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Jun
28
comment Is it worth it to get a bike computer with cadence?
What was it about the Cateye Micro that it gave excellent cadence, and how do all current cadence measurements fall short of that? For what purposes does one need Cateye-level cadence accuracy that one cannot achieve with other levels of accuracy?
Jun
27
comment Allen Coggan power profile table for Cyclo cross riders?
Closer to an all-rounder but there's a slight difference depending on the type of cyclocross you race on. Generally speaking, European cyclocross runs are a little longer, North American cyclocross runs are a shorter and steeper. Also, it appears Coggan is de-emphasizing power profiles and is switching to FRC profiles.
Jun
16
comment Is it worth separating your vo2 max wattage's on the flat and hill climbs in order to provide clearer goals during training?
I'm guessing you're referring to Coggan's Power Profiling Chart. Coggan has always disliked that particular use of his chart and has been de-emphasizing the Power Profile in favor of his (newer) fucntional reserve capacity.
Jun
14
comment Giant Revolt 2 vs Giant Anyroad 2 drag/roll resistance
Blam, he can't know why until he knows whether the issue is truly rolling resistance or aero resistance. Measurement will tell him that.
Jun
14
comment Giant Revolt 2 vs Giant Anyroad 2 drag/roll resistance
If you truly want to know, you'll have to measure the difference between the two bikes in both rolling resistance and in aerodynamic drag. The most precise way to do that requires having a device that will record your second-by-second speed as was described in this bicycles.stackexchange answer: bicycles.stackexchange.com/questions/9938/…
Jun
13
comment Is it worth separating your vo2 max wattage's on the flat and hill climbs in order to provide clearer goals during training?
BTW, after you've found that peak 5-minute interval you can switch to the Aerolab (or, um, Chung Analysis) tab to verify that the peak interval occurs on the climb.
Jun
13
comment Is it worth separating your vo2 max wattage's on the flat and hill climbs in order to provide clearer goals during training?
Excellent. Thanks for the PF/PV plots. This is very helpful. You can use the "find interval" tool to zoom in on the "peak" 5 minute power for each of those rides (then highlight the peak interval and look at PF/PV again), but I suspect that we already have enough info. For neuromuscular reasons many riders have an easier time generating high pedal force at low crank inertial load, such as usually occurs during a steep hill climb (you can see the difference at around 1 m/s (~60 rpm) and 350 N). If you can supplement with those two plots I may be able to give a fuller answer.
Jun
12
comment Is it worth separating your vo2 max wattage's on the flat and hill climbs in order to provide clearer goals during training?
Before giving an answer, we'd need more information, especially two things: 1) how are you measuring these maximums; and 2) have you looked at your pedal force/pedal speed, especially with gradient of the slope? Depending on your answers, you may not need to "separate" your goals.
May
28
comment Is there a cycling equivalent to Naismith's rule
VAM was coined by the Italian Michele Ferrari (the physician who has been banned for life from cycling for his connection with various doping scandals) and is an abbreviation for the term "velocità ascensionale media" (or mean ascension speed in meters per hour). It is sensitive to slope: at the same power output, the VAM you can produce on a shallow slope is lower than the VAM you can produce on a steep one.
May
26
comment Should I let chronic training load drop (as in stop training) to end my current level of tiredness or continue riding?
The question doesn't give quite enough information to determine whether this is actually health-related or a result of training overload -- that's why I was asking for clarification. If the previous load was light then I agree it's health-related and would think it not in the purview of bicycles.stackexchange. If the load had been ramping up quickly then it could be a training question.
May
25
comment Should I let chronic training load drop (as in stop training) to end my current level of tiredness or continue riding?
What kind of TSS were you carrying into the TT series, were your ATL and CTL changing rapidly, and what was your IF for the TT?
May
18
comment Does Bike or Rider Weight / Groupset affect cruising speed on the flat
Strava power estimates can be off by quite a bit (either high or low) when compared to actual measurements with an on-bike power meter, especially over short intervals. Averages over an entire ride will typically be closer. This could be a good bicycles.stackexchange question.
May
17
comment Trainers: Fluid or Mag
If you incorporate the clarification that a fluid trainer can produce the needed load but at high cadence rather than low, I would upvote your answer.
May
17
comment Trainers: Fluid or Mag
Here's an example: I just hopped on my CycleTek fluid trainer with my Power Tap-equipped bike. The trainer can handle 1000 watts but in my highest gear ratio (52x12) at 60 rpm my wheel speed was only ~31 km/h, and the trainer could only produce about 300 watts of resistance at that wheel speed. I would need a higher gear ratio to produce "high intensity" power at low cadence. The alternative, of course, is not to do this at low cadence. Many fluid trainers can produce adequate load if the wheel speed is high enough. That means high power at high cadence.
May
17
comment Trainers: Fluid or Mag
Right, the issue isn't whether there are trainers (either magnetic or fluid) that can create enough load -- the issue is whether they can create enough load at low rpm. "High intensity" usually means "sprint intervals" which are supra-VO2Max. In a sprint interval on the road your cadence is typically up around 120 rpm or higher and you're using a relatively low gear to accelerate up to speed. On a trainer the roller speed will need to be high, so you'll need to use a higher gear. You'll need an even higher gear still to do this at low rpm.
May
17
comment Trainers: Fluid or Mag
OK, thanks. The short answer is you're going to have a hard time finding a fluid trainer that will provide that kind of load at low rpm (and you won't be able to find a magnetic trainer that can provide that load at all). I'll do the calculations and provide a more complete answer tomorrow -- unless someone else wants to do the calculations and write-up and I'll upvote that.
May
17
comment Trainers: Fluid or Mag
Also, in order to give a good answer to your question, it would be good to know what speed you can maintain when climbing, the slope of that hill, your cadence on that hill, and your total weight. Knowing those things will help to determine whether a fluid (or magnetic) trainer can provide the appropriate load.
May
17
comment Trainers: Fluid or Mag
I haven't looked at the specifics of the TCT high intensity low rpm workout. How high is high intensity, how is it measured, and how low is the rpm?
May
15
comment Does Bike or Rider Weight / Groupset affect cruising speed on the flat
How are your watts being measured? And, the guy who claimed to be able to cruise at 30mph at 250 watts must not be riding a bike like yours -- that would imply very low rolling resistance and a CdA of around .145 m^2, which is lower than most unfaired recumbents and in the range of several faired recumbents.
Apr
23
comment When Mark Cavendish says he's sprints at 1500 watts how long is that for?
Cavendish is listed as 69 kg so it couldn't possibly be 30 seconds -- 1580 watts/69 kg = 23 watts/kg, which is twice what world-class riders specializing in track sprints put out. World-class track sprinters can average 23 watts/kg for 5 seconds, but it's much more common that in informal articles like this people (not just Cavendish) are quoting their one second maximum.