Running blog series: Part 8: Recovery:
Working as a Physiotherapist I get to see first-hand, the implications of poor recovery. The amount of runners who develop a cumulative injury due to the build-up of micro-trauma that they didn't allow the chance to repair between sessions.
It is common place for runners to come in and say that “I
run nearly everyday”. Well hopefully this blog series up to now should already
be making you think differently about your training.
Remember it’s not all about running!
So why shouldn't I run so often?
Well I remember reading a blog that was written by the first
female winner of the marathon and she basically said one of the most important
things to prevent injury is to not run more than 3 times per week.
Interestingly she has found this from experience but truthfully I was already
advising this to patients and telling them to cross train on the other days (we
all know the benefits of this by now!).
Why should I do this then?
There is a good reason for this:
A long healing time is required for a tendon to heal due to
poor vascularisation (blood flow) (Nowak & Handyford 2000). Some people
believe just to recover the microtrauma from a run take at least 24 hours on
average to repair. So if you do more than the average distance or heal slower
than average person then you will need 48 hours. By my math this equates to
every other day, which is a maximum of 3-4 times per week.
Now most runners that I see tend to be older and this has a profound effect of recovery.
As we age our articular cartilage becomes thinner & less
elastic, Ligaments are less elastic & rupture at lower levels of force
& blood supply is reduced, which slows recovery times.
Healing was found to be slower with age, this was found with
delayed wound healing in older rats (Soybir et al 2013).
Aging & Disuse contribute to a tendon's loss of
resilience & strength (Nowak & Handyford 2000). And this is where
loading (strength training) is even more important than ever to compensate for the loss of strength.
Other effects include a deterioration of proprioception,
particularly limb position & movement (Proske & Gandevia 2012). So
proprioceptive training is also important.
An interesting fact is, on average, heart rate recovery
declines with aging (Carnethon et al 2013). Obviously the direct effect on
injury is not obvious with this however if you are more fatigued, with more
lactate in your muscle then your technique and form will deteriorate, which in
turn leads to increased injury risk.
Another reason not to over train is illness.
Despite being great for our overall health, exercise causes
decreases in the region of 15-25% in lymphocytes, T cells and B cells, natural
killer cells, and reduces the mucosal secretory functions of the nose and
salivary glands.
This is even more of an implication if you are losing weight
also:
2 weeks of weight loss before a competition can impair
cell-mediated immune function & induce high susceptibility to upper
respiratory tract infections in judo athletes (Shimizu et al 2011).
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