Why are my muscles sore after exercise? Hint: it’s nothing to do with lactic acid
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As many of us hit the gym or go for a run to recover from the silly season, you might notice a bit of extra muscle soreness.
This is especially true if it has been a while between workouts.
A common misunderstanding is that such soreness is due to lactic acid build-up in the muscles.
Research, however, shows lactic acid has nothing to do with it. The truth is far more interesting, but also a bit more complex.
It’s not lactic acid
We’ve known for decades that lactic acid has nothing to do with muscle soreness after exercise.
In fact, as one of us (Robert Andrew Robergs) has long argued, cells produce lactate, not lactic acid. This process actually opposes not causes the build-up of acid in the muscles and bloodstream.
Unfortunately, historical inertia means people still use the term “lactic acid” in relation to exercise.
Lactate doesn’t cause major problems for the muscles you use when you exercise. You’d probably be worse off without it due to other benefits to your working muscles.
Lactate isn’t the reason you’re sore a few days after upping your weights or exercising after a long break.
So, if it’s not lactic acid and it’s not lactate, what is causing all that muscle soreness?
Muscle pain during and after exercise
When you exercise, a lot of chemical reactions occur in your muscle cells. All these chemical reactions accumulate products and by-products which cause water to enter into the cells.
That causes the pressure inside and between muscle cells to increase.
This pressure, combined with the movement of molecules from the muscle cells can stimulate nerve endings and cause discomfort during exercise.
The pain and discomfort you sometimes feel hours to days after an unfamiliar type or amount of exercise has a different list of causes.
If you exercise beyond your usual level or routine, you can cause microscopic damage to your muscles and their connections to tendons.
Such damage causes the release of ions and other molecules from the muscles, causing localised swelling and stimulation of nerve endings.
This is sometimes known as “delayed onset muscle soreness” or DOMS.
While the damage occurs during the exercise, the resulting response to the injury builds over the next one to two days (longer if the damage is severe). This can sometimes cause pain and difficulty with normal movement.
The upshot
Research is clear; the discomfort from delayed onset muscle soreness has nothing to do with lactate or lactic acid.
The good news, though, is that your muscles adapt rapidly to the activity that would initially cause delayed onset muscle soreness.
So, assuming you don’t wait too long (more than roughly two weeks) before being active again, the next time you do the same activity there will be much less damage and discomfort.
If you have an exercise goal (such as doing a particular hike or completing a half-marathon), ensure it is realistic and that you can work up to it by training over several months.
Such training will gradually build the muscle adaptations necessary to prevent delayed onset muscle soreness. And being less wrecked by exercise makes it more enjoyable and more easy to stick to a routine or habit.
Finally, remove “lactic acid” from your exercise vocabulary. Its supposed role in muscle soreness is a myth that’s hung around far too long already.
Robert Andrew Robergs, Associate Professor – Exercise Physiology, Queensland University of Technology and Samuel L. Torrens, PhD Candidate, Queensland University of Technology
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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100 Things Productive People Do – by Nigel Cumberland
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This is a book of a hundred small chapters (the book is 396 pages, so 2–3 pages per chapter) which makes for a feeling of quick reading, and definitely gives an option of “light bites”, dipping into the book here and there.
Cumberland offers a wide range of practical wisdom here, and while the book is (per the title) focused on productivity, it also includes all due weight to not burning out and/or breaking down. Because things productive people do does not, it turns out, include working themselves directly into an early grave.
But—despite the author’s considerable and obvious starting point of social privilege—nor is this a tome of “offer your genius leadership and otherwise just coast while everyone does your work for you”, either. This is a “brass tacks” book and highly relatable whether your to-do list most prominently features “personally manage the merger of these Fortune 500 companies” or “sort out that junk in the spare room”
Bottom line: we’d be surprised if this book with 100 pieces of advice failed to bring you enough value to more than pay for itself!
Pick up your copy of 100 Things Productive People Do from Amazon today!
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Teriyaki Chickpea Burgers
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Burgers are often not considered the healthiest food, but they can be! Ok, so the teriyaki sauce component itself isn’t the healthiest, but the rest of this recipe is, and with all the fiber this contains, it’s a net positive healthwise, even before considering the protein, vitamins, minerals, and assorted phytonutrients.
You will need
- 2 cans chickpeas, drained and rinsed (or 2 cups of chickpeas, cooked drained and rinsed)
- ¼ cup chickpea flour (also called gram flour or garbanzo bean flour)
- ¼ cup teriyaki sauce
- 2 tbsp almond butter (if allergic, substitute with a seed butter if available, or else just omit; do not substitute with actual butter—it will not work)
- ½ bulb garlic, minced
- 1 large chili, minced (your choice what kind, color, or even whether or multiply it)
- 1 large shallot, minced
- 1″ piece of ginger, grated
- 2 tsp teriyaki sauce (we’re listing this separately from the ¼ cup above as that’ll be used differently)
- 1 tsp yeast extract (even if you don’t like it; trust us, it’ll work—this writer doesn’t like it either but uses it regularly in recipes like these)
- 1 tbsp black pepper
- 1 tsp fennel powder
- ½ tsp sweet cinnamon
- ½ tsp MSG or 1 tsp low-sodium salt
- Extra virgin olive oil for frying
For serving:
- Burger buns (you can use our Delicious Quinoa Avocado Bread recipe)
- Whatever else you want in there; we recommend mung bean sprouts, red onion, and a nice coleslaw
Method
(we suggest you read everything at least once before doing anything)
1) Preheat the oven to 400℉ / 200℃.
2) Roast the chickpeas spaced out on a baking tray (lined with baking paper) for about 15 minutes. Leave the oven on afterwards; we still need it.
3) While that’s happening, heat a little oil in a skillet to a medium heat and fry the shallot, chili, garlic, and ginger, for about 2–3 minutes. You want to release the flavors, but not destroy them.
4) Let them cool, and when the chickpeas are done, let them cool for a few minutes too, before putting them all into a food processor along with the rest of the ingredients from the main section, except the oil and the ¼ cup teriyaki sauce. Process them into a dough.
5) Form the dough into patties; you should have enough dough for 4–6 patties depending on how big you want them.
6) Brush them with the teriyaki sauce; turn them onto a baking tray (lined with baking paper) and brush the other side too. Be generous.
7) Bake them for about 15 minutes, turn them (taking the opportunity to add more teriyaki sauce if it seems to merit it) and bake for another 5–10 minutes.
8) Assemble; we recommend the order: bun, a little coleslaw, burger, red onion, more coleslaw, mung bean sprouts, bun, but follow your heart!
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- Three Daily Servings of Beans/Legumes?
- Hoisin Sauce vs Teriyaki Sauce – Which is Healthier?
- Sprout Your Seeds, Grains, Beans, Etc
- Our Top 5 Spices: How Much Is Enough For Benefits? ← we scored 4/5 today!
- Monosodium Glutamate: Sinless Flavor-Enhancer Or Terrible Health Risk?
Take care!
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Can a drug like Ozempic help treat addictions to alcohol, opioids or other substances?
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Semaglutide (sold as Ozempic, Wegovy and Rybelsus) was initially developed to treat diabetes. It works by stimulating the production of insulin to keep blood sugar levels in check.
This type of drug is increasingly being prescribed for weight loss, despite the fact it was initially approved for another purpose. Recently, there has been growing interest in another possible use: to treat addiction.
Anecdotal reports from patients taking semaglutide for weight loss suggest it reduces their appetite and craving for food, but surprisingly, it also may reduce their desire to drink alcohol, smoke cigarettes or take other drugs.
But does the research evidence back this up?
Animal studies show positive results
Semaglutide works on glucagon-like peptide-1 receptors and is known as a “GLP-1 agonist”.
Animal studies in rodents and monkeys have been overwhelmingly positive. Studies suggest GLP-1 agonists can reduce drug consumption and the rewarding value of drugs, including alcohol, nicotine, cocaine and opioids.
Out team has reviewed the evidence and found more than 30 different pre-clinical studies have been conducted. The majority show positive results in reducing drug and alcohol consumption or cravings. More than half of these studies focus specifically on alcohol use.
However, translating research evidence from animal models to people living with addiction is challenging. Although these results are promising, it’s still too early to tell if it will be safe and effective in humans with alcohol use disorder, nicotine addiction or another drug dependence.
What about research in humans?
Research findings are mixed in human studies.
Only one large randomised controlled trial has been conducted so far on alcohol. This study of 127 people found no difference between exenatide (a GLP-1 agonist) and placebo (a sham treatment) in reducing alcohol use or heavy drinking over 26 weeks.
In fact, everyone in the study reduced their drinking, both people on active medication and in the placebo group.
However, the authors conducted further analyses to examine changes in drinking in relation to weight. They found there was a reduction in drinking for people who had both alcohol use problems and obesity.
For people who started at a normal weight (BMI less than 30), despite initial reductions in drinking, they observed a rebound increase in levels of heavy drinking after four weeks of medication, with an overall increase in heavy drinking days relative to those who took the placebo.
There were no differences between groups for other measures of drinking, such as cravings.
Some studies show a rebound increase in levels of heavy drinking. Deman/Shutterstock In another 12-week trial, researchers found the GLP-1 agonist dulaglutide did not help to reduce smoking.
However, people receiving GLP-1 agonist dulaglutide drank 29% less alcohol than those on the placebo. Over 90% of people in this study also had obesity.
Smaller studies have looked at GLP-1 agonists short-term for cocaine and opioids, with mixed results.
There are currently many other clinical studies of GLP-1 agonists and alcohol and other addictive disorders underway.
While we await findings from bigger studies, it’s difficult to interpret the conflicting results. These differences in treatment response may come from individual differences that affect addiction, including physical and mental health problems.
Larger studies in broader populations of people will tell us more about whether GLP-1 agonists will work for addiction, and if so, for whom.
How might these drugs work for addiction?
The exact way GLP-1 agonists act are not yet well understood, however in addition to reducing consumption (of food or drugs), they also may reduce cravings.
Animal studies show GLP-1 agonists reduce craving for cocaine and opioids.
This may involve a key are of the brain reward circuit, the ventral striatum, with experimenters showing if they directly administer GLP-1 agonists into this region, rats show reduced “craving” for oxycodone or cocaine, possibly through reducing drug-induced dopamine release.
Using human brain imaging, experimenters can elicit craving by showing images (cues) associated with alcohol. The GLP-1 agonist exenatide reduced brain activity in response to an alcohol cue. Researchers saw reduced brain activity in the ventral striatum and septal areas of the brain, which connect to regions that regulate emotion, like the amygdala.
In studies in humans, it remains unclear whether GLP-1 agonists act directly to reduce cravings for alcohol or other drugs. This needs to be directly assessed in future research, alongside any reductions in use.
Are these drugs safe to use for addiction?
Overall, GLP-1 agonists have been shown to be relatively safe in healthy adults, and in people with diabetes or obesity. However side effects do include nausea, digestive troubles and headaches.
And while some people are OK with losing weight as a side effect, others aren’t. If someone is already underweight, for example, this drug might not be suitable for them.
In addition, very few studies have been conducted in people with addictive disorders. Yet some side effects may be more of an issue in people with addiction. Recent research, for instance, points to a rare risk of pancreatitis associated with GLP-1 agonists, and people with alcohol use problems already have a higher risk of this disorder.
Other drugs treatments are currently available
Although emerging research on GLP-1 agonists for addiction is an exciting development, much more research needs to be done to know the risks and benefits of these GLP-1 agonists for people living with addiction.
In the meantime, existing effective medications for addiction remain under-prescribed. Only about 3% of Australians with alcohol dependence, for example, are prescribed medication treatments such as like naltrexone, acamprosate or disulfiram. We need to ensure current medication treatments are accessible and health providers know how to prescribe them.
Continued innovation in addiction treatment is also essential. Our team is leading research towards other individualised and effective medications for alcohol dependence, while others are investigating treatments for nicotine addiction and other drug dependence.
Read the other articles in The Conversation’s Ozempic series here.
Shalini Arunogiri, Addiction Psychiatrist, Associate Professor, Monash University; Leigh Walker, , Florey Institute of Neuroscience and Mental Health, and Roberta Anversa, , The University of Melbourne
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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I’ve been given opioids after surgery to take at home. What do I need to know?
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Opioids are commonly prescribed when you’re discharged from hospital after surgery to help manage pain at home.
These strong painkillers may have unwanted side effects or harms, such as constipation, drowsiness or the risk of dependence.
However, there are steps you can take to minimise those harms and use opioids more safely as you recover from surgery.
Flystock/Shutterstock Which types of opioids are most common?
The most commonly prescribed opioids after surgery in Australia are oxycodone (brand names include Endone, OxyNorm) and tapentadol (Palexia).
In fact, about half of new oxycodone prescriptions in Australia occur after a recent hospital visit.
Most commonly, people will be given immediate-release opioids for their pain. These are quick-acting and are used to manage short-term pain.
Because they work quickly, their dose can be easily adjusted to manage current pain levels. Your doctor will provide instructions on how to adjust the dosage based on your pain levels.
Then there are slow-release opioids, which are specially formulated to slowly release the dose over about half to a full day. These may have “sustained-release”, “controlled-release” or “extended-release” on the box.
Slow-release formulations are primarily used for chronic or long-term pain. The slow-release form means the medicine does not have to be taken as often. However, it takes longer to have an effect compared with immediate-release, so it is not commonly used after surgery.
Controlling your pain after surgery is important. This allows you get up and start moving sooner, and recover faster. Moving around sooner after surgery prevents muscle wasting and harms associated with immobility, such as bed sores and blood clots.
Everyone’s pain levels and needs for pain medicines are different. Pain levels also decrease as your surgical wound heals, so you may need to take less of your medicine as you recover.
But there are also risks
As mentioned above, side effects of opioids include constipation and feeling drowsy or nauseous. The drowsiness can also make you more likely to fall over.
Opioids prescribed to manage pain at home after surgery are usually prescribed for short-term use.
But up to one in ten Australians still take them up to four months after surgery. One study found people didn’t know how to safely stop taking opioids.
Such long-term opioid use may lead to dependence and overdose. It can also reduce the medicine’s effectiveness. That’s because your body becomes used to the opioid and needs more of it to have the same effect.
Dependency and side effects are also more common with slow-release opioids than immediate-release opioids. This is because people are usually on slow-release opioids for longer.
Then there are concerns about “leftover” opioids. One study found 40% of participants were prescribed more than twice the amount they needed.
This results in unused opioids at home, which can be dangerous to the person and their family. Storing leftover opioids at home increases the risk of taking too much, sharing with others inappropriately, and using without doctor supervision.
Don’t stockpile your leftover opioids in your medicine cupboard. Take them to your pharmacy for safe disposal. Archer Photo/Shutterstock How to mimimise the risks
Before using opioids, speak to your doctor or pharmacist about using over-the-counter pain medicines such as paracetamol or anti-inflammatories such as ibuprofen (for example, Nurofen, Brufen) or diclofenac (for example, Voltaren, Fenac).
These can be quite effective at controlling pain and will lessen your need for opioids. They can often be used instead of opioids, but in some cases a combination of both is needed.
Other techniques to manage pain include physiotherapy, exercise, heat packs or ice packs. Speak to your doctor or pharmacist to discuss which techniques would benefit you the most.
However, if you do need opioids, there are some ways to make sure you use them safely and effectively:
- ask for immediate-release rather than slow-release opioids to lower your risk of side effects
- do not drink alcohol or take sleeping tablets while on opioids. This can increase any drowsiness, and lead to reduced alertness and slower breathing
- as you may be at higher risk of falls, remove trip hazards from your home and make sure you can safely get up off the sofa or bed and to the bathroom or kitchen
- before starting opioids, have a plan in place with your doctor or pharmacist about how and when to stop taking them. Opioids after surgery are ideally taken at the lowest possible dose for the shortest length of time.
A heat pack may help with pain relief, so you end up using fewer painkillers. New Africa/Shutterstock If you’re concerned about side effects
If you are concerned about side effects while taking opioids, speak to your pharmacist or doctor. Side effects include:
- constipation – your pharmacist will be able to give you lifestyle advice and recommend laxatives
- drowsiness – do not drive or operate heavy machinery. If you’re trying to stay awake during the day, but keep falling asleep, your dose may be too high and you should contact your doctor
- weakness and slowed breathing – this may be a sign of a more serious side effect such as respiratory depression which requires medical attention. Contact your doctor immediately.
If you’re having trouble stopping opioids
Talk to your doctor or pharmacist if you’re having trouble stopping opioids. They can give you alternatives to manage the pain and provide advice on gradually lowering your dose.
You may experience withdrawal effects, such as agitation, anxiety and insomnia, but your doctor and pharmacist can help you manage these.
How about leftover opioids?
After you have finished using opioids, take any leftovers to your local pharmacy to dispose of them safely, free of charge.
Do not share opioids with others and keep them away from others in the house who do not need them, as opioids can cause unintended harms if not used under the supervision of a medical professional. This could include accidental ingestion by children.
For more information, speak to your pharmacist or doctor. Choosing Wisely Australia also has free online information about managing pain and opioid medicines.
Katelyn Jauregui, PhD Candidate and Clinical Pharmacist, School of Pharmacy, Faculty of Medicine and Health, University of Sydney; Asad Patanwala, Professor, Sydney School of Pharmacy, University of Sydney; Jonathan Penm, Senior lecturer, School of Pharmacy, University of Sydney, and Shania Liu, Postdoctoral Research Fellow, Faculty of Medicine and Dentistry, University of Alberta
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Pain Relief Secret – by Sarah Warren
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This one’s a book to not judge by the cover—or the title. The title is actually accurate, but it sounds like a lot of woo, doesn’t it?
Instead, what we find is a very clinical, research-led (40 pages of references!) explanation of:
- the causes of musculoskeletal pain
- how this will tend to drive us to make it worse
- what we can do instead to make it better
A lot of this, to give you an idea what to expect, hinges on the fact that bones only go where muscles allow/move them; muscles only behave as instructed by nerves, and with a good development of biofeedback and new habits to leverage neuroplasticity, we can take more charge of that than you might think.
Warning: you may want to jump straight into the part with the solutions, but if you do so without a very good grounding in anatomy and physiology, you may find yourself out of your depth with previously-explained terms and concepts that are now needed to understand (and apply) the solutions.
However, if you read it methodically cover-to-cover, you’ll find you need no prior knowledge to take full advantage of this book; the author is a very skilled educator.
Bottom line: while it’s not an overnight magic pill, the methodology described in this book is a very sound way to address the causes of musculoskeletal pain.
Click here to check out The Pain Relief Secret, and help your body undo damage done!
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