What are heart rate zones, and how can you incorporate them into your exercise routine?
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If you spend a lot of time exploring fitness content online, you might have come across the concept of heart rate zones. Heart rate zone training has become more popular in recent years partly because of the boom in wearable technology which, among other functions, allows people to easily track their heart rates.
Heart rate zones reflect different levels of intensity during aerobic exercise. They’re most often based on a percentage of your maximum heart rate, which is the highest number of beats your heart can achieve per minute.
But what are the different heart rate zones, and how can you use these zones to optimise your workout?
The three-zone model
While there are several models used to describe heart rate zones, the most common model in the scientific literature is the three-zone model, where the zones may be categorised as follows:
- zone 1: 55%–82% of maximum heart rate
- zone 2: 82%–87% of maximum heart rate
- zone 3: 87%–97% of maximum heart rate.
If you’re not sure what your maximum heart rate is, it can be calculated using this equation: 208 – (0.7 × age in years). For example, I’m 32 years old. 208 – (0.7 x 32) = 185.6, so my predicted maximum heart rate is around 186 beats per minute.
There are also other models used to describe heart rate zones, such as the five-zone model (as its name implies, this one has five distinct zones). These models largely describe the same thing and can mostly be used interchangeably.
What do the different zones involve?
The three zones are based around a person’s lactate threshold, which describes the point at which exercise intensity moves from being predominantly aerobic, to predominantly anaerobic.
Aerobic exercise uses oxygen to help our muscles keep going, ensuring we can continue for a long time without fatiguing. Anaerobic exercise, however, uses stored energy to fuel exercise. Anaerobic exercise also accrues metabolic byproducts (such as lactate) that increase fatigue, meaning we can only produce energy anaerobically for a short time.
On average your lactate threshold tends to sit around 85% of your maximum heart rate, although this varies from person to person, and can be higher in athletes.
In the three-zone model, each zone loosely describes one of three types of training.
Zone 1 represents high-volume, low-intensity exercise, usually performed for long periods and at an easy pace, well below lactate threshold. Examples include jogging or cycling at a gentle pace.
Zone 2 is threshold training, also known as tempo training, a moderate intensity training method performed for moderate durations, at (or around) lactate threshold. This could be running, rowing or cycling at a speed where it’s difficult to speak full sentences.
Zone 3 mostly describes methods of high-intensity interval training, which are performed for shorter durations and at intensities above lactate threshold. For example, any circuit style workout that has you exercising hard for 30 seconds then resting for 30 seconds would be zone 3.
Striking a balance
To maximise endurance performance, you need to strike a balance between doing enough training to elicit positive changes, while avoiding over-training, injury and burnout.
While zone 3 is thought to produce the largest improvements in maximal oxygen uptake – one of the best predictors of endurance performance and overall health – it’s also the most tiring. This means you can only perform so much of it before it becomes too much.
Training in different heart rate zones improves slightly different physiological qualities, and so by spending time in each zone, you ensure a variety of benefits for performance and health.
So how much time should you spend in each zone?
Most elite endurance athletes, including runners, rowers, and even cross-country skiers, tend to spend most of their training (around 80%) in zone 1, with the rest split between zones 2 and 3.
Because elite endurance athletes train a lot, most of it needs to be in zone 1, otherwise they risk injury and burnout. For example, some runners accumulate more than 250 kilometres per week, which would be impossible to recover from if it was all performed in zone 2 or 3.
Of course, most people are not professional athletes. The World Health Organization recommends adults aim for 150–300 minutes of moderate intensity exercise per week, or 75–150 minutes of vigorous exercise per week.
If you look at this in the context of heart rate zones, you could consider zone 1 training as moderate intensity, and zones 2 and 3 as vigorous. Then, you can use heart rate zones to make sure you’re exercising to meet these guidelines.
What if I don’t have a heart rate monitor?
If you don’t have access to a heart rate tracker, that doesn’t mean you can’t use heart rate zones to guide your training.
The three heart rate zones discussed in this article can also be prescribed based on feel using a simple 10-point scale, where 0 indicates no effort, and 10 indicates the maximum amount of effort you can produce.
With this system, zone 1 aligns with a 4 or less out of 10, zone 2 with 4.5 to 6.5 out of 10, and zone 3 as a 7 or higher out of 10.
Heart rate zones are not a perfect measure of exercise intensity, but can be a useful tool. And if you don’t want to worry about heart rate zones at all, that’s also fine. The most important thing is to simply get moving.
Hunter Bennett, Lecturer in Exercise Science, University of South Australia
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Get Rid Of Female Facial Hair Easily
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Dr. Sam Ellis, dermatologist, explains:
Hair today; gone tomorrow
While a little peach fuzz is pretty ubiquitous, coarser hairs are less common in women especially earlier in life. However, even before menopause, such hair can be caused by main things, ranging from PCOS to genetics and more. In most cases, the underlying issue is excess androgen production, for one reason or another (i.e. there are many possible reasons, beyond the scope of this article).
Options for dealing with this include…
- Topical, such as eflornithine (e.g. Vaniqa) thins terminal hairs (those are the coarse kind); a course of 6–8 weeks continued use is needed.
- Hormonal, such as estrogen (opposes testosterone and suppresses it), progesterone (downregulates 5α-reductase, which means less serum testosterone is converted to the more powerful dihydrogen testosterone (DHT) form), and spironolactone or other testosterone-blockers; not hormones themselves, but they do what it says on the tin (block testosterone).
- Non-medical, such as electrolysis, laser, and IPL. Electrolysis works on all hair colors but takes longer; laser needs to be darker hair against paler skin* (because it works by superheating the pigment of the hair while not doing the same to the skin) but takes more treatments, and IPL is a less-effective more-convenient at-home option, that works on the same principles as laser (and so has the same color-based requirements), and simply takes even longer than laser.
*so for example:
- Black hair on white skin? Yes
- Red hair on white skin? Potentially; it depends on the level of pigmentation. But it’s probably not the best option.
- Gray/blonde hair on white skin? No
- Black hair on mid-tone skin? Yes, but a slower pace may be needed for safety
- Anything else on mid-tone skin? No
- Anything on dark skin? No
For more on all of this, enjoy:
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Take care!
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Never Enough – by Dr. Judith Grisel
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We’ve reviewed books about addiction before—specifically about alcohol, at least. This one’s more general in that it covers different addictions.
On the other hand, it’s also more specific, in that it covers them from the author’s field: neuroscience.
…and experience too. The author had a plethora of addictions (the serious kind), got sober, and then undertook to study neuroscience. Her hope was to help others avoid, or escape from the same as‚ what she went through.
Dr. Grisel (as she now is) takes a methodical approach in this book. She works her way through the addictive mechanisms of a broad selection of common drugs, explaining each.
The focus here is on neutral explanations, rather than the propagandizing scaremongering that failed at least one generation. Why each drug is alluring, what it really does do—and the neurological price it exacts, down to the molecular level.
She also covers risk factors for addiction; genetic, epigenetic, and environmental. There’s no “if you were stronger”, or “these people made bad choices”, so much as… Many addicts were, in effect, sabotaged from before birth.
That doesn’t mean that to become addicted or not is just fate, but it does mean… There but for the grace of factors completely outside of our control go we.
Why is this useful to us, be we a reader without any meaningful addiction (we’re not counting coffee etc here)? Well, as this book illustrates and explains, many of us could be one (more) mishap away from a crippling addiction and not know it. Forewarned is forearmed.
Bottom line: almost all of us are, have been, or will be touched by addiction in some way. Either directly, or a loved one, or a loved one’s loved one, or perhaps a parent who gave us an epigenetic misfortune. This book gives understanding that can help.
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The Plant-Based Athlete – by Matt Frazier and Robert Cheeke
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If you’re already a seasoned plant-based athlete yourself, you can probably skip this book; the 60 recipes at the end would still provide value, but there is the “No Meat Athlete Cookbook” that you could hop straight to, in any case.
For most readers, there will be plenty of value from start to finish. We get a quick ground-up tour of nutrition basics, before getting into restructuring diet to optimize it for performance.
There is less in the way of “Vegans struggle with…” and more in the way of “People think vegans struggle with…” and explanations of what vegan athletes actually eat. The book does include science, but isn’t too science-heavy, and relies more on modelling what plant-based superathletes enjoy on a daily basis.
To that end,if the book has a weak point, it’s perhaps that it could have stood to include more science. The book comes recommended by Dr. Michael Greger, whose nutritional approach is incredibly science-heavy and well-referenced, and this book is obviously compatible with that (so they could have!), but in this case Frazier and Cheeke leave us to take their word for it.
Nevertheless, the science is good whether they cite it or not, and this book is quite a comprehensive primer of plant-based athleticism.
Bottom line: if you’re wondering how to optimize the two goals of “eating plants” and “being a powerful athlete”, then this one’s the book for you.
Click here to check out The Plant-Based Athlete and upgrade your health and athletic performance!
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The Compass of Pleasure – by Dr. David Linden
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There are a lot of books about addiction, so what sets this one apart?
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But, Dr. Linden argues, not every addiction has to be so. Especially behavioral addictions; the rush of dopamine one gets from a good session at the gym or learning a new language, that’s not a bad thing, even if they can fundamentally be addictions too.
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Bottom line: if you’d like to understand what is going on when you get waylaid by some temptation, and how to be tempted to better things, this book can give the understanding to do just that.
Click here to check out The Compass of Pleasure, and make yours work in your favor!
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Cool As A Cucumber
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Cucumber Extract Beats Glucosamine & Chondroitin… At 1/135th Of The Dose?!
Do you take glucosamine & chondroitin supplements for your bone-and-joint health?
Or perhaps, like many, you take them intermittently because they mean taking several large tablets a day. Or maybe you don’t take them at all because they generally contain ingredients derived from shellfish?
Cucumber extract has your back! (and your knees, and your hips, and…)
It’s plant-derived (being from botanical cucumbers, not sea cucumbers, the aquatic animal!) and requires only 1/135th of the dosage to produce twice the benefits!
Distilling the study to its absolute bare bones for your convenience:
- Cucumber extract (10mg) was pitted against glucosamine & chondroitin (1350mg)
- Cucumber extract performed around 50% better than G&C after 30 days
- Cucumber extract performed more than 200% better than G&C after 180 days
In conclusion, this study indicates that, in very lay terms:
Cucumber extract blows glucosamine & chondroitin out of the water as a treatment and preventative for joint pain
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Midwives Blame California Rules for Hampering Birth Centers Amid Maternity Care Crisis
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Jessie Mazar squeezed the grab handle in her husband’s pickup and groaned as contractions struck her during the 90-minute drive from her home in rural northeastern California to the closest hospital with a maternity unit.
She could have reached Plumas District Hospital, in Quincy, in just seven minutes. But it no longer delivers babies.
Local officials have a plan for a birth center in Quincy, where midwives could deliver babies with backup from on-call doctors and a standby perinatal unit at the hospital, but state health officials have yet to approve it.
That left Mazar to brave the long, winding road — one sometimes blocked by snow, floods, or forest fires — to have her baby. Women across California are facing similar ordeals as hospitals increasingly close money-losing maternity units, especially in rural areas.
Midwife-operated birth centers offer an alternative for women with low-risk pregnancies and can play a crucial role in filling the gap left by hospitals’ retreat from obstetrics, maternal health advocates say.
Declining birth rates, staffing shortages, and financial pressures have led 56 California hospitals — about 1 in 6 — to shutter maternity units over the past dozen years.
But midwives say California’s regulatory regime around birth centers is unnecessarily preventing new centers from opening and leading some existing facilities to close. Obtaining a license can take as long as four years.
“All they’ve essentially done is made it more dangerous to have a baby,” said Sacramento midwife Bethany Sasaki. “People have to drive two hours now because a birth center can’t open, so it’s more dangerous. People are going to be having babies in cars on the side of the road.”
Last month, state Assembly member Mia Bonta introduced legislation to streamline the regulatory process and fix what she calls “a broken system” for licensing birth centers.
“We know that alternative birth centers lead to often better outcomes, lower-risk births, more opportunity for children to be born healthy, and also to lower maternal mortality and morbidity,” she said.
The proposed bill would remove various bureaucratic requirements, though many details have yet to be finalized. Bonta introduced the bill in its current form as a jumping-off point for discussions about how to expedite licensing.
“It’s a starting place,” said Sandra Poole, health policy advocate for the Western Center on Law & Poverty, a co-sponsor of the legislation.
For now, birth centers struggle with a gantlet of rules, only some clearly connected to patient safety. Over the past decade, the number of licensed birth centers in California dropped from 12 to five, according to Bonta.
Plumas County officials are trying to address one key issue: how far a birth center can be from a hospital with a round-the-clock obstetrics unit. State regulations say it can be no more than a 30-minute drive, a distance set when many more hospitals had maternity units.
The first-of-its-kind “Plumas model” aims to take advantage of flexibility provisions in the law to address the obstacle in a way that could potentially be replicated elsewhere in the state.
But the hospital’s application for a birth center and a perinatal unit has been “languishing” with the California Department of Public Health, which is “looking for cover from the legislature,” said Robert Moore, chief medical officer of Partnership HealthPlan of California, a Medi-Cal managed-care plan serving most of Northern California. Asked about the application, a CDPH spokesperson said only that it was under review.
The goal should be for all women to be within an hour’s drive of a hospital with an obstetrics unit, Moore said. Data shows the complication rate goes up after an hour and even higher after two hours, he said, while the benefit is less compelling between 30 and 60 minutes.
Numerous other regulations have made it difficult for birth centers to keep their doors open.
Since August, birth centers in Sacramento and Monterey have had to stop operating because their heating ducts failed to meet licensing requirements. The facilities fall under the same state Department of Health Care Access and Information regulations as primary care clinics, though birth centers see healthy families, not sick ones, and don’t need hospital-grade ventilation, said midwife Caroline Cusenza.
She had spent $50,000 remodeling the Monterey Birth & Wellness Center to include state-required items, such as nursing and hand-washing stations and a housekeeping closet. In the end, a requirement for galvanized steel heating vents, which would have required opening the ceiling at an unaffordable cost, prompted her heart-wrenching decision to close.
“We’re turning women away in tears,” said Sasaki, who owned Midtown Birth Center in Sacramento. She bought the building for $760,000 and spent $250,000 remodeling it in a way she believed met all licensing requirements. But regulators would not license it unless the heating system was redone. Sasaki estimated it would have cost an additional $50,000 to bring it into compliance — too much to keep operating.
She blamed her closure on “regulatory dysfunction.”
Legislation signed by Gov. Gavin Newsom last year could ease onerous building codes such as those governing Sasaki’s and Cusenza’s heating systems, said Poole, the health policy advocate.
The state has taken two to four years to issue birth center licenses, according to a brief by the Osher Center for Integrative Health at the University of California-San Francisco. The state Department of Public Health “works tirelessly to ensure health facilities are able to be properly licensed and follow all applicable requirements within our authority before and during their operation,” spokesperson Mark Smith said.
Bonta, an Oakland Democrat who chairs the Assembly’s health committee, said she would consider increasing the allowable drive time between a birth center and a hospital maternity unit as part of her new legislation.
The state last updated birth center regulations more than a decade ago, before hospitals’ mass exodus from obstetrics. “The hurdle is the time and distance standards without compromising safety,” Poole said. “But where there’s nothing right now, we would say a birth center is certainly a better alternative to not having any maternal care.”
Moore noted that midwife-led births in homes and birth centers are the mainstay of obstetric care in Europe, where the infant mortality rate is considerably lower than in the U.S. More than 98% of American babies are born in hospitals.
Babies delivered by midwives are more likely to be born vaginally, less likely to require intensive care, and more likely to breastfeed, the California Maternal Quality Care Collaborative has found. Midwife-led births also lead to fewer infant emergency room visits, hospitalizations, and neonatal deaths. And they cost far less: Birth centers generally charge one-quarter or less of the average cost of about $36,000 for a vaginal birth in a California hospital.
If they catered only to private-pay clients, Cusenza and Sasaki could have continued operating without licenses. They must be licensed, however, to receive payments from Medi-Cal and some private insurance companies, which they needed to remain in business. Medi-Cal, the state’s Medicaid health insurance program, which covers low-income residents, paid for about 40% of the state’s births in 2022.
Bonta has heard reports from midwives that the key to getting licensed is hunting down the right state health department advocate. “I don’t believe that we should be building resources based on the model of ‘Where’s Waldo?’ in finding a champion inside CDPH,” she said.
Lori Link, director of midwifery at Plumas District Hospital, believes the Plumas model can turn what’s become a maternity desert into an oasis. Jessie Mazar, whose son was born in September without complications at a Truckee hospital, would welcome the opportunity to deliver her planned second child in Quincy.
“That would be convenient,” she said. “We’re not holding our breath.”
This article was produced by KFF Health News, which publishes California Healthline, an editorially independent service of the California Health Care Foundation.
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