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Found 8 results

  1. Hi, anybody have any experience with the Sigeyi AXO Power meters ? http://www.sigeyi.cn/en/col.jsp?id=113 Thanks
  2. The powermeters used by BORA-hansgrohe and Quick-Step Floors Pro Cycling Teams offer riders lightweight, reliable, and highly-accurate data. 4iiii Innovations Inc. is a Canadian-based global leader in providing innovative wearable technologies to OEM and retail markets. 4iiii brings an integrated portfolio of technology that raises the bar in sport monitoring, enabling athletes to perform smarter, faster and safer. Click here to view the article
  3. Since 2012, 4iiii has gained an enviable reputation for developing leading-edge sports monitoring products. With PRECISION, the company introduced a new level in lightweight powermeters. The 4iiii PRECISION is a left, single-sided powermeter with proprietary 3D technology that measures tri-axial strain in a bicycle crank arm with an accuracy of +/- 1%. PRECISION is the world’s lightest powermeter - weighing just 9 g - in addition to being completely waterproof. PRECISION delivers real-time power output in watts and is both ANT+ and Bluetooth Smart compatible. PRECISION also distinguishes itself with its over-the-air upgrades via both iOS and Android. The 4iiii Podiiiium is the dual-sided, much-anticipated turnkey pairing of the pro's-choice PRECISION Powermeter and Shimano’s lightweight evolution of the FC-R9100. The new Podiiiium PRECISION Powermeter uses the same waterproof and highly accurate technology, with a new slim profile that makes it compatible across a variety of cranks. White-capped 4iiii PRECISION PRO Powermeters distinguish podium-dominating World Tour teams Quick-Step Floors and BORA-hansgrohe at the Tour de France. 4iiii PRECISION incorporates the same technology, but in a affordable single-sided version. The 4iiii Ride Ready option of the PRECISION Powermeters provides the lightest and most cost-effective left-side powermeter on a Shimano Dura-Ace FC-R9100. The 4iiii Viiiiva is the first ANT+ and Bluetooth Smart heart rate monitor to bridge ANT+ devices, while transmitting the data over Bluetooth to display devices. The Viiiiva is 10 times more sensitive and 5 times more responsive than most heart rate monitors and features advanced beat-to-beat measuring technology. It can also store up to 65 hours of activity data without the need for a paired device and offers a handy tap-to-pair feature, removing the need for complicated pairing scenarios. The left-sided PRECISION Ride-Ready Powermeter is available immediately for Shimano 105 5800, Ultegra 6800, Dura Ace 9000, Dura Ace 9100, XT M8000, XTR M9000 and XTR M9020. The dual-sided Podiiiium Powermeters for Shimano R8000 and Dura Ace 9100 will be available in January 2018. 4iiii aims to bring highly accurate power and heart rate data to market at incredibly competitive prices. All products can be purchased online at 4iiii.co.za or at local dealers. Pricing:Viiiiva Heart Rate - R1,100 PRECISION Shimano 105 - R5,600 PRECISION Shimano Ultegra 6800 - R7,000 PRECISION Shimano Dura Ace 9000 - R8,400 PRECISION Shimano Dura Ace 9100 - R8,400 PRECISION Shimano XT M8000 - R7,000 PRECISION Shimano XTR M9000 - R8,400 PRECISION Shimano XTR M9020 - R8,400 For more information visit 4iiii.co.za.
  4. Cycling is a fairly unique sport due to the ability to be able to get a direct measure of workload. Power meters have been around for a few decades already and are able to measure your power output in real time during training and racing. Immediately after the power meters were first released to the consumer market, they were extremely expensive and heavy, use was limited to certain professional cycling teams and others that could afford them. Recent advances in technology have seen power meters become cheaper and as a result their popularity has increased among cyclists of all levels. In this article, we will provide some insight into how we use power meters with our athletes. Click here to view the article
  5. There are really two ways in which your power meter can be used. Setting the training intensity during interval training. Most cyclists who are introduced to power meters fall under the mistaken impression that the most effective use for their power meter is in setting the intensity. However, this might not always be beneficial (which we will highlight below). Collecting data for analysis after your training. Cyclists love data and if we can measure it, we probably will. However, data is only really valuable if it is correctly interpreted. Power output helps cyclists and their coaches monitor training load and, most importantly, progression. Using the power meter to collect data for later analysis is the more effective strategy. Using the power meter to set training intensity: Before the advent of power meters, most elite cyclists used heart rate as a measure of training intensity. Heart rate in a laboratory setting is almost always linearly related to power. i.e. as power output increases, so does heart rate and the rate of increase stays consistent. It was therefore a useful way to set specific training zones based on a laboratory test done at the beginning of the season in a performance laboratory. However, out in the field (on the road or trail) there are many factors that affect the relationship between heart rate and power. These include dehydration, temperature, altitude, fatigue, caffeine intake, stress and body position. Together these factors can change heart rate by up to 25 beats per minute for the same power output. Power meters measure the amount of work done while cycling. Power output, measured in watts, is the product of force and angular velocity. Power is not influenced by environmental conditions, fatigue or any other factors, which makes it a less variable measure of intensity than heart rate or rating of perceived exertion. Does that mean you should only use power to prescribe training intensity? Although power is a very objective and reliable measure of intensity, doing intervals based on power may not be the most effective strategy. A study conducted by Dr Jeroen Swart at the Sports Science Institute of South Africa examined improvements when training by power or heart rate. They took 21 elite male cyclists and trained them using either power or heart rate prescribed interval sessions. Before and after a 4 week training period, the athletes completed a VO2 max and peak power output test as well as a 40km time trial. To ensure that they had all performed exercise at the same intensity, the average training power outputs and heart rates from all the training session for each group were compared. They were identical. When the performance tests were compared, the peak power output tests showed that the heart rate group had improved by over 5% while the power group had improved by only 3.7%. Analysis determined that the heart rate based intervals were 60% more likely to result in improvement than the power based intervals.If both groups trained at the same average intensity, how can that be? Well, another often cited deficiency of heart rate monitors is the lag between the increase in intensity of the exercise and the increase in heart rate. This can often be as long as 30 seconds. As a result, the heart rate group had performed intervals where the initial power outputs were very high in an attempt to get the heart rate up to the target. Later in each interval, the power outputs dropped off significantly, ending up much lower than that of the power group. The power group, as expected, churned along at an even intensity for each interval. The hypothesis is that this initial surge in the heart rate group could have been responsible for the extra training effect of using heart rate. That said, using power to prescribe training intensity can allow the athlete or coach to progressively increase the target intensity and when this is done appropriately, it can force greater improvements in performance. A power meter can keep you honest during your training and prevent you from soft pedalling during your intervals. If you see your power output starting to drop towards the end of your interval, you are more likely to try and put in a little more effort to keep it at the target wattage. At Science to Sport we use both heart rate and power to prescribe training, depending on the specific session. Setting the right intensity requires analysis of the training data to ensure progression and avoid excessive fatigue. Analysis of your training data: Power meters turn your bike into your own mobile testing laboratory The reliability of power output data you record during a training session makes it a great variable to be able to accurately measure and monitor improvements in training status. If you are able to produce more power over the same time interval, then you are responding favourably to your current training load. While speed up your local climb can be a used as a more crude measure of progression, it will be influenced by wind, temperature or trail conditions if you are on a mountain bike. Power meters turn your bike into your own mobile testing laboratory and allows you to perform your very own performance tests every time you repeat a standardised training session.Power meters are great for race analysis too. If you are working with a coach or perform all your analysis yourself, race data may allow you to determine what went wrong during your race. Did you go too hard too early? Did you make too many surges early on in the race that you paid for later? How did you pace yourself during the race? In addition, knowledge of the amount of work done (in kilojoules) during your training can allow you to fine tune your nutrition to ensure that your energy intake is matching your energy expenditure. How do you monitor training load with a power meter? Once you are recording all your training sessions with a power meter, you are able to plot an accurate Performance Management Chart (PMC). There are a number of different applications that enable you to plot a PMC; such as TrainingPeaks, Golden Cheetah and others. The variables plotted on a PMC include your chronic training load (CTL), acute training load (ATL) and training stress balance (TSB). These are defined in the glossary below.The PMC will give you a snapshot of your fitness (CTL) and how fatigued you are likely to be (TSB). How high a CTL to aim for is dependent on many factors such as your training history, age, work related stress and others. A top professional road rider might aim for a CTL of 100-130 while your mid 40’s exec / weekend warrior will be best off with a lower value such as 65 or 70. How can I ensure that my training load is sufficient? Analysing individual session data will be able to assist you in establishing if your current training load is sufficient to produce optimal gains. Analysing training data will allow you to assess progression. Are you managing to produce a higher average power output for the same interval session? If not, why not? Are you training too hard and not recovering? Do you need to train harder? That’s where an expert coach will come in. They have years of experience and often first hand knowledge through their own racing experiences to guide your training appropriately.As coaches we use a number of metrics to monitor external training load (the stress applied to the body), but also use other measures of stress to ensure that we don’t miss anything. An example is the Lambert and Lamberts Submaximal Cycling Test (LSCT). This and other tests allow us to measure the internal load (i.e. how you are responding to the load). In the meantime, avoid becoming obsessed with the numbers and remember to enjoy your riding as well. Glossary: Acute Training Load (ATL) is a 7 day rolling average of your TSS scores. The ATL can be loosely regarded as a measure of fatigue.Chronic Training Load (CTL) is a 42 day rolling average of your TSS scores and provides an objective measure of fitness. Functional Threshold Power (FTP) is the maximal average power output that you can sustain for an hour. This is the value that the PMC uses to judge the intensity and load of any training session. We at Science to Sport establish your FTP from physiological testing we perform in our laboratory, alternatively, a common method of measuring FTP is to do a 20min maximal effort and to multiply the average power of this effort by 0.95. Training Stress Balance (TSB) is the difference between CTL and ATL and provides an indication of ‘freshness’. Negative TSB values indicate that some acute fatigue may be present. Training Stress Score (TSS) is a score assigned to each training session to quantify the stress of the session. Riding at your FTP for one hour will produce a TSS of 100 points. The algorithms built into the PMC will assign an exponentially higher TSS for efforts that are above your FTP. About the author: Science to SportScience to Sport bridges the gap between scientific research and sports men and women in the field.Utilising scientific tools and experience gained through research and practical involvement at the highest professional and scientific level, the experts at science to sport are able to provide athletes with scientifically validated methods and products which they can use to their advantage during training and competition.
  6. I am a software engineer by trade and there for take a very technical approach to most things in my life. I believe if you want to better yourself at something, cycling or loosing weight - what ever it is - you first need to be able to measure your current value before you can start working on it. So i have a Garmin Edge 500 with heart monitor and cadence sensor which has allowed me to train sufficiently so far but now i wish to start working on my power output which means i need a power meter. I have read about the different types of power meters - where they measure and that their results are not exactly the same due to power loss through the drive train ect... But from my perspective being able to measure a value is better than not being able to measure. I dont wish to break the bank, so what are my cheapest options? And what do i need to know?
  7. I'm looking into buying a power meter (again). I'm heavily leaning towards the PowerTap C1 power meter. I love that you can fit it onto your existing crank, and as far as I can tell, it's the cheapest crank spider power meter on the market today. But on the display unit side, the PowerTap Joule GPS+ does not impress me that much. The lack of a manual start stop function is a showstopper for me. I'm leaning towards getting a Garmin Edge 500 or Garmin Edge 510. How well does it work mixing different brands of power meter and display unit? In theory, it should just work as they both use Ant+, but how well does it work in practice. I am worried about hidden gotchas. Anyone have experience with doing this?
  8. I would like to hear what your opinions are regarding power meters for MTB - better on the bike or on an indoor trainer? I want to do the power training "thing" to see what all the hype is all about. I think it is all just phase that everyone is going through, I think next we will probably be using brain power meters to do training on I am thinking of buying a power meter, I like the Powertap MTB Hub. Is it really worth it? And how important is it to have the power meter during a race? Would it be ok to train with the wheel and when you do a race put on your racing wheels? I was just thinking because many people doing Cadence Cycling classes or use Watt Bikes but can't afford power meters for the bicycle, they can't see their power reading during a race. What other decent power meters really work for MTB?
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