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6

Mountain bikers regularly run these low cadences for very short periods, often at much higher power output. The issue as to causing damage to knees is more about the duration of the climb and how strong your stabiliser muscles are. (Too much time mushing causes chronic overuse problems, while weak stabiliser muscles can allow injury to happen), however they ...


6

Aside from pacing better, if your cadence drops to 40rpm for too long and you are in your lowest gear at maximal effort for the expected duration, then you could probably use at least a gear 2/3rds or less than you currently have so you are likely to be able to sustain closer to 60rpm. That's possibly not feasible on your bike, but perhaps a 29 rear cog at ...


5

The short and most direct answer to your question is to use your power meter to pace your ride optimally and Alex Simmons, who has given another answer to your question, was too modest to mention that he is an expert in this and has developed one of the most sophisticated power pacing models for variable conditions. A longer answer is, to paraphrase Prof. ...


4

I have actually used both 2 different sized solar panels and a lithium backup battery on Ragbrai. Whether any of these will work for you depends on: How many days long is your ride? How sunny will it be and how much time will you have to do a solar charge? How many devices you need to charge. For solar charging. The first lesson is you can not charge ...


4

The raw pedal force or torque data are difficult to work with but you can extract some information from them. First, note that Stages mounts the strain gages (or gauges) permanently to the crank, so the crank length is constant and they know what it is; that means that there is a one-to-one relationship between the kgf and torque columns. In this case, it ...


3

Bad data, no question whatsoever. Muscle fatigue develops quite rapidly, but even so there is minimal decrease in power for at least a handful of seconds. (Indeed, even the fitted curve you've shown seems to be in error, likely as a result of the way GC's fitting algorithm will chase "noise".)


3

TL;DR Your output should be consistent regardless of what type of terrain you're riding on, but external factors coupled can skew the results. I've trained with power for many years, and while my evidence to the following points is purely empirical, maybe it will help you. In my experience, I've always achieved higher W/kg results on hills than riding ...


3

The short answer to your question is, "yes, weight does affect cruising speed on the flat, but not by much." The longer answer to your question is a special case of one of the answers given to this bicycles.stackexchange question: "How can one estimate drag for a bicycle?" There you can find the equation for power given speed, disaggregated into the ...


3

Check out GoalZero, they make a bunch of portable solar products. While it's a little bit pricy they are quality products that will last. My buddy uses one when we are gone racing and have no access to electricity, and it works quite well for phones and other small electronics. I have also seen, but don't really know much about, people putting these on ...


3

At the time of this posting, the solar chargers out there aren't very robust, unless money isn't a factor. If you're going to be camping each night, try the biolite camp stove. I haven't found anything that can charge my iPhone faster and it's relatively cheap, much cheaper than a good solar charger. ...


3

You might consider working on your cadence range; if you are able to spin up to 120-130 RPM, you will have a larger range and won't need to shift as often. One-legged drills and pure cadence drills can work well for this.


3

Remember, very few road racers are giving it hell from a standing start. The vast majority of the time they are traveling at a fairly high rate of speed as they approach the end of the race (With the lead out for the sprint, positioning, etc), so the need to jump multiple gears is very limited. Other times where quick acceleration is needed is to jump a gap ...


2

You've got a rack and panniers, so I suppose you're on a commuter bike. It shouldn't surprise you that you cruise at 30mph (which is already quite fast). You would probably get far faster if you improved aerodynamics, e.g. on a road bike with narrow tyres and drops or TT bars. You wouldn't spend so much energy into ripping a gigantic hole into the air. ...


2

From my observation of your vid, the peak power is while you are accelerating, not while cruising. I note that you produce ~700 W at times. I am assuming that you are using power measuring pedals / cranks. For comparison, when I was a Physics student we did stair runs up 15 floors to measure our power output; I and a couple of other fit people produced over ...


2

The short answer to your question is, no, you don't have to separate your "VO2Max power" between flat rides and climbs. However, specificity matters and the pedal force/pedal speed plots show that the demands of flat rides and steep climbs differ, so you may want to keep that, plus your recovery capacity in mind when you train. The longer answer requires ...


2

Putting aside the crank fitting problems, you can forget about using data from a Stages power meter for reliable neuromuscular (very short duration) power assessment. It's simply not suitable for that task (not many power meters are).


2

Understand that the concern is not generally things like a muscle or tendon tear that can occur with, eg, extreme weightlifting -- off-road bikers might be susceptible to that sort of injury, but not a road biker. Rather, the concern is the injury that may be done to joint surfaces and structures due to repeated force, above some "tolerable" level, applied ...


2

Your options to reduce the force on your knees are to reduce bike + rider weight or get lower gearing. If you have a standard road bike cassette, there are climbing cassettes that will reduce the gearing slightly (around 10% or so). Is it dangerous to your knees? Well, that depends on your personal physiology, how much force you are pushing, how much to you ...


1

Motor pacing simulates the speed/character of travelling in a big peloton in a race quite well: at times pedalling hard to keep up, alternated by periods of free-wheeling while in the draft on a downhill (say). Always moving at a high speed, fast cadence. To achieve the same on a group ride, the riders should all be quite evenly matched, ideally with some ...


1

Not a modern 105 - Claris cranksets are octalink, 105 cranksets are hollowtech.


1

Low cadences are generally putting a lot more strain on the knees, as you're relying on power, given the gear ratios I suspect another issue. I would work on your fitness on flatter terrain and build up to hills. Start within your cardio range and stay in it, do this regularly 3-4 times per week if possible. The problem stems from fitness/strength which ...


1

Negative force/torque power !+ actively resisting the pedal. Thus, no conclusions about pedaling "style" (even for the left leg, which is all that Stages measures) can be drawn from data such as these.


1

I agree both are measuring torque/force. That is the ratio you would get with 170 mm cranks. 1 kgf = 9.80665 newtons. 7.3 * 9.80665 * 170 / 1000 = 12.2. But without pedal angle I agree you cannot calculate work or power (wattage). And this appears to be just one pedal. stagespower-tech-specs P=2∗((Fave∗9.8∗L)∗(R∗.1047)) From there, the rest ...


1

There are various cycling power calculators out there that can help you with your questions, but the short and simple answer is that the main factor affecting bike top speed on flat ground is aerodynamic drag. http://bikecalculator.com/ Drag varies as the square of velocity, so 40 mph will take nearly double the power of 30 mph. Where weight makes a ...


1

Change gears before you need to You can do this two ways. Change to a higher gear before you stop. Get out of the saddle when you start. You'll accelerate faster and shouldn't need to change gears until your doing 30 kph (20 mph) or so. Or change gears regularly as you start, say every 3 or 4 pedal strokes. 1, 2, 3, change. 1, 2, 3, change.


1

To weigh in my experience, I did the US Southern Tier last summer and did not need solar chargers. I did consider them, though. My requirements were to keep my Nexus4 on 24x7, while GPS tracking my route. This is a pretty power intensive application, and I was able to do it by just buying a big 15,000mAh backup battery and charging it whenever I had access ...


1

There are lots of different field tests approaches. I've been using the Carmichael one (two 9-minute full out TTs with a cooldown between them).



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