I wanted some adventure into the unknown, well here it is. This requires a big change to my training. I’ve never done any serious speed training before, but now’s the time. Last week I started by speed training by employing the Fartlek (http://www.wikipedia.org/wiki/Fartlek) method on my treadmill. I’ve tried Fartlek training in two different ways. One is to start out at normal pace for a few minutes to warm-up, then run for about 3 minutes at 9.1 MPH (almost a sprint for me), then back to normal pace to rest for a few minutes, then sprint again. I repeat this cycle until I finish 6 miles. The other method I’ve tried is to run again at normal pace, then up my speed to 8.0 MPH (my goal speed for race day) for as long as I can, then back to normal speed to rest, then repeat the cycle as often as I can. I love this type of training. It makes time go much faster when running on the treadmill.
Speed training may not be enough to reach my goal so I’m planning on doing something else to help my speed – loose weight. During chemotherapy last spring I gained about 7 or 8 pounds. There were a few reasons for that. The Prednisone increased my appetite. It also caused my problems with stomach acid and gas to flare up, way up, and eating actually helped with that, so I ate very often. The other cause of my weight gain was comfort foods. My sons like milkshakes. During chemo I would get through the day by looking forward to an evening of making and eating milkshakes with my sons while we watched our favorite TV shows. Fortunately I was running about 40 miles a week, otherwise my weight gain would have been much more.
I’ve read that you can improve your percentage improvement in marathon time is about the same percentage in weight loss. I’m assuming this is roughly true for a half marathon too. I’m at about 175 pounds right now. So I if loose about 15 pounds I could expect about a 9% improvement in my half marathon time. A 9% improvement over my 2007 TC time gets me pretty close to my goal. I have 15 weeks before the race so I need to loose about 1 pound a week. That’s not unreasonable.
I’m not planning on loosing weight just to improve my race time. I’ve wanted to do this for a long time. 160 pounds is a very healthy weight for me. Maintaining a good weight has tremendous health advantages that are obtained in a natural way and without drugs. Before I lost my 30 pounds in 2007 my cholesterol was high and my doctor wanted to put me on drugs to control it. I lost 30 pounds and my cholesterol came down into the normal range without drugs. There are so many health risks associated with being overweight (http://www.cdc.gov/nccdphp/dnpa/obesity/) and one of them is an increase risk in cancer. I don’t need that! So I’m going to use my half marathon time goal as a motivational means for obtaining my weight loss goal. I’m also using this public announcement as a motivational means – I must be crazy!
This will not be easy. Many of you know that loosing weight is not easy. I love food and many of the foods I love are not good for me. However, there are a lot of foods that are healthy and are wonderful for the palate too. For the most part I do have very healthy eating habits. My diet is very high in fiber, I eat a lot of fruits (mostly berries which are the best fruits) and vegetables (probably could do better with veggies), I go with low fat versions of most foods, I avoid foods with refined sugars as much as possible, and get low or no sugar added foods when available. So all I need to do is tweak my diet; mostly cut out those evening milkshakes. I’m not going on any special diet. My plan is to have a well balanced diet and to watch calories. For weight loss the bottom line is calories. To loose weight one has to burn more calories than what one consumes. It’s that simple. However, I’m not going on a strict diet like a 1200 calorie a day diet. I don’t have to with the running I do.
Here’s my plan and how I’ve figured it out. I’ve checked with many websites that have online calculators that calculate calories burned. They don’t all give the same answer, so I’m taking an average. For my weight, age and gender, I burn about 2000 calories a day without running – if I were to lead a sedentary lifestyle. The calculators also show that I burn at least 700 calories for 6 miles of running. So if I run 6 miles a day for 5 days a week I’ll burn 3500 calories per week just running. One pound of fat is equivalent to 3500 calories. So, if I eat 2000 calories a day and run 30 miles a week, I should loose 1 pound a week and reach my weight goal by race day on May 3rd. One way to look at this is that all my weight loss is due to running, not cutting calories. I just need to be careful and not eat extra calories.
Ok, now I’m going to get a bit anal with this plan. To make sure I eat the right amount of calories I’m going to watch my calorie intake very closely. I’ve bought a kitchen scale to weigh all the food that I eat. Weighing food is a lot easier than trying to measure the volume. For example, for breakfast I put my empty bowl on the scale, hit the tare button to zero out the scale, add my cereal, write down the weight, hit the tear button, add my fresh blueberries, hit the tear button, and so on until I have the weights of all my ingredients. It really doesn’t take much effort and it’s kind of fun. Then I’m going to try a trial version of some software from CalorieKing’s website that will help me keep track of calories. Once setup I’ll just enter in the weights and the software will keep track of calories and other nutritional data. If the software works well I’ll buy it. My poor wife, she didn’t know what she was getting into when she married me.
Besides keeping track of my calories I’ll keep track of my daily weight. They say you shouldn’t weigh yourself every day because there are normal fluctuations that occur and a normal but temporary weight increase may be discouraging. However, they weren’t addressing a scientist with this advice. By using curve fitting functions I should be able to average out the normal fluctuations and get a better measurement of weight loss trend with daily measurements than I can get with weekly measurements. Here is my weight over last week:
The solid line is a linear fit to the data and shows that over the week I had a weight gain trend of about a quarter of a pound a day. Kind of alarming! But my guess that besides a daily variation there is also a weekly variation. After a couple of weeks I get a better idea of things. The R2=0.6 is basically an indication of how well the line fits the data. The closer to 1.0 the better the fit. A value of 0.6 is not good correlation and is due to having a lot of variation over the fit period. What this means is that there is not a lot of confidence in the accuracy of quarter of pound weight gain trend. Whew! Eventually I hope that the fitted line extrapolated (extended) out to May 3rd will show that I will eventually get to my goal. I suspect that a linear fit may not be the correct model to use and I may need to go to something like an exponential fit (a curve that starts out steep and the beginning and less steep at the end).
Besides monitoring my weight I’m going to monitor my improvement in running speed each week. In a couple of weeks I’ll be running 13.1 miles for my long run each week. I’ll keep track of my time to finish 13.1 miles and chart that too. Hopefully a fit to that data will show that I will eventually reach my race time goal.
I’m really excited about this. Training for a half marathon will not take nearly as much time as a full marathon and there will be less risk of injury. From my experience I start to run into injury problems when I start running about 16 miles or longer. Keeping my weekly long runs to 13.1 miles will save a lot of time. Not only from running shorter distances, but also shorter recovery time. When I run 16 miles or more, I’m kind of useless for about 2 or 3 hours afterwards, whereas I can do something like mow the yard after a 13.1 mile run. That helps a lot in the wife department. The speed training is a lot of fun and from what I read can actually help reduce injury risk.
Besides monitoring my weight I’m going to monitor my improvement in running speed each week. In a couple of weeks I’ll be running 13.1 miles for my long run each week. I’ll keep track of my time to finish 13.1 miles and chart that too. Hopefully a fit to that data will show that I will eventually reach my race time goal.
I’m really excited about this. Training for a half marathon will not take nearly as much time as a full marathon and there will be less risk of injury. From my experience I start to run into injury problems when I start running about 16 miles or longer. Keeping my weekly long runs to 13.1 miles will save a lot of time. Not only from running shorter distances, but also shorter recovery time. When I run 16 miles or more, I’m kind of useless for about 2 or 3 hours afterwards, whereas I can do something like mow the yard after a 13.1 mile run. That helps a lot in the wife department. The speed training is a lot of fun and from what I read can actually help reduce injury risk.
I can’t believe I’m doing this – posting this kind of detail on the internet. Oh well – I’m on the hook now.
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