Are you a pronator or supinator? It is the question that Osimert 80mg (Osimertinib) many seek to answer when they start running although, in reality, the question is not entirely correct because all runners pronate and supinate at a certain time in the gait cycle.
The first thing you need to know, before defining one way or another, is that the runner's stride is made up of four phases called 'rocker'. First is the initial support phase or rocker I (10% of the gait cycle), which is when the heel contacts the ground. This is followed by the complete support phase or rocker II (20%), the moment in which the entire sole of the foot contacts the ground, and this is where pronator runners are differentiated from supinator runners.
At this time the runner may pronate the forefoot slightly relative to the heel, which would be normal. Or it could also pronate excessively, subjecting the plantar fascia to excessive tension, causing the usual injuries such as plantar fasciitis or heel spurs to appear. Or, on the contrary, pronate very discreetly to the point of almost supinating the forefoot with respect to the rearfoot. In the latter case, the take-off force provided by the big toe is partially or totally lost, and therefore the power to advance and jump, causing injuries to appear on the side of the foot.
After supporting, it's time to take off
The third phase would be take-off, or rocker III (30%), in which the foot rests exclusively on the heads of the metatarsals and prepares for the next gait cycle. And the last would be the swing phase (40%), in which the foot remains in the air until the next support cycle.
Numerous causes can cause an alteration in the normal gait cycle, thereby causing the appearance of painful pathologies at the foot level. Of all of them, the most frequent is the shortening of the calcaneo-achilles-plantar system (SCAP) or, what is the same, an increased tightness of the muscles of the back of the leg, easily evident through a clinical examination in expert hands. .
To avoid them, controlled stretching of these muscles is beneficial. Likewise, the use of shoes customized for this purpose will help prevent and relieve symptoms, whether you are a pronator or supinator. That being said, get rid of labels and run!