To Get Women to Bike More, Build Better Bike Lanes

Mario Tama/Getty Images
Mario Tama/Getty Images

Biking is a great way to stay healthy and get around town without paying for gas, but not everyone bikes in equal numbers. There’s a gender gap in bike commuting, one that’s easily illustrated by bike-share numbers. Several years after its launch, the membership of New York’s Citi Bike program was less than a third female, and it isn’t a problem that’s unique to New York or bike-sharing in general.

A good way to get more women cycling, though, is to install more bike lanes, as researchers from the University of British Columbia and the University of Colorado concluded in a recent study in the Journal of Transport and Land Use. It sounds intuitive and, indeed, studies have shown that adding bike infrastructure leads to more people biking in general.

But it’s particularly important to talk about how to get women on bikes because the gender gap in cycling is so large in the U.S., even though the approximately equal shares of women and men biking in Europe tell us that riding a bike isn’t a uniquely male activity.

The latest study examined cycling demographics by neighborhood in Montreal and Vancouver, two cities that both have a diverse selection of bike infrastructure ranging from painted lanes to cycleways separated from the street. The researchers found that if a neighborhood had access to some kind of bike infrastructure within about half a mile (1 kilometer), that area saw four times as many people cycling as neighborhoods without bike lanes. But the difference between cycling on the road with cars and cycling in a dedicated lane of some sort had an even more significant impact for women specifically.

Though women make up half the commuters in Montreal and Vancouver, they were much less likely than men to ride bikes to and from work if there wasn’t any bike infrastructure. In some neighborhoods without infrastructure, only a tenth of the cycling commuters were women, while in one with better access to bike lanes, women made up almost half of the cyclists. When more bike commuters were hitting the road in a neighborhood, the percentage of men and women was about equal, perhaps because of the “safety in numbers” phenomenon.

Shaded maps of Montreal and Vancouver show the percentages of commuters bike.
The percentage of commuters in each neighborhood who get to work by bicycle, with darker colors indicating a greater share.
Teschke et al., Journal of Transport and Land Use, 2017

“To give women an equal opportunity to bike to work, municipalities need to build a great quality cycling network,” Kay Teschke, a professor of public health at the University of British Columbia and the study’s lead author, said in a Q&A with UBC’s news team.

The new study data, taken from 2011 Census results, may paint a slightly different picture than you might find in those cities now, six years later, when there might be new bike lanes or more bike commuters. Not to mention the fact that bike lanes aren’t necessarily spread evenly throughout a city, so other factors may be influencing this data, as the researchers admit. For instance, wealthier neighborhoods tend to have better bike infrastructure, which is why bike lanes have become a symbol of gentrification. But the results do track with previous research on the subject. A study in 2013 found that women cared more about cycling near bike paths or trails than men did, and several studies have found that women are more concerned about the safety issues associated with riding a bike than male riders.

Whether for men or women, though, the study makes it clear that cities could do a lot more to encourage cycling. People were more likely to bike if their neighborhood had an interconnected web of bike lanes, not just a few scattered paths. “The pattern of results suggested that the network formed by other bikeway types may have been more important than the specific bikeway characteristics,” the researchers write.

“Even though biking is faster and easier, more people walked to work than biked to work in both cities,” Teschke noted in her Q&A. She suggests that one reason could be that sidewalks are ubiquitous, but bicycle lanes are not—and whether men or women, people are apt to choose a mode of transport that makes them feel safe over one that’s a little more convenient but makes them think they’re about to get run over at any minute.

And while it might not seem that important to get women on bikes, cycling has major benefits that, ideally, the whole population should enjoy. Surveys find that people who cycle to work are happier than other types of commuters, and a 2016 study found that cyclists in the Netherlands outlive non-cyclists.

The Best (and Worst) States to Have a Baby

iStock
iStock

While having a baby is usually a joyous occasion, the logistics of the process can differ wildly based on where you’re raising your family. Healthcare costs, hospital rankings, mortality rates, availability of doctors and midwives, and many other factors vary from state to state and region to region.

WalletHub recently decided to crunch some numbers to figure out which states are the best for soon-to-be and brand-new parents, and which are the worst. The financial advisory site (which loves to rank states on characteristics like how happy, fun, and environmentally friendly they are) examined a number of different factors related to pregnancy, childbirth, and infancy in all 50 states plus the District of Columbia.

The data encompassed 26 different factors related to childbirth and parenting, including how much hospitals typically charge for C-sections and conventional deliveries, the average cost of a babysitter, the state’s parental-leave policy, maternal and infant mortality rates, vaccination rates, and how many pediatricians, OB-GYNs, midwives, and childcare centers there are per capita.

Below are the top 10 best states for having a baby overall, according to WalletHub's analysis.

1. Vermont
2. Massachusetts
3. Minnesota
4. New Hampshire
5. North Dakota
6. Connecticut
7. Colorado
8. Nebraska
9. District of Columbia
10. California

And here are the top 10 worst:

1. Mississippi
2. Alabama
3. South Carolina
4. Louisiana
5. Oklahoma
6. West Virginia
7. Georgia
8. Arkansas
9. New Mexico
10. Nevada

Few states had consistent ratings across all categories, in part because in the U.S., good healthcare is incredibly expensive. Vermont, the overall winner, was number one in the healthcare category and number five in family friendliness, but it ranked all the way down at number 20 for cost. California cracked the overall top 10, but was more costly than any other state save Alaska. Louisiana, meanwhile, was the cheapest state to have a baby, but was 51st in the healthcare rankings.

The best states to give birth in aren’t necessarily the best states to raise a child in, either, according to the site's analysis. New Hampshire was second in health care, but number 40 for baby friendliness, meaning it has few child care centers and poor parental leave policies. Maine, too, was number seven in the healthcare rankings but only number 37 in baby friendliness.

Overall, it seems that when it comes to having kids, no state is perfect. See the full list at WalletHub.

[h/t a plus]

12 Facts About Kidney Stones

Illustration by Mental Floss. Images: iStock
Illustration by Mental Floss. Images: iStock

Kidney stones are more common than ever. According to Harvard Medical School, every year more than 3 million people see a doctor for relief from these hard mineral and salt deposits, which form in your kidney when urine becomes too concentrated. Here's what we know about the condition formally called nephrolithiasis.

1. KIDNEY STONES TYPICALLY CAUSE REALLY PAINFUL SYMPTOMS.

At first you may notice your urine is cloudy, bloody, and foul smelling. Your back may begin to ache, and nausea may come over you. Then, as the stone moves from your kidney into your urinary tract or bladder, sometimes becoming trapped, there’s often an intense, stabbing pain that many people say they wouldn’t wish on their worst enemy.

2. MOST PEOPLE DEVELOP ONE TYPE OF STONE …

What kind of kidney stone you get depends on your diet, fluid intake, genetics, hereditary disorders, and even whether you take certain medications, but the vast majority of people get calcium oxalate stones. They're formed from a mix of calcium in urine and the compound oxalate, which is found naturally in food like nuts, chocolate, and some vegetables, including beets and spinach; oxalate is also produced by your liver. There's some evidence that people who take the seizure medicine topiramate can develop these stones in the form of calcium phosphate.

3. … BUT THERE ARE THREE OTHER KINDS TOO.

Struvite stones are fast-growing mineral deposits that typically develop in response to a urinary tract infection, and can grow large enough to block the kidney, ureter, or bladder before you notice any symptoms; they affect women more than men. Uric acid stones turn up in people who eat a lot of red meat, shellfish, and organ meats, which contain hefty doses of an organic compound called purine that can lead to more uric acid than the kidneys can excrete. Cystine stones are caused by a rare hereditary disorder called cistinuria in which your kidneys excrete excessive amounts of the amino acid cystine.

4. THEY'RE EXTREMELY COMMON—ESPECIALLY IN MEN.

There's a solid chance you could end up with a kidney stone. The National Kidney Foundation notes that one in 10 people will develop one during the course of their life. And if you’re male, take note: Your gender alone is considered a kidney stone risk factor. Men are twice as likely as women to develop them. Another factor is age: Although stones are most common from ages 20 through 50, they tend to peak around age 30.

5. IF YOU’VE HAD A KIDNEY STONE, YOU’LL PROBABLY DEVELOP ANOTHER ONE …

Sorry to say, but simply having a kidney stone puts you at risk for a recurrence. If you’ve had one, the U.S. National Library of Medicine notes that there’s a 30 to 50 percent chance more stones will form within five years.

6. … BUT YOU CAN TAKE STEPS TO PREVENT THEM.

Cutting back on sodium (i.e. deli meats, packaged soups, and processed foods) can help, because a stone can form from excessive salt consumption. You should also avoid too much animal protein—it produces urine containing more acid, which is known to increase your risk for kidney stones—and increase your intake of fruits, vegetables, whole grains, and low-fat dairy. And be sure to drink plenty of fluids, especially water—at least 12 glasses a day. (That's good advice for everyone, not just those prone to kidney stones.)

Don't drink much apple or cranberry juice as both contain oxalates and are linked to an increased risk of developing calcium oxalate stones. High doses of Vitamin C may boost the concentration of oxalate in urine; the Cleveland Clinic recommends a daily maximum of 500 milligrams.

7. IT'S A MYTH THAT CALCIUM CREATES SOME KIDNEY STONES.

Despite the fact that the word calcium is part of the most common kind of kidney stone, you don’t need to treat calcium as the enemy. In fact, having too little calcium can actually increase the odds you’ll get these types of stones. According to the Cleveland Clinic, eating about two or three servings of calcium-rich foods daily reduces oxalate absorption, helping to keep calcium oxalate stones away. So get out the cheese.

8. IF YOU PASS A STONE, CONGRATULATIONS! NOW TAKE IT TO A DOCTOR.

Ninety percent of kidney stones are passed through urination. Getting one out this way may hurt a lot, but once the stone has finished causing you agony, it could provide clues that could help you avoid developing another one. If you’re able to retrieve the stone, bring it to your doctor, who can order an analysis. Identifying its components can reveal the kind of stone it is and potentially point to a treatment or prevention plan.

9. IF YOU CAN’T PASS A STONE, TREATMENTS ARE AVAILABLE …

In an attempt to exit the body, a stone travels from the kidney to the bladder through a narrow tube called the ureter. If the stone is larger than a quarter-inch, it's simply too big to pass through the ureter, and will get trapped there. (If it can make it through to your bladder, it's small enough to pass out out of your body through the urethra.) This causes intense pain, blocked urine flow, and possible bleeding from urinary tract walls. That's when it's time for treatment.

There are several methods for getting rid of a kidney stone, all of which aim to break the stone into smaller pieces so they can leave the body. In an extracorporeal shock wave lithotripsy (from the Greek for "crushed stone"), high-frequency sound waves are applied externally to break stones up, allowing them to pass when you pee. Laser lithotripsy takes a similar approach: Stones in the ureter are broken up with a laser and also leave the body naturally. More invasive is percutaneous ultrasonic lithotripsy, which involves passing narrow instruments (including a fiberoptic camera) through your back to your kidney; ultrasound breaks the stones up, and then fragments are removed by an instrument. Finally, a ureteroscopy is a treatment option in which a small scope is inserted in the ureter towards the bladder to determine the stone's location. Then it's broken up for natural passage or removed altogether. Luckily, you're unconscious under general anesthesia during the last procedure.

10. … AND THEY'RE FAR SUPERIOR TO THOSE USED IN THE PAST.

Kidney stones are nothing new—mentions of the painful formations go back more than 5000 years, to Mesopotamian medical texts—and medical interventions have occurred for just as long. Stones made it into the Hippocratic Oath, in which physicians swore they would "not use the knife, not even on sufferers from stone," leaving the procedure to "such men as are engaged in this work" [PDF]. Surgeons in ancient Greece and India were attempting stone removal as far back as the 7th century BCE.

The 16th to 18th centuries were a heyday for stone surgeons, who were largely self-taught. The most notorious of them was Frere Jacques Beaulieu. He pioneered the lateral perineal lithotomy—which involved making an incision in the perineum, inserting a terrifying cutting instrument into the bladder, cutting up the stone, and then extracting the pieces with the instrument or his fingers—in the late 17th century. Unfortunately for his patients, he had no technical training, and his method was often deadly; in 1698, after 25 of his 60 patients died, he was banned from doing the procedure—but he didn't stop. He's thought to have performed more than 5000 lithotomies. (And no, the song doesn't seem to be about him.)

11. IF ALL ELSE FAILS, TRY RIDING A ROLLER COASTER.

If you’re a thrill seeker who happens to have kidney stones (and some vacation time), you may be in luck. After a "notable number" of patients reported that riding the Big Thunder Mountain roller coaster at Walt Disney World in Orlando helped them to pass their kidney stones, Michigan State University urologist David Wartinger decided to investigate. He created a kidney replica—complete with kidney stones—put it in a backpack, and let it ride the roller coaster 60 times. It worked—but passing the stones depended on where the backpack was placed in the coaster. Rides in the last car were the most effective, with the stones passing 64 percent of the time, while the front few cars yielded only a 16 percent success rate.

Big Thunder Mountain was the only ride in the theme park that was effective. Neither Space Mountain nor Aerosmith's Rock 'n' Roller Coaster did the trick, likely because they were too fast, with a G-force that pinned the stones in place. Of course, while this is an interesting finding, if you suspect you have kidney stones, speak to your doctor before you high-tail it to Walt Disney World.

12. A KIDNEY STONE THE SIZE OF A MOUSE WAS REMOVED FROM A MAN IN 2004.

The stone measured 5.11 inches at its widest point—a world record. Five years later, a whopping 2.5-pound stone was surgically removed from a man in Hungary in 2009. Perhaps seeing a bunch of kidney stones in one place other than originating from your own body will put you at ease. If that’s the case, check out the International Museum of Surgical Science in Chicago, where a collection of stones is on display in glass jars.

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