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Search: Posts Made By: RChung
Showing results 1 to 50 of 1000
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Forum: Fifty Plus (50+)
09-17-24, 01:21 AM
Replies: 8
Views: 364
Posted By RChung

Yep. This is a common part of what many in my...

Yep. This is a common part of what many in my field (and what my wife) does.

OTOH, the black-white mortality crossover at older ages appears to be real. That's pretty interesting, too.
Forum: Training & Nutrition
09-14-24, 01:29 PM
Replies: 47
Views: 1,876
Posted By RChung

Yup. I try not to forget that the people we ride...

Yup. I try not to forget that the people we ride with aren't randomly chosen, so it's probably wise not to use your ranking among your friends as evidence that what you're doing is right -- or even...
Forum: Training & Nutrition
09-14-24, 08:38 AM
Replies: 47
Views: 1,876
Posted By RChung

Congratulations on being fast. I can't out-sprint...

Congratulations on being fast. I can't out-sprint everyone in my group but I can out-sprint almost all of them, and I've never spent time in a gym lifting weights. I've never really thought much...
Forum: Advocacy & Safety
09-11-24, 02:15 PM
Replies: 8
Views: 314
Posted By RChung

Cycling is an indicator of traffic safety for all users

Here's a link to an open-access journal article that compares several small and medium sized US cities for overall traffic safety (drivers, cyclists, and pedestrians). The authors claim that cycling...
Forum: Training & Nutrition
09-09-24, 08:36 AM
Replies: 47
Views: 1,876
Posted By RChung

I'll just say the following two things: The...

I'll just say the following two things:

The goal of competitive cycling is to get to the finish line ahead of the next guy.
The goal of competitive weight-lifting is not to finish your lifts...
Forum: Fifty Plus (50+)
09-06-24, 08:16 AM
Replies: 63
Views: 7,934
Posted By RChung

If you can handle the intensity (and it appears...

If you can handle the intensity (and it appears you can), you should continue what you're doing: looks like it's working for you, and HIIT can be time efficient. Recently, I was looking at some data...
Forum: Fifty Plus (50+)
09-05-24, 07:28 AM
Replies: 63
Views: 7,934
Posted By RChung

Yes, this is a pretty common approach: you...

Yes, this is a pretty common approach: you transform the data in some functional way (often by something that looks like a cumulative or integral), then smooth it (by fitting it to something), then...
Forum: Fifty Plus (50+)
09-04-24, 04:30 PM
Replies: 63
Views: 7,934
Posted By RChung

That's my guess, too. Because I do...

That's my guess, too.


Because I do statistical modeling, I sometimes face-palm when I see people trying to identify inflections. Often it seems like wishful thinking.
Forum: Fifty Plus (50+)
09-03-24, 04:49 PM
Replies: 63
Views: 7,934
Posted By RChung

If the Moloch is somewhere in the top eighth of a...

If the Moloch is somewhere in the top eighth of a million on Zwift I'm screwed.


Yep. Since the introduction of cheap(er) power meters, cyclists can mostly just use power rather than having to...
Forum: Road Cycling
09-03-24, 08:35 AM
Replies: 22
Views: 802
Posted By RChung

Yeah. This wasn't a very good test. But it got...

Yeah. This wasn't a very good test. But it got views, which is the point.
Forum: Road Cycling
09-02-24, 11:10 PM
Replies: 22
Views: 802
Posted By RChung

Oh dear. We used to do drivetrain efficiency...

Oh dear.

We used to do drivetrain efficiency tests with a SRM at the crank and a Power Tap at the read hub.
Forum: Road Cycling
09-02-24, 10:58 PM
Replies: 54
Views: 2,079
Posted By RChung

Hmmm. One of the first tests I did when trying to...

Hmmm. One of the first tests I did when trying to estimate aero drag was to see whether I could distinguish between riding on the hoods vs. in the drops. I could.
Forum: Living Car Free
09-02-24, 09:36 AM
Replies: 53
Views: 5,826
Posted By RChung

[Edited] Non-paywalled version: ...

[Edited] Non-paywalled version:
https://www.nytimes.com/2024/08/26/nyregion/street-wars-bike-lanes-paris.html?unlocked_article_code=1.H04.S7BT.nglw_yeAlxBl&smid=url-share
Forum: Fifty Plus (50+)
09-01-24, 07:43 PM
Replies: 138
Views: 10,441
Posted By RChung

I don't usually bother to look but because y'all...

I don't usually bother to look but because y'all seem interested, I dug up my placement in another sprint segment. It appears I'm ranked in the top 125,000, so there are only an eighth of a million...
Forum: Fifty Plus (50+)
08-31-24, 06:18 PM
Replies: 138
Views: 10,441
Posted By RChung

I don't usually check how far away from a KOM I...

I don't usually check how far away from a KOM I am but today on Zwift I busted my gut for a sprint and checked the Strava Leaderboards. Damn. I just barely missed breaking into the top 3000.
Forum: Fifty Plus (50+)
08-31-24, 08:59 AM
Replies: 63
Views: 7,934
Posted By RChung

I think VO2Max is a proxy for "cardiorespiratory...

I think VO2Max is a proxy for "cardiorespiratory fitness," and VO2Max per se is one of several markers for CRF. In addition, although VO2Max responds well to intensity, all of these markers are...
Forum: Training & Nutrition
08-30-24, 11:42 AM
Replies: 6
Views: 372
Posted By RChung

Hmmm. It looks like the study didn't ask the...

Hmmm. It looks like the study didn't ask the wives/girlfriends (or boyfriends. I don't judge).
Forum: Introductions
08-25-24, 01:35 PM
Replies: 4
Views: 258
Posted By RChung

What part of France is traffic free?

What part of France is traffic free?
Forum: Fatbikes
08-12-24, 09:36 AM
Replies: 12
Views: 2,116
Posted By RChung

If you had fun and you're satisfied with the...

If you had fun and you're satisfied with the result then that's fine.

I agree that your test is a data point, and that your approach requires many repeated rides. If you vary speed and power, you...
Forum: Training & Nutrition
08-08-24, 07:19 PM
Replies: 14
Views: 663
Posted By RChung

OK, so I can more easily see why you're puzzled....

OK, so I can more easily see why you're puzzled. The elapsed time is almost the same, the average power is almost the same, your RPE was similar, but the time in HR zones are very very different. For...
Forum: Training & Nutrition
08-08-24, 10:21 AM
Replies: 14
Views: 663
Posted By RChung

RPE is fine, but Strava's Relative Effort isn't...

RPE is fine, but Strava's Relative Effort isn't *that* nutty. It's basically Bannister's TRIMP, which was the inspiration for Coggan's development of TSS. If you have power data, many people use TSS;...
Forum: Training & Nutrition
08-08-24, 06:22 AM
Replies: 14
Views: 663
Posted By RChung

You're saying the (7%, 75%, 18%) had RE=93? Or...

You're saying the (7%, 75%, 18%) had RE=93? Or did you switch the ordering?
Forum: Road Cycling
08-07-24, 11:42 PM
Replies: 62
Views: 2,572
Posted By RChung

Dan Empfield designed the first tri-specific...

Dan Empfield designed the first tri-specific bike. Since, in the original triathlons, there was no drafting, he was basically designing a bike frame around a position that would work well with...
Forum: Road Cycling
08-07-24, 11:27 PM
Replies: 62
Views: 2,572
Posted By RChung

Yes.

Yes.
Forum: Training & Nutrition
08-07-24, 11:22 PM
Replies: 14
Views: 663
Posted By RChung

What were your average HR for those two rides?

What were your average HR for those two rides?
Forum: Living Car Free
08-07-24, 08:39 AM
Replies: 53
Views: 5,826
Posted By RChung

It's not everyone's cup of tea and if it's not...

It's not everyone's cup of tea and if it's not yours, that's perfectly okay.


Tens of thousands of people ride bikes around Paris each day. As I may have mentioned, although my wife uses her bike...
Forum: General Cycling Discussion
08-06-24, 07:09 PM
Replies: 31
Views: 1,350
Posted By RChung

Depends on how critical the result is: if you're...

Depends on how critical the result is: if you're noodling around by yourself, it's not that critical. If you're racing, it can be pretty damn critical. If you're racing Paris-Roubaix, the cobbles are...
Forum: Living Car Free
08-03-24, 03:43 PM
Replies: 53
Views: 5,826
Posted By RChung

Thanks. Those report injuries and fatalities, but...

Thanks. Those report injuries and fatalities, but they don't report whether those fatalities were between a car and a pedestrian, or a bike and a pedestrian, or a car and a bike. I've looked at the...
Forum: Living Car Free
08-02-24, 06:40 PM
Replies: 53
Views: 5,826
Posted By RChung

Thanks. Can you provide a link to the actual...

Thanks. Can you provide a link to the actual study rather than an article about the study?
Forum: Living Car Free
08-02-24, 11:47 AM
Replies: 53
Views: 5,826
Posted By RChung

That report is from 10 May 2020. I ride...

That report is from 10 May 2020.


I ride my road bike in Paris. I think the risk has declined over the last several years as the number of bikes has increased, the speed limit has decreased, and...
Forum: Road Cycling
07-31-24, 03:34 PM
Replies: 55
Views: 2,557
Posted By RChung

For 5 minutes? No. You do need speed to be...

For 5 minutes? No. You do need speed to be accurate, but you don't need that much precision. At least, the way I do it. Same with power data.
Forum: Europe
07-31-24, 11:05 AM
Replies: 7
Views: 554
Posted By RChung

When I first started riding in Paris, you could...

When I first started riding in Paris, you could spot the Americans cuz we were the only ones wearing helmets.
Forum: Europe
07-31-24, 07:32 AM
Replies: 7
Views: 554
Posted By RChung

If you have Strava Premium, you can see a heatmap...

If you have Strava Premium, you can see a heatmap of cycling routes (not just in Paris, in Brooklyn too). Have you ever seen the short film "C'etait un rendezvous"? It was filmed from the front...
Forum: Road Cycling
07-30-24, 02:52 PM
Replies: 46
Views: 3,474
Posted By RChung

Best value? Probably a used aero bike that's a...

Best value? Probably a used aero bike that's a couple of years old, probably w/o an integrated cockpit and with rim rather than disc brakes. The difference in aero performance is going to be small...
Forum: Europe
07-30-24, 08:08 AM
Replies: 7
Views: 554
Posted By RChung

That's mostly the ring around city on the...

That's mostly the ring around city on the "Marechaux," the main boulevards that parallel the freeway "peripherique." The Marechaux are generally not like the West Side Greenway or Lake Shore Drive:...
Forum: Road Cycling
07-26-24, 06:12 PM
Replies: 92
Views: 2,639
Posted By RChung

Yup. Weird, and disquieting.

Yup. Weird, and disquieting.
Forum: Road Cycling
07-26-24, 02:18 PM
Replies: 92
Views: 2,639
Posted By RChung

Yes, that was a weird interaction.

Yes, that was a weird interaction.
Forum: Training & Nutrition
07-24-24, 04:48 PM
Replies: 48
Views: 3,940
Posted By RChung

https://cimg8.ibsrv.net/gimg/bikeforums.net-vbulle...

https://cimg8.ibsrv.net/gimg/bikeforums.net-vbulletin/672x672/coyle3_bb2205c0e21ac05939e73ceb4076e49aa32e2426.png
Forum: Training & Nutrition
07-24-24, 10:39 AM
Replies: 48
Views: 3,940
Posted By RChung

Here's the classic Coyle paper on elite cyclists....

Here's the classic Coyle paper on elite cyclists. Notice that the correlation between 40K time and watts is strong, but the correlation between 40K time and VO2Max isn't. The correlation between 40K...
Forum: Training & Nutrition
07-24-24, 09:34 AM
Replies: 48
Views: 3,940
Posted By RChung

BTW, this isn't the point of this particular...

BTW, this isn't the point of this particular thread, but VO2Max isn't the greatest predictor of performance, either.
Forum: Indoor & Stationary Cycling Forum
07-22-24, 02:18 PM
Replies: 20
Views: 1,456
Posted By RChung

Yikes. That's a good reason.

Yikes. That's a good reason.
Forum: Indoor & Stationary Cycling Forum
07-22-24, 09:14 AM
Replies: 20
Views: 1,456
Posted By RChung

Why?

Why?
Forum: Training & Nutrition
07-21-24, 08:35 AM
Replies: 44
Views: 2,629
Posted By RChung

You know, I mostly stand by my comment above, but...

You know, I mostly stand by my comment above, but I just revisited your original post because I thought of something else: is your HR monitor working properly? I once got some screwy HR readings over...
Forum: Training & Nutrition
07-20-24, 03:48 PM
Replies: 17
Views: 964
Posted By RChung

Full English breakfast, on the way.

Full English breakfast, on the way.
Forum: Road Cycling
07-19-24, 01:58 PM
Replies: 62
Views: 2,572
Posted By RChung

Most TT and triathlon courses are not terribly...

Most TT and triathlon courses are not terribly steep or technical, and they don't often have 180 degree hairpins. An exception is this weekend's finishing stage of the Tour, the ITT from Monaco to...
Forum: Road Cycling
07-19-24, 01:38 PM
Replies: 62
Views: 2,572
Posted By RChung

Umm, not exactly. TT bikes usually are designed...

Umm, not exactly. TT bikes usually are designed to meet UCI regs, tri bikes don't need to be. Tri bikes can have different, and sometimes bizarre, frame configurations with different aspect ratios....
Forum: Road Cycling
07-19-24, 08:45 AM
Replies: 62
Views: 2,572
Posted By RChung

I don't think it necessarily necessitates it, but...

I don't think it necessarily necessitates it, but I think the issue isn't "closed hip angle" as much as "thigh-chest clearance." You're being rotated around the BB and most riders are thinking more...
Forum: Road Cycling
07-19-24, 08:13 AM
Replies: 62
Views: 2,572
Posted By RChung

It's not just the weight of the aero bars (and...

It's not just the weight of the aero bars (and the stuff you hang off one). In addition, TT or tri bikes typically have a steeper seat tube angle: that's because they're "rotating" you clockwise...
Forum: Road Cycling
07-18-24, 09:38 PM
Replies: 62
Views: 2,572
Posted By RChung

I disagree. A properly fit TT bike can be quite...

I disagree. A properly fit TT bike can be quite comfortable--it's not always, but it can be. That's why they're used on RAAM, and in full IMs where you have to run a marathon afterward. I broke my...
Forum: Fifty Plus (50+)
07-17-24, 02:39 PM
Replies: 39
Views: 2,434
Posted By RChung

Glad you're on the mend. Sometimes physical...

Glad you're on the mend.

Sometimes physical injuries heal quicker than emotional psychological injuries. I had a pretty severe injury at 62 or 63 and I couldn't even think of riding for 3...
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