How to Read Power to Weight Ratio on
To accomplish the top of Cheyenne Cañon in Colorado Springs in twenty minutes, you lot have to be able to churn out 4 watts of ability for every kilogram of trunk weight. Today, Hamish Bail, a professional person rower, cyclist, and Olympian from New Zealand holds the KOM on Strava for this segment at fourteen:04 set on June 16, 2018. Thanks to his rowing background, Bail is known for his superior ability-to-weight ratio. As for the women, Jill Patterson currently holds the QOM with a time of 17:37.
With both of these times under xx minutes, it'due south no dubiety that both Bond and Patterson tin can boast high ability-to-weight ratios.
What is the Power-to-Weight Ratio?
The power-to-weight ratio (PWR) is the amount of power that tin can be produced in relation to body weight, usually expressed in watts per kilogram. It is also cycling'southward peachy leveler, as a measure that allows a comparison of cyclists' abilities even when the riders vary in size. The higher your ability-to-weight ratio, the faster you will go, thus the measurement is also a bang-up predictor of functioning.
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How to Calculate Your Power-to-Weight Ratio
To determine your PWR, divide your torso weight in pounds by 2.two to convert information technology to kilograms, and then dissever the boilerplate ability from a twenty- or thirty-minute time trial by your weight in kilograms.
- Boilerplate Power / [Body Weight lbs./2.ii] = PWR watts/kg
- Average Power / Trunk Weight kg = PWR watts/kg
PWR isn't a static number, but rather corresponds to a specific fourth dimension bridge. A passenger who averages 6.8 watts/kg for 30 minutes may only be able to sustain 6.iv watts/kg for an hour.
Example: Cyclist A weighs 167 pounds or 76 kg and his 20-infinitesimal TT ability is 275 watts. His PWR for 20 minutes is 3.6 watts/kg.
For comparing, an athlete needs to be able to produce half dozen.eight watts/kg in a xxx-minute pre-race exam in order have a chance at winning the Bout de France. Beginners or Cat 5s range from 2.five to 3.2 watts/kg for men and 2.i to ii.viii watts/kg for women; True cat 3 racers typically range iii.7 to 4.4 watts/kg (men) and 3.two to 3.8 watts/kg (women).
How to Increase Your Power-to-Weight Ratio
The key to getting faster is raising your PWR. Every bit more and more cyclists have power meters these days, it's piece of cake to monitor the number. Merely even if you lot don't track your watts, you lot can still raise your PWR merely like every other cyclist by lowering your trunk weight, raising your average ability output, or both.
For cyclists who carry around more than 10 extra pounds, losing weight and gaining power are equally achievable through good nutrition and focused training. Heavier cyclists have the potential to brand bigger improvements because they can assault both parts of the equation. But it'southward important to state that your body needs fuel to throw down ability, so depriving yourself or developing unhealthy eating habits will non but sabotage your PWR goals, but information technology tin as well set y'all upwards for disordered eating.
That said, equally an example of how modest changes can make a big difference, Cheyenne Cañon averages a 7 percent grade for 5 kilometers. If a 75 kg (165-lb.) passenger with a max sustainable power of 250 watts loses 2.v kg, or nigh v pounds, that would cutting 38 seconds off this rider's time. Improving power output by xx watts without any weight loss cuts 85 seconds. If this rider loses 2.5 kilos and increases power by twenty watts, the comeback jumps to a whopping 2:03.
Elite racers aim to be as strong and equally calorie-free as possible, but this is a delicate balance that can't exist maintained for very long. Virtually experienced cyclists can look to see a 15 per centum variance in PWR during the year. Because information technology'due south far easier to make the ratio go downward than upward, changes greater than xv percent often betoken that you either gained too much weight or decreased your training load as well much during the winter. On the flip side, there are physiological limits to how light you can become while maintaining a high ability output.
If you lot're leaner than you've ever been and your average power output on climbs starts to decline, you've reached the tipping point. Effort gaining two or three pounds, and dorsum off your preparation a little bit. Your power will likely come dorsum up, and from now on, you should consider this your minimum allowable weight. Future gains in PWR will need to come from ameliorate training. Of course, at that place's also the weight of your equipment to consider, because shaving grams from your bike volition finer increase your PWR. That said, it'south best to stay focused on your own health and physiology versus trying to buy your way to an elusive goal or take unhealthy shortcuts equally a longterm solution.
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Source: https://www.bicycling.com/training/a20034951/power-to-weight-ratio/
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