sometime

From a physics or mathematical perspective HR has nothing to do with power. However ss there a possible correlation between HR and Power? I'm sure there is, but then there's also a correlation between HR and wind and rolling resistance. Question is do I need an algorithm to guesstimate the wind resistance and then work on my cycling posture and also predeict the rolling resistance and then I can work on my tyre tread pattern and pressures? It's a prediction and basing your training on a prediction is obviously a personal choice but I always believe in doing things properly or rather not doing them. From their FAQ's - I rest my case: 3. How accurate is it? a. This is not as accurate as a PowerTap and not intended to replace one. Research has shown varying degrees of accuracy based on individuals and types of riding. Accuracy will depend greatly on the individual and type of riding. 4. How does it compare to PowerTap? a. It doesn’t and isn’t intended to. The PowerTap directly measures power through strain gauges on the torque tube, which is a direct measurement of power. PowerCal is an estimated value derived from HR. 5. How, after all these years of saying HR alone is not the best measurement for training, can you now measure power from HR? a. There has always been a correlation between HR and power, it’s just that it varies depending on conditions. We’ve simply designed algorithms which predict power based on HR.

HR (obviously) has nothing to do with calculating power. It is relevant when comparing the same route, under the same conditions, on the same bike e.g. are you able to maintain the same power output at lower HR.

It takes certain fixed assumptions on important things like rolling resistance and wind resistance when doing the calcs so it'll only be truly accurate when real world conditions match their assumptions. But as a rough guide it does have some merit.

Anyone from the general "Parks" suburbs keen to meet up somewhere like Greenside and ride to Modders and back on Sat morning?

4h20 for Cullinan is a long ride so if you're at a similar level for B&B you will "poep" and you will "kuk" but B&B is one of the more forgiving races around so you should finish without too much trouble - you'll just be out there a long time each day. But 10 weeks is plenty of time to get some decent training in which will reduce your **** and give you more time to enjoy the very social side of B&B.

+1 I bought a nice pair of Perl Izumi baggies there.

My point exactly - drop the rock, watch the outcome, run like hell, have a good laugh and you can repeat it many times a day with the desired outcome. Hanging rocks from trees takes time and there's no guarantee of getting the results you want.

Kids don't just happen to have a green (no co-incidence that) rope with them when they're out playing, then take the time and effort to hang a large rock from it and then not hang around to see the "fruits" of their labour. As we all know kids are not good at delayed gratification - they want to watch and enjoy the havoc they cause (and probably record it on their phones). If a bike jacker is going to be bothered with a rock and a rope they would rather swing it at you.

I live in the area and I ride the spruit and walk our dogs there every week. I know very well how aggressive and arrogant many MTBers can be when I'm walking my dogs. On the flip side when I ride my bike there I give walkers and their dogs a very wide berth, ringing my bell to warn them and making a point of greeting them as much as possible (seldom get a positive response mind you). But with a$$holes on both sides this will not be an easy problem to solve. I'm convinced this is not a bike jacking attempt (why go to all that trouble when you can just pull someone off their bike) but rather a premeditated malicious intent to hurt an MTBer.

Great race to watch and a pity Burry couldn't match the others today. Forget the juvenile gloating about wheel sizes, to me the most interesting part of the race was watching a 1.87m rider weighing a little under 80kg AND riding a dual suspension bike, beating 1.74m riders weighing around 65kg, riding hardtails. He must've been pushing out some incredible power outputs. Also what was Schurter thinking not protecting the inside line on that last climb. He should've held the inside line all the way and made Kulhavy take the longer outside line then moved over on him as they approached the next right hander and squeezed him to take the apex first. I suspect Kulhavy would've still had the legs and won it though.

Caerus and others with a similar mindset please answer a question for me: When your car needs a service/upgrade do you buy the parts required from your (cheaper) local spares shop and give them to your garage/mechanic to fit for you?

There's a diiference between saving yourself some money and being so cheap that you'll deny someone else a living. Learn the difference and then appreciate that even as a salaried employee trying to sustainably sell your services for the best price someone is willing to pay, that you are no different to the LBS owner doing thesame thing. Don't be a hypocrite.

I'm using it - difficult to know if it makes a difference or not but at least it's a good alternative to my regular pre-ride breakfasts

Some nice options here http://www.sjscycles.co.uk/brake-levers-other-dept667_pg1/#page=1

Don't get me started on synchronised swimming! If that's in the Olympics then so too should ballet!

Bike ready and first few rides on it under the belt. All in package of entry/tent/food/beer paid for. Sport's Pass from SWAMBO signed, stamped and certified at Parkview Police Station - we're good to go!

Speaking of subjectivity and wasting time; instead of speaking to the content of the post, your post spoke to your intrepretation of its purpose and justification.

I still regret selling my Colnago Altain with Columbus Brain tubing. Beautiful chrome lugs, chainstay and fork and a deep purple colour (Wordperfect sponsor's colour apparently). I think I need to call the guy I sold it to and see that happened to it. I think about it everytime I get back from a long ride on my roadbike (which isn't often mind you) with my whole body still vibrating from that very harsh Scott aluminium frame. Sorry for the hijack Cogs!

Mine's shiny and 1 out of 3 is a pass mark in South Africa - please Sir can I join you?

That could've ended really badly - lucky you spotted that when you did!

That's called rubbing CSA's noses in it - well done Cherise!

I agree it is a nice little route - I've done it 4 times this year and my wife rode it yesterday. I don't understand why they don't promote it more here.

Any see the Korean weightlifter dislocate his elbow last night? Pretty gruesome stuff http://www.dailymail.co.uk/news/article-2182414/South-Korean-weightlifter-takes-gold-worst-Olympics-injury-elbow-snaps-lifting-357lbs.html http://l.yimg.com/os/en/blogs/sptusolyexperts/292824-south-korean-weightlifter-jaehyouk-sa.jpg

I ran a 38 with an 11:36 on a 26er. Depending on the terrain I would spin out with the 38:11 so you may find yourself running out of gears on a 34 but the 1:1 climbing ratio should probably more than offset the few times you need longer gearing than the 34:11.

Black worker Stolen MTB Ride into the guy Taken by force Wow - that's some choice of words!