I'm A Radiator...So Are You

It was warm and sunny, last Sunday morning, as we began our eight-mile jaunt.  By the time Charley, Teri, Suzanne and I reached our bottle stash at two miles I knew the middle four miles were going to be, er, interesting.  As we approached the turn-around point, Teri mentioned something about the heat and asked where the (moving) “air” was.  Fortunately we realized the reason for the “warmer” conditions had to do with the fact we were walking with a breeze to our back.  Immediately we began to feel, perhaps not more comfortable, but at least a little less-overheated.

We’re not running at a fast pace this time of the year, so I have more time (and oxygen going to my brain) to think about things, especially when people pass by on their run/walk/bike.

‘Why is it,’ I asked to no one in particular, ‘I see a whole lot of cyclists training for an upcoming triathlon with empty bottle cages on their bikes; why there are no water bottles in those cages?’

Perhaps they are a special breed of triathlete; they are part camel and don’t need water.

Perhaps they have never had a flat tire or a mechanical situation they could not fix on their own, so they didn’t have to wait for bike support, or worse, have to walk their bike for a long distance.

Or, perhaps it’s simple ignorance.

I’m a radiator.  And if you’re human so are you.  And when that cooling system fails, we can, too.  A 160-pound person participating in a high-intensity sport can have their ability to perform (power) limited by almost 50 percent by a four-pound decrease in body weight.  That same 160-pound athlete, if they’re participating in an endurance event, can see a 5-percent decrease in running efficiency with the same amount of fluid loss.  Take another pound or two of body weight away and that drop in running efficiency goes up to 30 percent, depending on the event distance; the longer the distance means a greater decrease in efficiency

And that same 160-pounder, should they lose 8 or 9 pounds of fluid, can find their normal endurance to do a low-intensity activity, such as walking or easy cycling, cut in half.

I can speak from hard experience that hydration, especially in the summer, is important.  A near-fainting episode during an aerobics class two decades ago proved to me just how a “small” fluid loss can lead to a big problem.  I never thought until that time about how much I did sweat during workouts.  But I’m reminded every time I spin, run on a treadmill, or hit the cardio machine at my gym.  That puddle was originally inside of me, part of my blood which was sent to the capillaries near my skin. 

Unlike our automobiles we don’t have a sealed cooling system.  Our sweat glands, nostrils, mouth and (to a degree) our genitourinary system leak like the proverbial colander.  Sweating decreases blood volume, which means our blood cells have less fluid through which to travel and becomes more thick.  And even if we’re not noticeably sweating on colder days we still lose fluid by exhaling water vapor.

So we need to put fluid back in to replace what is lost. 

I recently mentioned that exercise activity (workouts) of lower intensity, or less than an hour in duration, can be served by plain (cool) water as tolerated during the activity.  Don’t forget about post-workout replenishment by the 150 percent of body weight change (loss) during the exercise period guide.  Don’t feel like taking it all in immediately?  No problem.  Just make certain to drink over the next few hours as tolerated. 

Workouts which go beyond 60 minutes need not only rehydration, but replacement of carbohydrates, protein and electrolytes which are being used.  Every person is an experiment of one; every person has a favorite sports beverage for their long workout.  My recommendation is to find the beverage which best suits your palate, your gut, and your wallet, in that order; the best sports drink in the world for you is the one which ends up in your gut and not in your sports bottle.  The beverage manufacturers know this, also; one particular sports drink, until about two decades ago, tasted more (to this writer’s palate) like powdered drink mixed with seawater.  At that point they developed several different flavor combinations (including iced tea, which I loved) and adjusted the level of salts and sugars in the formula.  (Add a marketing campaign with a dominant basketball player, and the rest, as you say…)

While you might not necessarily think you need to rehydrate on the run it’s always better – as people like to say – to have it and not need it, rather than need it and not have it.  Be prepared.

Take A Few Days And Call Me In The Morning

I wrote last week about a case of Delayed Onset Muscle Soreness (DOMS), what I jokingly referred to as "God's Way Of Saying You Should Have Kept Walking," at least in my case. For a solid week I was mystified, mortified, stupified - and in the case of my quadriceps muscles - petrified and nearly-ossified. There's nothing like the frightening feeling of having those big leg muscles fire off, leaving your legs to wobble in unexpected ways, especially when you're walking down the halls of your office building on a Thursday afternoon. It could have been sympathy pains for all of those marathoners I watched a couple of weeks ago, but I'm not certain.

When it comes to physical activity after a race, I've tried to follow a few rules of thumb which I picked up over time with my athletes:

1. A day of light activity (translate this as "no running") or rest for every hour of racing. I've traditionally taken a day off, or run very gently, the day after racing a 5K or 10K, and recommended the same to my own athletes.

2. A day of easy running for every mile raced. An athlete running a 5K or 10K would be constrained from hard interval workouts or tempo running for three-to-six days. In our case here, track workouts usually have been two or more days out from a race, or easy in intensity.

Marathons and half-marathons usually do a different kind of damage to the average (citizen) athlete; there's a lot of eccentric muscle activity over an extended period of time. Many coaches and training plans recommend easy running in the days following to keep the large leg muscles from becoming too damaged. The problem is that those easy runs, especially in the first week, do little but delay the recovery process, as defined by decreased muscle volume contraction, decreased running efficiency and increase in blood chemical markers related to muscle damage. Groups of runners who rested in the days following a marathon performance were found to have greater muscle strength and decreased soreness.

So, if there's that compulsion to get out and do something in the days after a long race, let it be something at the perceived intensity level of four on a one-to-ten scale...or less. Odds are good that's going to be a walk, but that's okay. You'll be back to running - and excited - in about five or six days.

God's way of saying "Take two and call Me in the morning..." It certainly beats hobbling.

Ask the Coach - April 8, 2008

Summer is almost here and it's going to be hot. All of us know to drink more fluids and avoid running in the heat of the day. How should the heat effect our mix of intervals and long runs?

I don't presume every runner knows to drink more fluids; more importantly than this, what fluids to drink. While your kidneys are good at controlling the amount of electrolytes passed in urine, your sweat glands are going to push out electrolytes as well as fluid as part of thermoregulation. This means plain water will do you fine while you're at the workplace, if you have a job where most of your day is spent at the desk. However, plain water can be a little, er, boring to the palate; you're not going to drink what doesn't suit your taste. Sports drinks, such as Gatorade, Powerade, Propel, and so on, are good at making certain you have sufficient hydration; the down side of these drinks are that they have a great deal of high fructose corn syrup, a cheap sweetener, and not so much in sodium, potassium, chloride and other electrolytes, which are the things you need most to be replacing.

Oh, contrary to popular belief, the carbohydrates in most beer are countered by the toxicity of the ethanol. Your liver has to work to process the alcohol and remove it from your system before it can assimilate any carbs. Since alcohol can only be passed through the system by urination, sweat or respiration, like that of caffeine, you'll lose more fluid by drinking alcohol or caffeinated beverages (iced tea, iced coffee, energy drinks) than you would sugary drinks, which take longer to pass through the gut.

You can run during the daytime, but understand that the fluid you lose through cooling your body (sweat) is taken from your blood circulating through your capillaries; that's why you'll see folks looking quite red on a hot day when they've been active. The water loss from your blood as part of the cooling process makes the blood thicker and more difficult for the heart to pump through the circulatory system. Think of it like trying to suck honey through a thin straw, compared to sucking water through the same; it's much harder. Since the blood flows slower through the vessels, it takes more pumps of the heart to move it the same distance it would travel with full fluid volume...oh, did I mention the fact your blood is going to the areas of the body needed most at exercise? That means your leg muscles are probably getting the most blood sent to it, next to the brain. That's a long way to go.

So, hotter and more humid conditions of summertime running mean your perceived effort at a particular pace is going to increase. That's bad news. The good news is there aren't many "important" summer races here. The best thing you can do is continue to run through the year, listen to what your body is telling you, and adjust your effort accordingly. As for track workouts and long runs, I suggest finding a sports drink that replaces the minerals and electrolytes you lose through sweat, and keeping a bottle or two available. You can stash bottles on a long run or get your favorite drink at the local convenience store if carrying a bottle is too much of a problem. If those don't work, then adjust your workout times to take advantage of conditions, or run at places where there are water fountains.Swimming or biking may be a good way to get some exercise this summer since it will be so hot. What's the best mix of swimming, biking and running?

Swimming and bicycling are great cross-training, I like them a great deal because of the reduced impact to the musculoskeletal system. The best blend of cross-training activities depends on your fitness level and amount of time you have available to ride or swim. Borrowing the old phrase "the main thing is to keep the main thing the main thing," there is a limited degree of transfer between swimming, bicycling and running; you need to run if you want to be a good runner. If you bicycle, make certain you wear a CPSC or ANSI-approved bicycle helmet, follow *all* the rules of the road, and (please!) refrain from wearing headphones *in your ears* (there are devices that will allow you to listen to music in your helmet AND hear surrounding traffic).I may want to run a marathon this fall. Is it too early to start training this summer?

Good for you. A marathon will teach you a great deal about yourself; your perceived limitations, strengths and weaknesses. Training for a marathon, especially a first marathon, takes at least 18, and up to 26 weeks, depending on fitness level and goal. If your plan is to do LaSalle Bank Chicago Marathon, around the first week of October, this would be the time to begin marathon training. Before you mention heat as an obstacle, let me remind you of a painfully obvious fact: Chicago in the first week of October can range in temperature from the high 80s (last year) to the high 30s (about five years ago). You never know what conditions are going to be like on the day. There are good training plans available, several of which have been used by ECRT athletes to run personal best times and qualify for Boston. The biggest challenge is not so much choosing a training plan, but to follow it through and make certain you toe the line on the day as healthy as possible. A personal note: Running a marathon while injured is not a good idea.