OK, I'll bore you with this tonight, but I'd like to bore you with it now, because it's important in Austin to know how to run hills properly. It is important to realize that I am a big geek, and when I'm running, I'm thinking through all this stuff, and how best to try to explain it. So... here ya go.
Running Uphill
It helps to think about the physics of hill running, and first it comes down to geometry. Think about the geometry of your body in relation to the ground when you lean back - you've got a triangle formed by the ground: the imaginary line from the top of your head intersecting the ground at a 90 degree angle (side A); the line from there to your front foot (side B), and the line from that point back to the top of your head, which is the triangle's hypotenuse.
Now, think also about the vector of gravity's pull... on a hill, it's not perpendicular to the ground, right? It's straight to the center of the earth (let's stick with Newtonian physics and ignore more recent modifications of it). Hence the suckiness or coolness of running up, or down, a hill.
Ideally, you maintain the same upright, hips under you form as you do when you're on flat ground. Of course, your ability to do that depends on the steepness of the hill.
So, once a hill hits a certain level of steepness, the geometry of our bodies makes it impractical to stay perpendicular to the ground. So, we increase forward lean. This makes Side A, in front of our bodies (top of the head, perpendicular to the ground) shorter, and lengthens the hypotenuse, which is from the top of your head to the foot pushing through the strike behind you. Because of the way our legs bend, and because of the way we're best able to exert force for maximum traction and power, the lean forward makes sense.
The big problem is that most people get their lean by bending at the waist. First of all, as we've talked about on flat ground, this angle between the hips and leg is biomechanically inefficient.
Next, the butt starts falling out behind you, changing your center of gravity, and distorting the geometry of your body.
Once that happens, people tend to hunker their shoulders, which is often also a result of people dropping their heads down.
The result - an inefficient, tiring, difficult-to-breathe running posture. No bueno.
The answer is in your hips, shoulders, and head. Keep your head up - be looking at the next point on the hill that you're aiming for. Keep your shoulders relaxed, but back, allowing a good, unobstructed flow of air. Finally, keep your hips under you. On steeper hills, it helps me to imagine pressing the hips forward into the hill.
Move your arms. Their relation to the body will change on hills - they'll be moving a bit more in front of your shoulders, but still not crossing the front of your body. When your legs are failing a bit, focus on moving the arms, and the legs will follow.
A lot of people strike with the foot and lift straight up. On hills in particular, they're missing out on a huge bit of strength, just in your foot and calves. So, strike, and roll all the way so that when you're taking off, it's off the front tip of your shoes.
Finally, break the hill into manageable chunks. Find a landmark, and just focus on getting to it, then pick another and get to it. If you look up Wilke or some of the other hills we'll be running, you'll try to find a tree and a bit of rope to hang yourself.
Running Downhill
The general rule is that uphills and headwinds are harder than downhills and tailwinds are easy. But make no mistake, downhills run properly and patiently can give you a good deal of time back. They can also wreck your legs in a longer race.
On the downhills, the temptation is to lean back and let gravity carry you. This is actually not good.
Think back to the geometry thing. When you lean back, you feel more in control because the hypotenuse is intersecting the ground at an angle that matches the vector of gravity's pull. The problem is, it also stretches that hypotenuse out - your body has to get longer in front of you. To accomplish this, two things usually happen. First, you lengthen the front part of your stride by stretching the leg out, straightening the knee out and striking on your heel. Because you're also shortening side A of your triangle (the imaginary back line), and lengthening side B (the bottom), gravity gets to accelerate you a bit longer on each stride, resulting in higher speed and greater impact.
Bottom line - bad for your knees, ankles, hips, spine... hell, everything. It even makes my teeth hurt.
Meanwhile, if you're also trying to move your feet faster over a longer distance (side B), you might actually be working harder and getting your heart rate higher than when you're on flat ground. Also dumb.
The answer is to run downhill with the same form and angle as you run on flat ground, and uphill. When you do it, you're going to feel like you're falling forward. This is why you want strong quadriceps muscles, and a quicker, but not too quick turnover. This is a matter of just getting the right feel running downhill.
I try to get to a point of turnover where I'm still striking midfoot, but immediately rolling forward and through the strike. There's a split second between the initial strike of the foot, and the point at which your shoes and joints compress, and you get the sudden, sharpest moment of impact. That's what you need to minimize. Rolling forward immediately helps dissipate some of that energy.
The cautionary warning here is that on a long, very hilly course, like the Austin Marathon and Half Marathon, slowing yourself too much will wear out your quads and increase the odds of them cramping up later... So, it can be a fine line.
Everyone wants to bank time running downhill. But even if you're being conservative and patient, you're just gonna pick up some speed. Side B of your triangle is going to naturally lengthen a bit when you factor in that you're still falling downhill a little, making each stride, even at the same cadence, cover a little more ground.
More importantly, managing a downhill gives you a chance to recover. In the Austin Marathon and Half Marathon, managing the course is everything, and will make or break your day.
I'm sure I'll think of more, but I think this is enough to make everyone wonder just what the hell I'm talking about...
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment