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From Fellrnr.com, Running tips
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→Ice, Inflammation and Healing
While there is extensive experimental evidence for NSAIDs impairing healing, there are also some studies that show no change with NSAID use, and a few that indicated improved healing. For instance, one study<ref name="LigamentImprovement"/> showed that using an NSAID for 6 days after injury resulted in a 42% increased ligament strength at day 14, though there was no change by day 21. Another study<ref name="LigamentUninjuredImprovement"/> showed that an NSAID did not change ligament healing, but did improve the strength of the uninjured ligaments. However, my reading indicates that the preponderance of evidence shows NSAIDs impair healing.
===Ice, Inflammation and Healing===
If NSAIDs are bad for healing, should we treat with ice? So far I have found no definitive studies, but ice has a difference differenct mechanism of action from NSAIDs. By cooling the tissues, ice temporarily reduces inflammation, thereby flushing the wound. It does not directly impact any of the body's enzymes or other processes. If applied for a longer period of time, ice will produce a periodic increase in blood supply that creates a further flushing effect. I have found that ice can produce dramatic improvements in healing speed. See [[Cryotherapy - Ice for Healing]] for more details.
=NSAIDs and Acute kidney failure=
Kidney failure while running is extremely rare, and seems to require multiple factors to come together. Looking at the [http://en.wikipedia.org/wiki/Comrades_Marathon Comrades Marathon], a 90 Km/56 Mile ultramarathon in South Africa, there have only been 19 cases of kidney failure between 1969 and 1986, it even though thousands of people participate each year<ref name="rhabdo1"/>. The following are considered factors in acute kidney failure related to running.
