Posts tagged ‘ibike’
Dothan Cityfest 2012
Race summary
17th place after missing the winning break of 8. Kenda, Mountain Khakis, UHC-Georgia, Team Coco’s, and Rosetti brought their top crit riders. Frank Travieso (Team Coco’s) won the race from the breakaway by attacking on the last lap and holding on until the end. Emile Abraham (Rosetti) took the sprint from the rest of the break for 2nd with Brendan Cornett (Locos) taking an impressive 3rd to round out the podium after bridging up to the break by himself. Kenda and Mountain Khakis also had riders in the break so they were not chasing. Andy Crater (Cleveland Clinic) tried to bridge across twice late in the race and could not quite close the gap. I tried to go with several early moves thinking that an early break would stick. It seemed that the race was too fast for any breaks to stick. I started sliding backwards after a 20 minute section with a heartrate average of 182 bpm (several beats above threshold) that started 10 minutes into the race. I recovered after a few laps, but unfortunately the winning break went at this point. I tried three different times to bridge across and/or get a chase group started, but the field brought the move back fairly quick each time. Then as the laps ticked down I switched tactics to try and position well for the field sprint and I was happy with how the field sprint played out as it felt a lot like the last couple laps of the Sunny King criterium which is coming up in a couple weeks. I ended up 9th in the field sprint for 17th in the race.
The data
No powertap data for the race, as I had a loose spoke on my rear powertap wheel and switched to my light climbing wheels (2006 Bontrager 3X Lite) which are still pretty good for crits b/c they accelerate so easily. Still, I raced with my iBike and merged the iBike data with my Garmin heartrate data to obtain the annotated polar graph shown below. The iBike graph shows where I was drafting pretty clearly.
Annotated heartrate summary (two new yearly heartrate records so far this year – most time in Zone 5 for a race and highest max heartrate of 195bpm)
Heartrate and ibike power plot annotated (click to enlarge)
Annotated ibike data (click to enlarge)
Finally, here are some pics and videos that Kristine got. The picture after the videos is my favorite … looking for the magic entrance into the side of the building
Spring climbing
After yesterday’s long climbs in Huntsville, today was a different style of climbing – numerous short, steep climbs. Check out the iBike gradient graph:
Also, I was inspired while riding through Mountain Brook to post some pictures of the beautiful spring flowers. I didn’t have my camera with me – so I’ll have to post a few of the pics from my parent’s house this past Sunday. Imagine riding past house after house with all different kinds of blooming flowers – particularly azaleas, dogwoods, and bradford pears. It was an interesting contrast to yesterday’s ride in Huntsville, which went through some really rural countryside where instead of the tended flowers, you get wildflowers in the fields and beautiful dogwood trees blooming underneath all the really tall pine and hardwood trees in the woods. Two contrasting climbing rides, two contrasting spring flower explosions, two fun adventures.
redbuds, azaleas, and a couple dogwoods
- redbuds, azaleas, and a couple dogwoods
- josiah, kristine, and analise underneath redbud
- our family underneath redbud in shadow of dogwood
- azalea bowl from grandmas front yard
Climbing to the moon
Annotated ride map (click to enlarge)
It’s spring break this week in Alabama, and so my good friend Lennie and I took our families up to Huntsville to the space and rocket center. While they were enjoying exploring all about space, Lennie and I drove on over to Keel Mountain to explore it and Green Mountain. We ended up climbing Keel Mountain 3 different ways and Green Mountain from both sides. Then I headed back up the front side of Keel one final time. The descents were awesome hitting 55mph+ on four different descents. My favorite of the day was definitely the Green Mountain west side descent which has a horizon drop-off (i.e., where you can’t see over the horizon) at >50mph. Exhilarating. It was REALLY flat though between the mountains, but it was worth it to enjoy time riding with Lennie and to explore 5 new climbs! I’ve posted the iBike data for each of the five different climbs. The last climb up Keel (Blowing Cave Rd) was by far the steepest at 26% max gradient, although the east side of Green Mountain was steeper for longer sustained sections.
Annotated iBike data for the entire ride (click to enlarge)
KEEL MOUNTAIN NORTH SIDE (1st time up)
Dist: 1.61 mi (0:13:31)
Energy: 208.8 kJ
Climbing: 837 ft (Strava CAT 3)
Min Avg Max
Power 0 257.4 527 W
Gravity -22 231.0 509 W
Speed 0.0 7.2 21.9 mi/h
Elev 469 896 1306 ft
Slope -0.3 9.71 16.8 %
Caden 0 62.5 93 rpm
HR 104 150.3 163 bpm
NP:264W IF:0.95 TSS:20 VI:1.03
CdA: 0.342 m^2; Crr: 0.0039
168 lbs; 3/20/2012 11:36 AM
90 degF; 1012 mbar
NOTES: We passed a HOUSE on the climb that was being pulled
up the mountain. They got stuck in one of the switchbacks.
There are two switchbacks on the climb. The descent is crazy
fast - you've just got to remember when to jam on the brakes
before the two switchbacks.
KEEL MOUNTAIN SOUTH SIDE Dist: 1.90 mi (0:15:27) Energy: 217.0 kJ Climbing: 855 ft (Strava CAT 3) Min Avg Max Power 0 234.1 442 W Gravity -275 205.4 419 W Speed 3.6 7.4 19.1 mi/h Elev 479 938 1332 ft Slope -4.4 8.39 22.8 % Caden 34 61.6 98 rpm HR 110 140.3 156 bpm NP:245W IF:0.88 TSS:20 VI:1.05 CdA: 0.342 m^2; Crr: 0.0039 168 lbs; 3/20/2012 12:12 PM 87 degF; 1012 mbar NOTES: This was a pretty steep climb. The 22.8% max gradient was taking a diabolical inside path on one of the switchbacks. This had a lot more twisty sections and was a generally fun climb, but tricky descent. The best part of the descent is at the top as you are coming off the mountain as the descent starts out with a switchback that makes you feel like you are diving off the top of the mountain for a free-fall.
GREEN MOUNTAIN WEST SIDE
Dist: 1.15 mi (0:11:07)
Energy: 169.5 kJ
Climbing: 690 ft (Strava CAT 3)
Min Avg Max
Power 76 254.1 371 W
Gravity 11 232.4 360 W
Speed 4.2 6.3 16.7 mi/h
Elev 462 805 1158 ft
Slope 0.2 11.20 23.9 %
Caden 41 56.1 96 rpm
HR 120 150.8 166 bpm
NP:263W IF:0.95 TSS:17 VI:1.03
CdA: 0.342 m^2; Crr: 0.0039
168 lbs; 3/20/2012 1:19 PM
92 degF; 1012 mbar
NOTES: I've heard that this is one of the toughest
climbs in Huntsville. It was definitely steep with some
sustained 20+% gradients. At the last turn before the top
there was a car that had rolled and looked like it was left
there to warn people of the danger of the descent. It
had police tape all over it with busted out windows. The
descent was amazingly fast but kinda dangerous. The
car that had rolled was in a decreasing radius turn that
almost caught me off. Then you have a really fast section
into a sweeping turn that you can pretty much hit without
brakes leading into the fastest part of the descent. YOU
HAVE TO HIT THE BRAKES HARD LEADING INTO THE LAST LEFT!
I knew it and hit the brakes hard but I still almost didn't
slow down enough.
GREEN MOUNTAIN EAST SIDE Dist: 1.82 mi (0:15:25) Energy: 222.7 kJ Climbing: 829 ft (Strava CAT 3) Min Avg Max Power 0 240.8 358 W Gravity -63 209.2 353 W Speed 3.9 7.1 17.3 mi/h Elev 458 853 1294 ft Slope -1.2 8.88 18.4 % Caden 5 59.8 92 rpm HR 103 148.0 164 bpm NP:253W IF:0.91 TSS:21 VI:1.05 CdA: 0.342 m^2; Crr: 0.0039 168 lbs; 3/20/2012 1:45 PM 87 degF; 1012 mbar NOTES: I had climbed this once before, and it is still really steep. It starts out with cement that has been grated at the bottom to helps cars get traction. Then it eases up a bit and rolls a bit on the way up. This may be one of the coolest descents I've done with the rollers coming at 50+mph so that you have at least one horizon drop-off.
KEEL MOUNTAIN BLOWING CAVE (STEEP!!!)
Dist: 2.19 mi (0:13:30)
Energy: 211.7 kJ
Climbing: 756 ft (Strava CAT 3)
Min Avg Max
Power 89 261.4 431 W
Gravity -462 206.1 461 W
Speed 3.4 9.7 24.8 mi/h
Elev 563 921 1326 ft
Slope -6.9 6.40 26.2 %
Caden 30 63.1 97 rpm
HR 119 156.8 177 bpm
NP:281W IF:1.01 TSS:23 VI:1.07
CdA: 0.342 m^2; Crr: 0.0039
168 lbs; 3/20/2012 2:46 PM
85 degF; 1012 mbar
NOTES: This was by far the steepest climb
with several sections above 20% including one
26.2% section NOT in a switchback. There
is some gravel and dirt sections that are not
too rough but can catch you by surprise on the
descent. Still, you can get some speed on the
super steep sections because they are fairly
straight. Watch the dogs at the top and the bottom
of the climb/descent.
KEEL MOUNTAIN NORTH SIDE (2nd time up)
---------Selection Stats---------
Dist: 1.61 mi (0:12:29)
Energy: 213.6 kJ
Climbing: 820 ft (Strava CAT 3)
Min Avg Max
Power 64 285.2 418 W
Gravity -38 253.2 397 W
Speed 5.4 7.8 23.0 mi/h
Elev 561 976 1382 ft
Slope -0.5 9.82 16.2 %
Caden 51 66.6 98 rpm
HR 131 169.5 179 bpm
NP:288W IF:1.04 TSS:22 VI:1.01
CdA: 0.342 m^2; Crr: 0.0039
168 lbs; 3/20/2012 3:15 PM
84 degF; 1012 mbar
NOTES: I wasn't going for the KOM, but I
was trying to put in a good time on this and ended
up 2nd behind Mark Fisher by almost a minute. That
would be a tough time to beat. Kudos to him!
Keel Mountain – north side – first time up
Keel Mountain – south side
Green Mountain – east side
Green Mountain – west side
Keel Mountain – Blowing Cave Rd
Keel Mountain – north side – 2nd time up
iBike, youBike, weAllBike
iBike graph for my entire ride – annotated from within iBike (click to enlarge)
Happy days are here again as I have remounted my iBike Dash with Power. Props to the good folks at iBike who repaired a broken enclosure bracket on my iBike Dash device and a broken LCD screen on my iBike Gen III device – for free, even though my Gen III was out of warranty. Those of you who know me well (or even partially well), know that I’m pretty much obsessed with topographical maps, bike riding, and analyzing bike ride data — especially climbing related data. The screenshot above is from my commute home from work.
The iBike Dash clearly has the best in-ride graphical user interface of all bike computers/GPS devices — making full use of the color iPhone touch screen (see this post for screenshots – http://toonecycling.wordpress.com/2011/04/21/equipment-update-ibike-dash-power-meter-wheels-and-tires-galore/). But the best two features of the iBike for me are the internal gyrometer for measuring slope and the iBike ride analysis software, which in my opinion, is the best graphing software for displaying power, cadence, elevation, heartrate, and slope all on one screen. The slope is obtained using an internal gyrometer, which is much more accurate than a barometric obtained gradient as the barometer can never catch up with the slope changes in a severely rolling area (such as where I live).
iBike slope graph for a particularly insane section of rollers
On my way into work today, I figured out a topic for my next journal article — developing an algorithm for analyzing ride data from any device, combined with data reported from other devices for the same segments, combined with survey-based and/or radar acquired elevation data to come up with a “best fit” elevation profile. On my way home from work, I was inspired to do a climbing route with some of the steeper climbs on Shades Mountain and Little Valley Mountain including a nearly 30% driveway off of Altaloma. Here is the topocreator map:
Annotated topocreator map of a climbing route home from Samford (click to enlarge)
About the journal article I am going to write, look at the complete iBike stats below, particularly note the “Climbing” amount. The iBike only registers 4000′ of climbing, whereas the Garmin registered nearly 5700′. The zoomed in iBike graph below the stats shows why. Even with a 29% gradient climbing at least 30 feet, the barometric sensor only registered a 2 foot climb for the entire driveway since I turned around and immediately skidded my way back down the driveway across the road and into the grass on the other side (I can’t imagine the wear and tear on the brakes of whoever lives in that house). Even the iBike gyrometer couldn’t turn around fast enough from the extreme climb to the extreme descent with it only registering a 2 or 3% descent even though it should have been -29%. Interestingly, the Garmin registered 30 feet of climbing for the driveway and 25 feet of descending even though I noticed that the % gradient was pegged at +17% the whole way down the driveway. I guess the % display only updates itself at a slower rate than the internal elevation recording.
Dist: 34.55 mi (2:27:57)
Energy: 1631.9 kJ
Cals Burn: 1560.1 kcal
Climbing: 3997 ft
Braking: -270.5 kJ (-16.6%)
Min Avg Max
Power 0 183.8 717 W
Aero 0 102.7 2471 W
Rolling 0 25.6 101 W
Gravity -3620 -11.0 548 W
Speed 0.0 14.0 56.3 mi/h
Wind 0.0 15.3 49.0 mi/h
Elev 188 477 851 ft
Slope -20.2 -0.24 29.2 %
Caden 0 73.9 118 rpm
HR 66 123.1 164 bpm
NP:216W IF:0.72 TSS:128 VI:1.18
CdA: 0.342 m^2; Crr: 0.0055
168 lbs; 2/10/2012 11:28 AM
56 degF; 1013 mbar
Zoomed in S Cove Dr descent (56mph) plus Altaloma driveway climb (29%) – click to enlarge. Demonstrates fundamental problem with barometric pressure sensors for altitude measurements in constantly changing terrain.
Altaloma driveway climb
Altaloma driveway climb
Renfroe climb – S Cove descent – Altaloma driveway climb (click to enlarge)
Schlitz Park Criterium – Tour of America’s Dairyland – Day 6
Strava map highlighting one lap of the race.
This has to be one of my all-time favorite criterium courses, although I would not want to race it in the rain. Fortunately for us in the pro men’s field, we dodged the thunderstorms and raced on a completely dry course. This was not the case for races earlier in the day, including the pro women’s field (see pics in the gallery below). The race starts on Pleasant St at river level (Milwaukee River). The first turn takes you onto Brewer Hill where you climb all 68 ft that course gains in one shot. Then after a flat section across the top, you dive down through a series of twists and turns to make it back down to Pleasant St for the finishing sprint. In the middle of the race, I was thinking how beautiful it was to be following a single file line of riders through so many turns at speeds approaching 35mph on the downhill series of turns lap after lap. This was the most technical course of the entire series, and there were no wrecks!
Here is how the race played out – a small break established itself within the first few laps of the race. They stayed away for the entire race, but never lapped the field. Towards the middle of the race, I tried to get into a chase group. This lasted for a lap. Then with 5 laps to go, another move went off the front of the field. I saw it but hesitated. Then I decided to jump anyway and rode the rest of that lap and part of the next one solo trying to chase back onto the chase group. It was all for naught though, because the field caught me and eventually reeled back in the chase group with 3 laps to go. I had burned a lot of matches with that move, but I still really wanted a top 20 result so I fought hard to move up on the last two laps and ended up 19th.
iBike stats – a couple interesting things highlighted in red. The interesting thing about the braking is how little there was of it. You really didn’t have to brake that much anywhere on the course because everybody was so smooth!
6/21/2011 6:10 PM
Dist: 37.37 mi (1:30:12)
Energy: 1608.7 kJ
Cals Burn: 1537.9 kcal
Climbing: 3468 ft
Braking: -24.5 kJ (-1.5%)
Avg Max
Power 297.2 1125 W
Speed 24.9 36 mi/h
Wind 19.1 36 mi/h
Caden 77.0 118 rpm
HR 158.3 177 bpm
iBike graph – note the entire lap solo with 5 to go … not a very good way to save energy for the finish …
And here are my Strava lap splits … with a link to the interactive strava data here – http://app.strava.com/rides/786672
DIST ELEV SPEED POWER HR TIME
Lap 1 0.7 mi 68 ft 23.1 mph 268 watts 151 bpm 0:01:55
Lap 2 0.7 mi 68 ft 25.1 mph 348 watts 160 bpm 0:01:46
Lap 3 0.7 mi 68 ft 25.5 mph 342 watts 161 bpm 0:01:44
Lap 4 0.8 mi 68 ft 25.1 mph 352 watts 161 bpm 0:01:46
Lap 5 0.7 mi 68 ft 25.3 mph 351 watts 163 bpm 0:01:45
Lap 6 0.7 mi 68 ft 24.8 mph 318 watts 159 bpm 0:01:47
Lap 7 0.7 mi 68 ft 26.3 mph 351 watts 161 bpm 0:01:41
Lap 8 0.7 mi 68 ft 26.8 mph 370 watts 166 bpm 0:01:39
Lap 9 0.7 mi 68 ft 24.8 mph 293 watts 159 bpm 0:01:47
Lap 10 0.7 mi 68 ft 24.4 mph 306 watts 154 bpm 0:01:49
Lap 11 0.7 mi 68 ft 25.8 mph 331 watts 156 bpm 0:01:43
Lap 12 0.8 mi 68 ft 24.4 mph 349 watts 158 bpm 0:01:49
Lap 13 0.7 mi 68 ft 25.8 mph 341 watts 162 bpm 0:01:43
Lap 14 0.7 mi 68 ft 23.9 mph 296 watts 157 bpm 0:01:51
Lap 15 0.7 mi 68 ft 24.8 mph 323 watts 156 bpm 0:01:47
Lap 16 0.7 mi 68 ft 25.3 mph 347 watts 157 bpm 0:01:45
Lap 17 0.7 mi 68 ft 26.3 mph 349 watts 158 bpm 0:01:41
Lap 18 0.7 mi 68 ft 25.5 mph 350 watts 158 bpm 0:01:44
Lap 19 0.7 mi 68 ft 24.8 mph 319 watts 158 bpm 0:01:47
Lap 20 0.7 mi 68 ft 25.8 mph 351 watts 159 bpm 0:01:43
Lap 21 0.7 mi 68 ft 25.3 mph 368 watts 159 bpm 0:01:45
Lap 22 0.7 mi 68 ft 26.6 mph 381 watts 162 bpm 0:01:40
Lap 23 0.7 mi 68 ft 25.8 mph 372 watts 165 bpm 0:01:43
Lap 24 0.7 mi 68 ft 22.5 mph 287 watts 156 bpm 0:01:58
Lap 25 0.7 mi 68 ft 24.8 mph 310 watts 161 bpm 0:01:47
Lap 26 0.7 mi 68 ft 23.9 mph 335 watts 159 bpm 0:01:51
Lap 27 0.8 mi 68 ft 24.6 mph 358 watts 156 bpm 0:01:48
Lap 28 0.7 mi 68 ft 25.5 mph 353 watts 159 bpm 0:01:44
Lap 29 0.7 mi 68 ft 25.8 mph 365 watts 159 bpm 0:01:43
Lap 30 0.7 mi 68 ft 24.6 mph 340 watts 157 bpm 0:01:48
Lap 31 0.7 mi 68 ft 26.6 mph 391 watts 161 bpm 0:01:40
Lap 32 0.7 mi 68 ft 24.1 mph 317 watts 158 bpm 0:01:50
Lap 33 0.8 mi 68 ft 25.1 mph 368 watts 159 bpm 0:01:46
Lap 34 0.7 mi 68 ft 23.5 mph 302 watts 155 bpm 0:01:53
Lap 35 0.7 mi 68 ft 23.7 mph 300 watts 153 bpm 0:01:52
Lap 36 0.7 mi 68 ft 23.5 mph 302 watts 153 bpm 0:01:53
Lap 37 0.7 mi 68 ft 24.8 mph 340 watts 155 bpm 0:01:47
Lap 38 0.7 mi 68 ft 25.1 mph 352 watts 156 bpm 0:01:46
Lap 39 0.8 mi 68 ft 24.6 mph 330 watts 153 bpm 0:01:48
Lap 40 0.7 mi 68 ft 24.8 mph 328 watts 152 bpm 0:01:47
Lap 41 0.7 mi 68 ft 26.3 mph 362 watts 159 bpm 0:01:41
Lap 42 0.7 mi 68 ft 23.5 mph 322 watts 154 bpm 0:01:53
Lap 43 0.7 mi 68 ft 25.1 mph 334 watts 155 bpm 0:01:46
Lap 44 0.7 mi 68 ft 21.8 mph 257 watts 151 bpm 0:02:02
Lap 45 0.7 mi 68 ft 22.5 mph 258 watts 153 bpm 0:01:58
Lap 46 0.7 mi 68 ft 25.3 mph 352 watts 164 bpm 0:01:45
Lap 47 0.7 mi 68 ft 24.4 mph 353 watts 165 bpm 0:01:49
Lap 48 0.7 mi 68 ft 27.4 mph 397 watts 163 bpm 0:01:37
Lap 49 0.7 mi 68 ft 25.1 mph 382 watts 161 bpm 0:01:46
Lap 50 0.7 mi 68 ft 25.3 mph 339 watts 162 bpm 0:01:45
Lap 51 0.7 mi 68 ft 28.0 mph 439 watts 168 bpm 0:01:35
Finally, here is a gallery of pics from the day. Hover over each one for a caption.
Analise and Josiah look for the magic entrance into the side of a building while scootering in the parking lot
Numerous climbs – click to enlarge and count the changes in gradient from up to down and then post in the comments how many “hills” there are. I don’t have time to count but I would guess 100-200 hills instead of maybe 20-30 hills yesterday?
















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