So as previously mentioned there shall be a new experiment beginning tomorrow (I like to use myself as a guinea pig). The general goal is to get down to my racing weight.
What is racing weight?
Racing weight tends to be a lot leaner than your day to day body weight. For those with sports goals, or wanting to become a sports endurance performer, you will have to flit between a racing weight and an off peak weight. The difference being that your racing weight is less as your body fat percentage is less therefore resulting in faster, more efficient performance times. Your off peak weight is a little higher with a more maintainable body fat percentage during gentler training periods outside of specific sports seasons.
How did I predict my optimal weight?
A bit of math basically! A few calculations here and there, figuring which performance percentile I was is and where I wanted to be to improve my speed. All of which can be done very easily if you know what your current body fat percentage is and what your lean muscle mass are.
An important consideration is, that first of all where you lie body fat wise to begin with and what sport it is that you are looking to enhance your performance in.
Here are some general guidelines of endurance sports and optimal body fat percentages:
Cycling: Male – 6-11%
Female – 12-16 %
Rowing: Male - <8%
Female – 12-16%
Running: Male – 7.3%
Female – 12.4%
Swimming: Male - 10-12%
Female – 19-21%
Triathlete: Male – 6-10%
Female – 12-16%
Please remember that these figures are for peak performers and don’t go on any crazy missions to get your body fat ridiculously low!
Starting Statistics
Gender: Female
Age: 21
Height: 5ft 6 inches
Weight: 62.2 KG (9 stone 11.2 lbs)
Total Body Fat Percentage: 23%
Fat Mass: 2 stone 2 lbs
Muscle Mass: 7 stone 2.4 lbs
Hydration: 57.3 %
Bone Mass: 5.2 lbs
Metabolic Age: 13
Visceral Fat Rating: 1
BMI: 22.1
At the moment, I’m, currently in the 45th percentile with my body fat, meaning that my body fat percentage is lower than 45% of women my age. Being competitive with myself that’s not good enough and I’m always looking for ways to test how I can push my body performance wise.
So hereth is whereth the experiment comes in. I will attempt to get my body fat down to around 18-19% which will place me in the 70-75th percentile area and will hopefully make me nice and speedy!
Goal 1: To get my body weight down to 130 lbs this should result in a body fat percentage of around 19%
With a decrease in body fat, it is predicted that for every 5-10 pounds lost, you remove between 31 seconds and a minute off your total 5K time.
Goal 2: To see whether my “optimal body weight” will improve my current 3 mile personal best of 21 minutes 37 seconds to around 21 minutes.
The Plan
So I hear you all ask, how will you get your body fat down, just drop weight? Sadly it’s not quite that easy and will require a lot of effort on my behalf to get my portions and nutrition exact.
As a rule of thumb, I will need to lose a pound a week (however I may gain muscle so this does come into account).
In order to do so, I will need a calorie deficit of about 500 calories a day. As my current calorie requirement is 2532 per day, I will need to consume around 2000 calories.
Again it is all a numbers game, being an endurance athlete I need to consume adequate amounts of carbohydrate to fuel workouts. For this I will go on the principle that 20% of my calories will come from fat, 17% from protein and 63% from carbohydrate.
So the question is, does it work?! Let’s wait and see!!
Fingers crossed for a half marathon time of around 1 hour 40 –50 minutes when I’m done.