No riding today, and no car driving for me. Total driving for our family for the week, about a 1.5 km or one mile, when Em had to go to the supermarket for extra things in the rain.
Found this great site for bikeability of bike routes. If you are into lobbying your local council to improve facilities for riding then this is a great resource.
http://www.travelsmart.gov.au/bikeability/index.htmlCheck out the various checklist that will help you to lobby for improved facilities. I feel like there should be a bit more to read. So here is an article I wrote in the May /June 2006 issue of
HUFF magazine.
Why I Ride My Recumbent
Next time you are out riding and someone asks why do you ride one of those weird looking things? Here are some possible responses.
Numb nuts, limp wrists, going weak at the knees and other problems solved, simply by choosing to ride recumbent.NUMB NUTS
Perhaps there are not many recumbent riding people out there who know of the first problem I will discuss, but it is obviously a topic of much debate judging by the 160,000+ entries Google (17) shows for the topic of genital numbness and cycling.
Genital numbness colloquially known as "numb nuts" is numbness in the genital area believed to be associated with pressure on perineal region due to the design of bicycle seats. There are many new designs that attempt to manage this problem. However interestingly, this doesn't seem to be something that the recumbent riding community report.
This issue was only recently bought to my attention when a mountain biking friend showed me the new saddle he bought that increased penile blood flow by 60%!

Of course my interest was sparked and surprisingly I found research on this topic in relation to recumbents. The Department of Urology, University Medical Centre of Cologne in Germany found that there is a difference in penile blood flow during cycling in an upright versus a reclining position. They concluded;
"The results of the present study demonstrated that there is a deficiency in penile perfusion caused by perineal arterial compression. Cycling in a reclining position - in which no perineal compression was seen - caused no alteration in penile blood flow during exercising. Therefore, we suggest cycling in a reclining position to avoid health hazards - such as penile numbness and hypoxygenation of the corpora cavernosa, which can result in impotency." (2)
Another study of 1,100 male cyclists in Germany found a rate of between 58.3 % to 70.3 % occurrence of genital numbness (12). Similarly, in a survey of 333 female members of a cycling club, 44 percent reported perineal swelling or bruising, 34 percent experienced perineal numbness, 19 percent reported painful and/or bloody urination (12).
There is a wealth of research around the bottom of upright cyclists and some researchers (5) have described problems such as nerve entrapment syndromes presenting as genitalia numbness, being reported in 50-91% of cyclists, followed by erectile dysfunction reported in 13-24%. Others (6) have reported the aptly named Alcock syndrome, a temporary penile insensitivity, due to compression of nerves within lower region of cyclists.
And just to keep your medical dictionary off the shelf, other less common symptoms reported include priapism, penile thrombosis, infertility, hematuria, torsion of spermatic cord, prostatitis, perineal nodular induration and elevated serum PSA (5), perineal folliculitis and furuncles, subcutaneous perineal nodules, pudendal neuropathy, male impotence, traumatic urethritis and a variety of vulva trauma (4).
You may notice that I haven't even mentioned things like skin problems, such as chafing, ischial tuberosity pain, folliculitis, and ulceration which are reported as particularly common (3) and in common with all the above disorders are attributed to seat position, seat construction, and riding position.
LIMP WRISTS
Ulnar neuropathy (inflammation of the ulnar nerve), or handlebar palsy occurs due to shock and vibration that is transmitted directly from the handlebars to the arms and can also occur when the hand and arm are in a fixed position for a long time (10). Its symptoms include tingling, numbness, or pain on the outside or middle of the forearm; this sensation of discomfort may run all the way to the little finger. If ignored, the tingling can rapidly progress to numbness and intense pain sufficient to prevent cycling with hands on the handlebars (10).

Picture and more information from
http://www.hughston.com/hha/a_15_3_2.htmCarpal tunnel syndrome (compression of the median nerve at the wrist) is another overuse injury that cyclists often experience. This often occurs when a cyclist holds the handlebars on top and applies pressure directly on the median nerve. Symptoms include numbness and tingling in the thumb, index, middle, and ring fingers and weakness of the hand (11).
WEAK AT THE KNEES
Knee Pain was highlighted recently in an article by Catherine McLean, in Ride On Magazine October-November 2005 (16) She wrote,
"Gear choice: one of the most frequent causes of overuse knee injuries, including ITB friction syndrome, is riding in too high a gear. The optimal cadence (pedalling rate) for cycling is about 85 revolutions per minute. Adjust your gears accordingly to maintain this cadence throughout your ride. On hills, choose a gear that will get you to the top with the least effort to minimise stress on the knees." page 32.
Once again, by virtue of the recumbent position, one has to practice riding with the correct cadence to get up hills. While it is possible to use the wrong gear on a recumbent, the amount of work done and the difficulty in maintaining balance while trying to get up a hill by sheer "grunt" discourages the rider from choosing gears that don't maintain a high cadence up a hill. Similarly, other research published in Biomedical Sciences Instrumentation (1) has shown that the recumbent position, all be it on an exercise bike, places less stress on the anterior cruciate ligament of the knee joint.
A PAIN IN THE BACK
Mellion (4) reported that neck and back pain are extremely common in cyclists, occurring in up to 60% of riders.
The prestigious British Journal of Sports Medicine quoted in a 1999 article that "According to the literature, 30-70% of cyclists suffer from cervical, dorsal, or lumbar back pain." (14)
The University of Maryland Spine Program recommends using a recumbent bicycle for at least 20-30 minutes per session (7) for rehabilitation of back problems. Similarly, George J. Kolettis, M.D. stated that "Cycling on a recumbent stationary bike can relieve stress on the back" (8). Furthermore, the website "lowback-pain.com" states “cardiovascular exercise is safest on a recumbent bike 2-3 times per week" (9).
In an article regarding triathletes, (very fit and strong people one would imagine) published in the British Journal of Sports Medicine the Authors reported that over one third of study participants reported back pain and they further suggested that cycling was a major risk factor for low back pain in triathletes (15). So it seems that even for the elite some times the upright bike might be a cause of pain.
A PAIN IN THE NECK
Researchers from The Department of Kinesiology, California State University reported that of the 85% of their sample that had overuse injuries or complaints the most common anatomical site for overuse injury/complaints reported by male and female cyclists was the neck with almost half (48.8%) reporting a problem (13). Interestingly, their research also found that women had 1.5 times chance of developing neck overuse injury or complaint than males in their sample.
A quick check of some of the sites on recumbent cycling come up with much the same conclusion (18, 19, 20, 21, 22, 23, 24, 25) Summed up in this statement:
“To recumbent riders, neck, back, wrist and seat pain are virtually unknown” (18) .
So there you have it, some answers to the question, why do you ride one of those weird looking things, because it avoids some of the pain of cycling and some of the research says it’s good for your body!
REFERENCES
1 Reiser RF 2nd, Broker JP, Peterson ML. Knee loads in the standard and recumbent cycling positions. Biomed Sci Instrum. 2004;40:36-42.
2 Sommer F, Schwarzer U, Klotz T, Caspers HP, Haupt G, Engelmann U. Erectile dysfunction in cyclists. Is there any difference in penile blood flow during cycling in an upright versus a reclining position? European Urology. 2001 Jun;39(6):720-3.
3 Weiss BD. Clinical syndromes associated with bicycle seats. Clin Sports Med. Jan 1994;13(1):175-86.
4 Mellion MB. Common cycling injuries. Management and prevention. Sports Med. Jan 1991;11(1):52-70. [Medline].
5 I. Leibovitch, Y. Mor. The Vicious Cycling: Bicycling Related Urogenital Disorders. European Urology, Volume 47, Issue 3, Pages 277-287
6 Oberpenning F, Roth S, Leusmann DB, van Ahlen H, Hertle L. The Alcock syndrome: temporary penile insensitivity due to compression of the pudendal nerve within the Alcock canal. J Urol. Feb 1994;151(2):423-5. [Medline].
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11 http://www.hughston.com/hha/a_15_3_2.htm
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13 Wilber CA, Holland GJ, Madison RE, Loy SF. An epidemiological analysis of overuse injuries among recreational cyclists. International Jouronal of Sports Medicine. 1995 Apr;16(3):201-6.
14 Salai M, Brosh T, Blankstein A, Oran A, Chechik A. Effect of changing the saddle angle on the incidence of low back pain in recreational bicyclists. British Journal of Sports Medicine. 1999 Dec;33(6):398-400.
15 Manninen JS, Kallinen M. Low back pain and other overuse injuries in a group of Japanese triathletes. British Journal of Sports Medicine. 1996 Jun;30(2):134-9.
16 Catherine McLean. Ride On Magazine the bicycle victoria magazine. Vol 23 No 5 October-November 2005
Bicycle Victoria.
17 Results 1 - 10 of about 166,000 for gential numbness cycling. (0.39 seconds).
http://www.google.com.au/search?hl=en&q=gential+numbness+cycling&btnG=Search&meta=
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18 http://www.lmb.org/wolverbents/
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19 http://www.angletechcycles.com/why_a_recumbent.htm
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20 http://www.ihpva.org/FAQ/
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21 http://www.ihpva.org/people/beckstev/howWC.html
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22 http://www.oraclecycleworks.com/tv1.htm
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23 http://www.asisna.com/hppbikes/
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24 http://wazabike.itgo.com/
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25 http://www.bikeroute.com/WhyBent.html
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