CLOSE
Original image
iStock

Want to Burn a Few Calories? Hop in the Bath

Original image
iStock

Taking a nice, hot bath might be good for more than just your mental state. The passive heating from taking a bath—meaning not generated through exercise—can burn some calories, too.

In a study published in the journal Temperature, Loughborough University researchers found that hot baths can lower blood sugar, burn calories, and have an anti-inflammatory effect similar to what’s seen after exercise, as study co-author Steve Faulkner writes in The Conversation (as spotted by Town&Country).

The researchers had 14 men take a hot bath (104°F) for an hour, or do one hour of cycling, raising their core body temperatures around 1.8°F in both conditions. They measured how many calories the men burned during that hour and measured their blood sugar over the next 24 hours.

While cycling did burn more calories, as you might expect, bathing did have significant benefits. That hour-long soak burned about 140 calories—similar to what you’d see if you took a 30-minute walk. The men's blood sugar levels were about the same in both conditions, but just after eating, peak blood sugar values were about 10 percent lower for the bathers than for the cyclists. The bathers’ bodies showed an anti-inflammatory response similar to that associated with exercise, too, which can help protect against infection. All this indicates that raising your body temperature is good for you, whether you do it by running or by taking a long, hot soak.

The study only examined 14 men, making its findings far from definitive. However, people have sworn by the restorative nature of sauna-ing for centuries, and there has been some other modern science to back the idea up. One 20-year study of 2000 Finnish men found that those who spent time in a sauna every day were less likely to die from heart problems than those who only visited a sauna once a week. (Despite some concern over people with heart problems using saunas, scientific reviews have found the practice to be generally safe.) Previous studies have also found that passive heating from saunas and baths raises levels of nitric oxide, which reduces blood pressure, and can reduce dependence on insulin for type 2 diabetics.

So go ahead, treat yourself to that bath. It’s for your health. Just make sure it's nice and hot.

[h/t Town&Country]

Original image
iStock
arrow
Health
This Fitness Startup Lets You Pay for Gym Time by the Minute
Original image
iStock

In a perfect world, factors like time, money, and convenience would never stand in the way of your workouts. But as anyone who’s signed up for a gym membership and never got around to using it knows, that isn't always the case. A new startup aims to make fitness more accessible to people who are unwilling or unable to make a serious financial commitment up front. As Fast Company reports, POPiN lets users at several participating health clubs in New York City pay for gym time by the minute whenever they want.

The concept applies sharing economy principles to the fitness industry. Members with the app on their iPhone or Android phone can choose from four gyms currently partnered with the startup. Each center includes luxurious amenities that are normally exclusive to members paying roughly $200 a month. With POPiN, users can walk in, check in with the front desk, pay $.15 to $.26 for each minute they’re there, and check out before they leave. A 45-minute workout might end up costing them around $8.

The average gym membership goes for nearly $60 a month, and gyms depend on the fact that a significant chunk of their customers let memberships go to waste. POPiN claims it is designed for people who might be more comfortable hitting the treadmill every day one week and taking a break from the gym the next, as opposed to adhering to a strict schedule. With a variety of fitness centers in their system, POPiN also wants to give its users greater access to a diverse range of equipment than they would get with a single gym.

The app has been around for only a few months and is limited to New York City for now, but the long-term plan is to expand to more cities across the country within the year. If you’re still waiting for POPiN to arrive in your area, here are some more app-based ways to improve your exercise regimen today.

[h/t Fast Company]

Original image
iStock
arrow
Animals
15 Examples of the Most Epic Metamorphoses from Youth to Adult
Original image
iStock

We’re all familiar with the most dramatic metamorphosizers of the animal kingdom: butterflies. They go from a tiny egg to an awkward wiggling caterpillar to mysterious pupa to a delicate, colorful winged creature. However, there are many other animals besides butterflies that undergo dramatic transformations from youth to adult. Here are 15 of the most epic metamorphoses seen in nature.

1. LADYBUGS (COCCINELLIDAE)

What’s black, white, and red all over? Many ladybugs are—but only in their final stage of life. Turns out these little beetles undergo one of the most epic metamorphoses in the animal kingdom: For most species, after adult female ladybugs mate, they lay a clutch of tiny yellow eggs right in the middle of an aphid colony, usually on the underside of a leaf. Eggs hatch in a week, revealing spiky black worm-like larvae that readily gobble up the aphids around them. When a larva is fully grown, it changes into a blob-like yellow pupa. Finally, the black, white and red (or sometimes yellow or orange) insect appears.

2. MAYFLY (EPHEMEROPTERA)

Mayflies, the less-elegant cousins of dragonflies and damselflies, have one of the most unique metamorphoses of all insects. Most insects’ life stages move from egg to nymph to pupa to adult, but mayflies do not have a pupa stage. Instead, it is the only type of insect to undergo a subimago stage, meaning it’s almost an adult in the sense it grows wings … but cannot fly long distances and isn’t yet sexually mature. The mayfly’s final life stage, the fully flighted and sexually mature imago or adult, is extremely short, lasting just a few hours to a few days.

3. PEACOCK SPIDER (MARATUS)

Left: Jurgen Otto, Flickr // CC BY-NC-ND 2.0; Right: Jurgen Otto, Flickr // CC BY-NC-ND 2.0

Peacock spiders are tiny, venomous, and beautiful (especially the colorfully rumped males) arthopods native to Australia. Male peacock spiders are so beautiful, in fact, it’s hard to believe that, like all spiders, they go through some not-so-glamorous life stages: egg, egg sac, spiderling, adult. When male peacock spiders reach sexual maturity they try to seduce less-colorful female peacock spiders by performing a showy dance.

4. NUDIBRANCH (NUDIBRANCHIA)

While adult nudibranchs are essentially colorful and ornate blobs of the sea, they don’t start out that way. In fact, after hatching, nudibranch larvae are tiny, plain-looking and have small snail-like shells. Over the course of two months they morph from this plain stage into adults, along the way getting larger and more colorful, losing their shells, and growing gills and feelers, called rhinophores.

5. CROWN OF THORNS STARFISH (ACANTHASTER PLANCI)

Another sea creature that looks completely different as an adult than a juvenile is the crown of thorns starfish. When looking at an adult, it’s easy to see where this creature gets its name: It’s completely covered with dangerous-looking sharp spikes. But after hatching, it looks like not much more than a translucent, floating blob. Over time it grows arms, and later, spikes, then fixes itself to rocks where it feeds on coral.

6. IMMORTAL JELLYFISH (TURRITOPSIS DOHRNII)

The secret to a long and prosperous life, it turns out, is to be a jellyfish. The aptly named immortal jellyfish begins life as an egg, like all other jellies. It then enters the free-swimming larva stage, then settles down into a polyp on the ocean floor, and then finally morphs into a sexually mature jellyfish. Unlike most other jellies, an immortal jellyfish is capable of reverting back into the polyp stage at any time it faces environmental stress, attacks by predators, sickness or old age—essentially being reborn as a young jelly.

7. FLATFISH (PLEURONECTIFORMES)

Think of Pablo Picasso’s most asymmetrically painted human face, stick it onto a fish, and there you have a flatfish. These fish, which include flounder and sole among other species, begin life inside tiny eggs that float up to the surface of the sea. For a few weeks, a larval flatfish swims upright and looks just like a typical baby fish. But after a few weeks its skull bones shift and one eye migrates to the opposite side of its face, forcing the now-lopsided fish to swim sideways. Eventually, when its facial features all move to one side of its face, it changes color and moves to live on the bottom of the sea, its blind side facing down.

8. EASTERN HELLBENDER (CRYPTOBRANCHUS ALLEGANIENSIS)

Left: Pete and Noe Woods, Flickr // CC BY 2.0; Right: Projosh More, Flickr // CC BY 2.0

Also called the snot otter and devil dog, the eastern hellbender is a giant type of salamander not exactly known for being beautiful in its adult form. Slippery, wrinkly and the color of mud, they’re right at home at the bottom of rivers, where they can live up to 50 years. Like all salamanders, hellbenders begin as eggs. From their eggs they hatch, coming into the world small and adorable. As time passes, they grow larger and less cute.

9. CHALAZODES BUBBLE NEST FROG (RAORCHESTES CHALAZODES)

Don’t let this lime-green frog’s bright and cheery looks fool you: It lives in only one tiny area in India and is critically endangered, threatened most by an ever-shrinking habitat. These creatures were once believed to lay eggs that developed into tadpoles on pond surfaces like many other frogs. But in 2014, it was discovered that they had a different reproductive strategy: The frogs crawl into a living bamboo shoot that has a hole in it (probably created by insects or rodents) and lay their eggs there. The creatures skip the tadpole stage entirely, hatching as froglets. Because they don't have a tadpole stage, the species doesn't require water to lay its eggs.

10. MIMIC POISON DART FROG (RANITOMEYA IMITATOR)

Mattias Starkenberg, Wikimedia Commons // CC BY-SA 3.0

Covered in bright hues spotted, striped, banded, and blotched with contrasting black, the poison dart frog is one of the most striking-looking of all amphibians. Yet they don’t start out that way. After hatching, young mimic poison dart frogs are looked after by their mother, who lays a clutch of unfertilized feeder eggs to provide them with some nourishment (and, at least for some species of poison dart frog, toxicity). Tadpoles are brown and black, growing more colorful with age until they reach their fantastic adult form.

11. KEA (NESTOR NOTABILIS)

The kea is a large, vulnerable species of parrot native to New Zealand, with green and blue feathers on its back and brown and orange feathers on its underside. While adult keas appear majestic and beautiful, they don’t start out that way. Baby keas retain an alien-like, sparse white hairdo for several months after hatching. Keas are considered a very intelligent species, observed working together and using tools.

12. LAYSAN ALBATROSS (PHOEBASTRIA IMMUTABILIS)

Laysan albatrosses are another species of bird where the babies are very little like their parents. But unlike baby keas, baby Laysan albatrosses hatch as adorable fuzzy gray blobs. As they grow older, the babies slowly grow adult feathers and lose their baby feathers. This leaves them with unique hairdos that sometimes make them look like human celebrities. Ringo Starr, anyone?

13. FLAMINGO (PHOENICOPTERUS)

Left: Getty Images // Right: iStock

Unlike keas and albatrosses, baby flamingoes look a lot like their parents, except they’re missing something: color. Flamingo chicks hatch with gray and/or white feathers, over time taking on the same pink hue as their parents, which becomes more intense over time. Why? Well, you are what you eat, and flamingoes eat shrimp and algae rich in carotenoids, the same pigments that cause shrimp to turn pink when cooked.

14. VIRGINIA OPOSSUM (DIDELPHIS VIRGINIANA)

Virginia opossums are scavengers, eating carrion and rotting vegetation, and that helps keep the environment clean. Virginia opossums are native to North America, where they’re the continent’s only living marsupials. These opossums have pouches for carrying their babies, just like kangaroos. Also like kangaroos they give birth to large numbers of navy-bean-size babies, which grow inside their pouches. When they’re born, they look more like pink jellybeans than animals. Over the course of three to five months, they mature, growing fur, sharp teeth and long tails.

15. GIANT PANDA (AILUROPODA MELANOLEUCA)

Getty Images

Giant pandas are called giant pandas for a reason: They’re enormous in size, weighing up to 250 pounds. But these bamboo-munching bears don’t start out that way. When born, giant panda cubs weigh just 90 to 130 grams (about as much as a small apple). Besides being way smaller in size, baby pandas are also quite sparsely furred—and so they look very different than what they will as fuzzy black-and-white adults.

SECTIONS

arrow
LIVE SMARTER
More from mental floss studios