to improve the capacity of the tendon.4
2. Don’t prescribe incorrect exercise.
Understanding load is essential for correct exercise prescription. High tendon load occurs when it is used like a spring, such as in jumping, changing direction and sprinting.5 Tendon springs must be loaded quickly to be effective, so slow exercises even with weights are not high tendon load and can be used early in rehabilitation. However, exercising at a longer muscle tendon length can compress the tendon at its insertion.6 This adds substantial load and should be avoided, even slowly, early in rehabilitation.
3. Don’t rely on passive treatments.
Passive treatments are not helpful in the long term as they promote the patient as a passive recipient of care and do not increase the load tolerance of tendon.Treatments like electrotherapy and ice temporarily ameliorate pain only for it to return when the tendon is loaded.7
4. Avoid injection therapies.
Injections of substances into a tendon have been shown to be no more effective than placebo in good clinical trials.8 Clinicians who support injection therapies incorrectly suggest they will return a pathological tendon to normal. There is little need to intervene in the pathology as
there is evidence that the tendonadapts to the pathology and has plenty of tendon tissue capable of tolerating high load.9 Injections may change pain in the short term as they may affect the nerves, but should only be considered if the tendon has not responded to a good exercise-based programme.
5. Don’t ignore tendon pain. Pain usually increases 24 hours afterexcess tendon load. An increase in pain of 2 or more (out of 10) on a daily loading test should initiate a reduction in the aspects of training that are overloading the tendon (point 2). The overload is likely to be due to excessive spring-like movements such as jumping, running and changing direction.
6. Don’t stretch the tendon.
Aside from the load on a tendon in sport, there are compressive loads on the bone-tendon junction when it is at its longest length. Stretching only serves to add compressive loads that are detrimental to the tendon.10
7. Don’t use friction massage.
A painful tendon is overloaded and irritated (reactive tendon pathology). Massaging or frictioning the tendon can increase pain and will not help pathology.7 An effect on local nerves may reduce pain in the short term only for it to return with high tendon loads.
8. Don’t use tendon images for diagnosis, prognosis or as an outcome measure.
Abnormal tendon images (ultrasound and MRI) in isolation do not support a diagnosis of tendon pain as asymptom- atic pathology is prevalent. There are also no aspects of imaging, such as vascu- larity and ‘tears’, that allow a clinician to determine outcome.11 Pathology on imaging is usually very stable and does not change with treatment and reductionin pain, so images are not a good outcome measure.12
9. Don’t be worried about rupture.
Pain is protective as it causes unloading of a tendon. In fact most people who rupture a tendon have never had pain and do not present clinically, despite the tendon having substantial pathology.13
10. Don’t rush rehabilitation.
Tendon needs time to build its strength and capacity. So does the muscle, the kinetic chain and the brain. Although this can be a substantial time (3 months or more), the long-term outcomes are good if the correct rehabilitation is completed.14
The above 10 treatment approaches take valuable resources and focus away from the best treatment for tendon pain—exer- cise-based rehabilitation. A progressive programme that starts with a muscle strength programme and then progresses through to more spring-like exercises and including endurance aspects will load the tendon correctly and give the best long- term results.
So we all know that feeling that we get after exercise – we feel generally happier, less stressed, less anxious and also sleep better. Exercise produces a rush of happy hormones we also know as endorphins. So what are these endorphins and why do they make us feel happy?
Endorphins are chemicals that are produced in our brains in response to stress or pain. Running, doing a hard workout, playing a sport or any exercise at all that increases our bodies stress response has the ability to make our brains release endorphins. The endorphins have the ability to travel through our neural networks as a neurotransmitter. One thing we do know about endorphins is that they make us feel really good. So how does this work then?
A part of the brain called the hypothalamus sends a signal to increase endorphin uptake through our bodies neural network when we subject ourselves to certain activities like exercise, sex, eat certain foods or experience pain. The endorphins then attach themselves to specific receptor sites within our neural network – these are called opioid receptors. These special receptors have the ability to block out pain signals and also to increase that euphoric happy feeling we get after we exercise. It is the same receptors that are locked onto when we take pain relief in the form of opiates.
Once we achieve a positive result in something we do, either though through exercise or simple activities like sticking to a plan you’ve made, your brain will also release another happy hormone called dopamine. Dopamine is responsible for us feeling addicted to pleasure seeking behaviors. By setting regular and achievable exercise goals that you reach it is highly possible to make exercise the trigger for your brain to release dopamine.
Serotonin is another one of our brains happy hormones that act as a natural anti-depressant. When we exercise serotonin levels in our brain increase and so does your level of happiness.
I know all these terms may seem confusing but there is another very important happy hormone called oxytocin. Oxytocin is released when we feel loved, cared for and connected to others. Your brain will also release oxytocin when you are kind to others.
So no matter how hard it may seem to get yourself moving on some days, putting one foot in front of the other and pushing yourself to move and exercise is not only good for your muscles and joints but also stimulates your brain. You’ll produce your very own happy hormones, reduces your stress levels and have you wanting to repeat it all over again next time. Give your fellow team mates, friends and family an encouraging kind words regularly as well- it will not only help them feel happy but will increase your happiness as well.