Health24.com | Coffee can be a great pre-workout – if you drink it at the right time

Coffee has long been the go-to beverage of the bleary-eyed early morning crowd – but could the jolt of energy that comes with all that caffeine be put to even better use in the gym?

For some people, the answer to that question is a resounding yes.

Read more: The drone that will deliver you coffee plus predict when you need it

While your local supplement store is likely to have shelves upon shelves of fancy pre-workout powders that get your heart rate buzzing, you could get the same type of benefit with a simple cup of coffee.

Why coffee could be great for your workout

Trainers and athletes alike swear by coffee over pre-workout supplements because they often have the same active ingredient: Caffeine.

The stimulant has proven effective in boosting athletic performance, and nutritionist Megan Medrano of Run Whole Nutrition told MensHealth.com that caffeine ingestion “can improve performance during intense exercise lasting 5 to 20 minutes” – provided that you’re taking it in alongside food.

“Your body still needs an adequate amount of carbohydrates, fat and protein to power through an entire workout,” Medrano added. “If you want to add coffee to your pre-fuelling plan, be sure to add it in addition to your normal meal or snack, not in place of it.”

Certified trainer/stuntman/acrobat Brennan Mejia opts for coffee when he wants an extra boost before a workout. Mejia told MensHealth.com the chemical has numerous positive benefits, from raising energy levels to free fatty acid mobilisation – but he drinks the stuff because of what it doesn’t have.

Read more: Here are 11 reasons you should be drinking coffee right now and the products you should be using

The only ingredients you’ll find in a cup of coffee are milk and sugar, if you add them. That’s not the case with many pre-workout supplements, which might not be on the up-and-up. “Coffee may not contain additives like beta-alanine and creatine found in many pre-workout supplements,” Meija noted – but coffee is regulated by the FDA. “You know what ingredients you’re ingesting,” he said.

When should you take your first sip

If you’re going to use coffee for a workout supplement, you can’t just depend on your morning cup to get the job done. Timing is key.

You might feel your buzz starting within seconds of your first sip, but that doesn’t necessarily mean it’s fully worked its way into your system. Coffee wakes your body up by dispersing caffeine into your bloodstream, which has a half-life (how long it will take for your body to burn through half of the caffeine dosage you ingest) of five to six hours. The stimulating effects of the chemical will hit your body during this period.

But when do the effects peak? At which point is your body going to get the most out of the stimulation the caffeine provides?

The answer? Not too long after you finish that cup, as it turns out. If you’re looking to hit the gym when your caffeine boost is at its most powerful, you’re going to want to down a cup of Joe roughly 45 minutes before working out.

Read more: The key to good teamwork is a big cup of coffee, study finds

Studies show that maximum caffeine concentration hits at about 45 minutes post consumption. From that point forward, your body is burning through the caffeine, lessening its effects. So if you hit the weights right around 45 minutes after downing a cup, you’re going to be experiencing the peak of your caffeine buzz before your body has had time to process the supplement.

The caffeine dosage doesn’t affect this, mind you. Whether you’re drinking a basic cup of Starbucks or going with a highly concentrated brand the saturation will peak roughly at that 45-minute mark.

Just be sure that you don’t exceed 400mg of caffeine in a day, according to the Mayo Clinic’s recommendations. That’s the equivalent of four cups of brewed coffee – so as long as your pre-workout isn’t your fifth hit, you’ll be good to go.

This article was originally published on www.menshealth.com

Image credit: iStock 

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Health24.com | Your Achilles may give crucial heart health clues

For people with coronary artery disease, the thickness of the Achilles tendon may be an indicator of the severity of their disease and how likely they are to have a heart attack, new research suggests.

The Achilles tendon – the longest and strongest tendon in the body – connects the calf muscles to the heel bone. The study, presented recently at the American Heart Association’s Scientific Sessions meeting in Chicago, looked at the association between severity of coronary artery disease and thickness of the Achilles tendon in 241 people who had received a stent to open a blocked blood vessel in their heart.

Highest risk of heart disease and death

The researchers identified participants with an Achilles tendon thickness of 9mm – about a third of an inch – or more. About 80% of those patients had more than one heart artery that was blocked, placing them at higher risk for a heart attack. Among those with a thinner Achilles tendon, 58% had more than one blocked heart artery.

People with a thick Achilles tendon also were more likely to have left main coronary artery disease, which is associated with the highest risk of heart disease and death.

The study’s lead author, Dr Takuya Hashimoto, a cardiologist at the Kitasato University School of Medicine in Tokyo, said that a diagnosis of Achilles tendon thickness could potentially be used to identify people at risk of heart disease.

But he said this study couldn’t confirm that because it included patients already with coronary artery disease and did not look at patients with Achilles tendon thickening due to other causes.

Another study presented at the conference looked at the best way to diagnose familial hypercholesterolemia, or FH, by measuring Achilles tendon thickness.

Intriguing association

FH is an inherited disorder that causes dangerously high cholesterol levels. Achilles tendon lumps caused by cholesterol deposits, known as xanthomas, are a known indicator of coronary artery disease in people with FH.

X-rays are generally used, but the new study found that ultrasound imaging may be better at detecting the genetic condition among people who needed a heart stent.

Dr Philip Ades, a cardiologist at the University of Vermont College of Medicine who was not involved with either study, said the research addresses an association that has intrigued heart doctors for years.

“As a clinician, if I see a patient with a very thickened Achilles tendon or xanthomas, I’ll tell myself, ‘If they’re depositing cholesterol in their tendons, it’s very likely they’re depositing lipids elsewhere, such as in their coronary arteries,'” he said.

But given that there already are numerous ways to predict which patients are more likely to develop coronary artery disease, Ades said he doesn’t see screening for Achilles tendon thickness as something likely to become routine.

“Sending people to the hospital for a fancy X-ray of their Achilles isn’t warranted when we already have these simple measures to tell us who is more likely to have coronary disease,” he said.

Image credit: iStock

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Health24.com | Even 2-minute walks can add up to huge benefits for long-term health

Take the stairs up to your office. Park a little further away from the grocery store. Walk your dog around the block. Carry out the trash.

Any amount of physical activity – even two minutes’ worth – can add up to huge benefits for your immediate and long-term health, according to the new edition of the US Physical Activity Guidelines for Americans.

A solid contribution

Previously, the guidelines held that unless physical activity lasted 10 minutes or longer, it didn’t count toward a person’s recommended weekly activity goals.

But research has shown any small amount of activity provides a solid contribution to a person’s health, according to the second edition of the guidelines unveiled Monday at the American Heart Association’s annual meeting in Chicago.

“The new guidelines demonstrate that, based on the best science, everyone can dramatically improve their health just by moving – anytime, anywhere and by any means that gets you active,” Admiral Brett Giroir, assistant secretary for health at the US Department of Health and Human Services (HHS), said in a news release.

Only 26% of men, 19% of women and 20% of teenagers currently get their recommended weekly amount of physical activity, according to HHS.

The first edition of the Physical Activity Guidelines came out a decade ago, in 2008.

The new edition also highlights a broader array of short- and long-term benefits from physical activity, all based on scientific evidence:

  • Just a single bout of physical activity can sharpen your mind, reduce your anxiety, lower your blood pressure, improve your sleep, and strengthen your body’s ability to convert blood sugar into energy.
  • Regular physical activity can improve your brain health, reduce your risk of eight different forms of cancer, and lower your risk for excess weight gain.
  • Chronic health conditions improved by physical activity include osteoarthritis, high blood pressure, type 2 diabetes, anxiety and depression.

Exercise also helps improve brain function in people with dementia, multiple sclerosis, attention-deficit/hyperactivity disorder and Parkinson’s disease.

“It’s the cheapest prescription in the world, but most people don’t want to fill it,” said Dr Eileen Handberg, a professor of cardiovascular medicine with the University of Florida’s College of Medicine.

No group unaffected

The weekly recommended amount of activity remains the same for adults – at least 150 to 300 minutes of moderate-intensity aerobic activity or 75 to 150 minutes of vigorous-intensity activity, combined with muscle-strengthening activity on at least two days.

Examples of moderate activity include brisk walking, ballroom dancing, water aerobics or pulling weeds, according to the AHA. Vigorous activity can involve running, swimming laps, bicycling fast, aerobic dancing or working a shovel or hoe in the garden.

The guidelines now recommend that children aged two to five be active throughout the day to enhance growth and development – at least three hours a day. Kids aged six through 17 are recommended to have at least 60 minutes of moderate-to-vigorous physical activity.

Pregnant and postpartum women should do at least 150 minutes of moderate-intensity exercise a week, while older adults should add balance training on top of their aerobic and muscle strengthening activities, the guidelines say.

“You need to get out and be active, whether you’re a child or an adult, whether you’re a pregnant woman, whether you have chronic disease – there’s no group that isn’t affected by these guidelines,” said Handberg, a member of the American College of Cardiology’s Prevention of Cardiovascular Disease Committee.

Getting more people moving

AHA President Dr Ivor Benjamin said the association will adopt the guidelines as its official recommendations for physical activity.

“We urge other health groups and interested parties across the country to adopt the guidelines and join us in committing to help ensure more people get moving,” Benjamin said in a statement.

The guidelines should form the foundation for policies supporting physical education in school, bike and pedestrian infrastructure in cities, and workplace promotion of exercise, Benjamin and Handberg said.

Physical activity is so important it should constitute a “fifth” vital sign for doctors, Handberg said.

Any activity is better than none

“That ought to be a health care standard,” Handberg said. “If you go to a health care provider, if I don’t give you your BMI and I don’t assess your physical activity, it’s really not in the forefront of your mind, or mine as your provider.”

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“Patients should be reassured that they do not need large amounts of time or complex exercise regimens to be healthier,” lead author Dr Paul Thompson wrote in an editorial accompanying the guidelines’ publication online in the Journal of the American Medical Association.

“Any activity is better than none,” continued Thompson, a cardiologist with Hartford Hospital in Connecticut. “It also is possible to perform all activities on one or two days per week, because this yields health benefits similar to those achieved through activity on three or more days per week.”

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Baby up at night? Inactivity may be a culprit

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Napping doesn’t help either. In fact, babies who slept less at night, yet napped more during the day, still weren’t able to get as much sleep overall as those who slept more at night. Plus, the tired tots weighed significantly more based on their length, indicating a potential risk for early onset obesity.

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“We know physical activity and sleep influence each other and are strongly associated with growth in older children and adults,” said Janet Hauck, an assistant professor of kinesiology, who specializes in infant motor intervention research. “Our findings suggest that this association could emerge as early as infancy, a critical developmental period.”

Hauck’s research centers around the effect physical activity, such as tummy time, has on babies as they grow and develop. Tummy time is exactly that — the time babies are positioned on their stomachs and encouraged to develop motor skills while supervised.

“While we don’t have evidence yet that tummy time directly affects sleep, it increases physical activity and promotes healthy weight gain,” Hauck said. “So, parents who feel their baby isn’t sleeping enough could promote tummy time during the day to boost their baby’s physical activity level.”

The study analyzed 22 healthy six-month-old infants and monitored physical activity level and sleep over 24 hours. Weight and length were also measured.

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She also indicated that infants who slept longer than 12 hours in a day had a better weight-for-length score, around the 53rd percentile, than those who slept fewer than 12 hours and weighed more.

“Parents can make 12 hours of sleep or more a priority for their baby by creating a bedtime routine and being consistent with it,” Hauck said. “While their little one is awake, they should encourage physical activity by interacting with their baby during floor time activities and do supervised tummy time several times a day.”

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Materials provided by Michigan State University. Note: Content may be edited for style and length.

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Whale songs’ changing pitch may be response to population, climate changes

Blue whales around the world are singing a little flat, and scientists may now have more clues as to the reason why.

A new study finds there’s a seasonal variation in the whales’ pitch correlated with breaking sea ice in the southern Indian Ocean. The new research also extends the mysterious long-term falling pitch to related baleen whales and rules out noise pollution as the cause of the global long-term trend, according to the study’s authors.

Blue and fin whales are among the loudest animals in the oceans as well as the largest. Only males sing, humming about as loud as large ships. The whales’ loud songs can travel more than 1,000 kilometers (600 miles) underwater, allowing the whales to communicate across vast oceans.

Blue whales have been dropping pitch incrementally over several decades, but the cause has remained a mystery. Now, the new study in AGU’s Journal of Geophysical Research: Oceans finds the same mysterious long-term trend of falling pitch in fin whales and Madagascan pygmy blue whales. Pitch, or the perception of how high or low a note sounds, is a result of the frequency of the sound wave, usually measured in hertz.

The authors of the new study use new data from the southern Indian Ocean to rule out noise pollution as the cause of the pitch change. Instead, the new study suggests the pitch drop is an anatomical consequence of singing less loudly. The whales’ calls could be quieter due to growing numbers of whales or changes in the ocean due to climate change, according to the study’s authors.

“We think it is something non-voluntary from the whale. Decrease the call intensity and it will decrease the call frequency, just because of the sound emission mechanism,” said Emmanuelle Leroy, lead author of the new study and a research fellow at the University of New South Wales in Australia.

The new research also uncovers a seasonal counterpoint in the calls of Antarctic blue whales, potentially related to the noise of melting sea ice. The new study finds blue whale calls in the southern Indian Ocean increase in pitch during the summer. The pitch could be increasing as whales sing louder to be heard over breaking sea ice, according to the study’s authors.

“Our hypothesis is that the call frequency change is again linked to call intensity and that the whale will adapt the call intensity to the variation of noise level,” Leroy said. “The noise is related to the increasing number of free icebergs in summer. When the ice sometimes cracks, like when you put ice in your drink, it makes noise. This noise is really strong and will propagate over really long distances, so we can hear this noise at our northernmost site, up to 26 degrees south.”

Analyzing whale songs

The new study analyzed more than 1 million songs from three species of large baleen whale: fin, Antarctic blue and three acoustically-distinct populations of pygmy blue whales. Six stationary underwater microphones recorded the calls over six years, from 2010 to 2015, in the southern Indian Ocean, an area spanning 9 million square kilometers (3.5 million square miles).

The stereotypical song of the Antarctic blue whale spans about 15 to 30 hertz, at the very bottom edge of human hearing, which ranges from about 20-20,000 hertz. Blue whale songs are in the range of the lowest, longest pipes of large cathedral organs. For consistency, the study measured the pitch of selected elements of each species’ song, which had fallen to about 25.6 hertz for the Antarctic blue and 96 hertz for the fin whale by the end of 2015.

In 2002, the pitch of the selected element of the blue whales’ call was closer to 27.5 hertz, a difference from the 2015 values equivalent to about a whole tone or major second interval in Western music tradition.

The new study found Antarctic blue whale calls are falling 0.14 hertz per year. Though fin whales, pygmy blue whales and Antarctic blue whale sing very different songs, the new study observed similar trends in call pitch, falling about 0.12 to 0.54 hertz per year, depending on the species.

The new research also found whale calls rise in pitch by 0.2 — 0.3 hertz from October through February.

Low pitches carry farther underwater, but the pitch change is likely too small to make a difference in the way the whale calls travel over long distances in the ocean and too subtle for the whales to detect any changes, according to the study’s authors

Changing soundscape

Unlike most of the world’s oceans, subject to an increasing mechanical cacophony, the southern Indian Ocean has grown quieter in recent years and its shipping traffic is limited.

Because the long-term trends in pitch drop are steady around the global range of the whales, the data from the Indian Ocean indicates the ongoing drop cannot be explained as a response to human-generated noise. Instead, the authors of the new study suggest the drop could be a byproduct of lower volume if the rebounding whale population doesn’t need to sing as loudly to reach other whales.

Recent population assessments estimate there are 10,000 to 25,000 blue whales globally, up from a few thousand at the end of commercial whaling in the 1970s, but still fewer than 10 percent of their numbers before the 20th century.

“Because the whaling stopped, the whale population is increasing. They can decrease their call intensity to keep in touch, because there are more whales. These calls are long distance communication,” Leroy said.

Alternatively, Leroy said, the whales may not need to be so loud because sound travels farther in ocean water made increasingly acidic by climate change. The speed and distance sound travels are affected by the temperature, pressure and chemistry of the ocean.

Naturally-occurring seasonal ocean noise could explain the seasonal variation in whale call pitch observed by the researchers in the southern Indian Ocean, however.

They observe the seasonal variation in pitch during the months of the austral summer when sea ice breaks up. Iceberg crackles are loud. They boom for thousands of kilometers in a frequency range overlapping the pitch of the Antarctic blue whales’ calls. To be heard over the noise the whales may need to get a little louder, the study suggests. Singing louder makes the pitch go up.

“What’s surprising is the long-term and short-term changes could have the same reason, a change in call intensity, but the change responds to two different causes,” Leroy said.

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