Polar s810 can measure your heartbeat intervals. The differences in these periods reflect your autonomic nervous system when it regulates your heartbeat. This measurement is most useful at rest or at low intensities, because we are talking about very small differences (msecs.) Your relaxation rate indicates the state of your physical recovery. If you are overtrained, it might very well be reflected on the Polar s810 monitor.

Read the article about Polar s810 and heart rate variability

Comments (6)

If you are considering buying a new road bike for the coming season, this period is the perfect time to get excited: Most bike manufacturers present their 2007 collections now.

One of them is Trek Bikes, who has a website with pictures and details about their road bikes, mountain bikes and other bikes for 2007. Their top model among road bikes are Madone SSL 6.9 which is a carbon frame equipped with full Shimano Dura Ace.

I’ll do my best to keep you informed about all the new gear for season 2007.

Manufacturers are welcome to send press releases about their bikes, equipment or accessories for the coming season. If a manufacturer is interested in having Cycling Training Tips to make a review of their product, please have a look in the ‘About’ section for contact info. Press releases can be sent to admin@training4cyclists.com

Comments

Your body position and the bike’s aerodynamics play a big role in time trials. A couple a years ago I read a comparing of different body positions and what influence it had on the finishing time in a 40k time trial. I am not sure, but I think I saw these results back in 1997, so this is not breaking news, rather nostalgic news.

Aerodynamics is important in time trials
An interesting question is how much time you can save by using expensive aero wheels, an aero frame or saving some pounds? There are probably more precise answers to these questions than this report calculates for you, but it gives you an idea of what difference these changes can give you.

One of the interesting findings is that slower riders will benefit more from a lighter bike than top riders will, while aero wheels and frames will give the biggest advantage to faster riders. This is probably because the aerodynamic drag requires a relative larger percentile of the workload at high speeds.

Optimized aerodynamics is better than weight savings
The conclusion for this report is that the biggest changes in aerodynamic drag and in cycling performance come from changes in body position. A more aerodynamic body position can improve your 40k time trial by over 6 minutes (that is really something!) The report also concludes that improving the bike’s aerodynamics is more important than weight savings. A pair of aero wheels can reduce you 40k time trial time with 1 or 2 minutes.

Read the report about cycling aerodynamics

Comments (1)

Carbon cycling shoes look better than traditional cycling shoes made of plastic. But the question is, do they perform better or are they only more expensive? Well, I found a scientific study that tested the stiffness, which is a very important detail when I decide which cycling shoes to wear. Comfort and weight are also important factors, especially comfort. It is though important to remember that shoes with the best comfort often lack stiffness. It is very difficult, if not impossible, to achieve a high degree of stiffness and comfort at the same time.

Carbon cycling shoes are stiffer
In the study shoe stiffness measurements were collected under controlled conditions in the laboratory with a dynamic hydraulic tensile testing machine. Measurements of plantar pressure were done using a special sensor in the soles while subjects pedalled at a controlled power output. The results from these tests showed that the carbon cycling shoes produced a significant, 18% higher peak plantar pressure than plastic cycling shoes. So carbon cycling shoes are stiffer and that is also what riders tell me when they have switched to this more expensive foot wear.

Comments (4)

It is very difficult to train the hamstrings and hip flexors on a regular bike. Basically we use most of our efforts to push the pedals down and never to pull the pedals up. Power Crank offers a different way to train for a better upstroke pedalling power. The pedal arms on the crank work independently of each other, which forces you to work much harder in the upstroke pedalling phase. Now you are forced to make an active upstroke to keep pedalling. That should make you stronger and more efficient. I can not recommend the Power Crank yet, because I have never tried it and neither have the riders I work with. But hopefully I will try it in the future.

Better than one leg riding
I have tried to ride my bike with only one pedal clicked in, but I don’t think that works very well. It does not feel like cycling and it is difficult to maintain a reasonable speed. Therefore I am quite interested in experiences made with the Power Crank system. So if you have tried it, please let me know about it. Otherwise, we will have to wait until I have tried it and made a review of the Power Crank.

Official Power Crank Website - incl. videos
Power Crank blog
Pezcyclingnews.com - Review and pictures

Comments (2)

Shimano and Trek Bikes are about to present a new interesting city bike. Portland.org has got some interesting spy pictures of this new bike. The Jonathan Maus on Portland.org received the spy pictures from a friend, who visited a show for dealers.
This new group is supposed to revolutionize city bikes and appeal to a whole new group of […]

Comments