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Smarter, safer workouts with a wearable fitness tracker – Harvard Health

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Smarter, safer workouts with a wearable fitness tracker – Harvard Health


Do you need a little extra inspiration to be more active throughout the day? Or perhaps you’re wondering if your workouts are challenging enough to optimize your cardiovascular health. And if you have any type of heart disease, you’ll want to be sure you’re not pushing yourself too hard during vigorous physical activity. For each of these situations, a wearable fitness tracker may be a worthwhile investment, especially when you consider that exercise is widely considered the best medicine — not just for your heart but for your overall health.

You may already own such a device, as most smart watches include a range of fitness tracking features alongside their other functions. Other options include wrist-worn bands and smart rings that focus primarily on health and fitness tracking.

“The information these wearables provide is measurable, meaningful, and motivating,” says Dr. Sawalla Guseh, director of the Cardiovascular Performance Program at Harvard-affiliated Massachusetts General Hospital. “It’s like having a goal-setting coach with you around the clock,” he says.

Long-term monitoring may also alert you to heart problems, says Dr. Guseh. “I had one patient who didn’t feel chest pain or related symptoms, but he noticed his exercise performance declining over time. It turned out he had coronary artery disease,” he says.

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Features to watch

Here are some of the features on wearable fitness devices that are worth checking out.

Stand or move reminders. Many wearables feature customizable notifications — a message on the watch face or a sound or vibration — to remind you to stand up and move around for a short period of time to break up long stretches of sitting. Even dedicated runners need to avoid being sedentary throughout the day to keep their hearts healthy, says Dr. Guseh (see “Stand up for your heart” in the June 2025 Heart Letter).

Daily step counts. Although you’ve likely heard that 10,000 steps per day is a good goal, that number was based on a Japanese marketing scheme and not actual data. Recent evidence finds that a lower number — anywhere from 4,000 to 7,000 daily steps — is linked to improved heart health. A smartphone (provided you carry it with you most of the day) can give a close estimate of your daily step count, but a wearable will be more accurate. Data from your smart watch automatically syncs with your smartphone, and most have apps that display trends in your step counts and other exercise data over weeks, months, and years.

Heart rate zones. Wearables make it easier to assess your exercise effort with heart rate zones, which classify how intensely you’re exercising by measuring your heart rate. The zones are based on your maximum (or peak) heart rate (MHR) — an estimate of the upper limit of what your cardiovascular system can handle during physical activity. A commonly used formula for MHR is 220 beats per minute minus your age, but you should consider this a ballpark figure, since factors other than age are at play.

Different wearables have varied numbers of heart rate zones, although five is typical. Zones 2 and 3 are generally thought to correspond to moderate-intensity exercise, while zones 4 and 5 correspond to vigorous-intensity exercise. But because they’re not individualized, they may not be accurate for everyone, Dr. Guseh notes. Ideally, you should do at least 150 minutes of moderate-intensity exercise, or 75 minutes or more of vigorous-intensity exercise, or an equivalent combination every week.

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Heart rate recovery (HRR). This value reflects your heart’s ability to return to its normal, resting pace after you stop exercising. It’s the difference between your peak heart rate during exercise and your heart rate at a set time after you stop (typically one to two minutes). A value of 20 beats per minute is considered good, and higher is even better.

Maximal oxygen consumption (VO2 max). This value is the maximum amount of oxygen a person can use during intense exercise. It can be measured directly when a person runs on a treadmill with an oxygen mask in a lab. Some wearables estimate it based on an algorithm that uses data such as your MHR, HRR, pace, weight, and sex. VO2 max is a powerful predictor of cardiovascular health. “The absolute number may not always be accurate, but the trends can be useful. If your VO2 max rises over time, that’s a strong sign your training is improving your fitness,” says Dr. Guseh.

Heart rate variability (HRV). This value is a measure of the variation in time between heartbeats — differences that are just fractions of a second. More variability (a higher value) suggests better heart health, because it reflects the heart’s ability to respond quickly to rapid changes occurring throughout the body. Most wearables report this value, but there isn’t a recommended target because it varies widely depending on your age, sex, fitness level, and medical history. However, it can be useful to track trends in your HRV over time. HRV often falls after a period or stress or illness but then bounces back — a sign that you’re good to go back to exercising, says Dr. Guseh.

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Exercising after a heart disease diagnosis

Anyone who’s had a heart attack, heart surgery, or other heart disease diagnosis should attend cardiac rehabilitation, a personalized program of supervised exercise and heart-healthy lifestyle coaching. It starts with an exercise stress test, which involves closely monitoring your heart during exercise to tailor an effective yet safe exercise program for you.

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“Cardiac rehab is a tried-and-true method of helping people get back into shape, with a standardized protocol that works well for most people,” says cardiologist Dr. Sawalla Guseh, assistant professor of medicine at Harvard Medical School. However, people who were previously exercising at higher intensities and therefore quite fit may get bored at cardiac rehab because it’s too easy for them, he says. If that’s the case for you, consider requesting a referral to a sports cardiologist, who can provide more rigorous and detailed testing and advice, including a specific heart rate threshold you should be careful not to exceed.



Image: © Oscar Wong/Getty Images

Fitness

Expert-Approved Workout Gear, Apparel and More Award-Winning Products From the Women’s Health Fitness Awards

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Expert-Approved Workout Gear, Apparel and More Award-Winning Products From the Women’s Health Fitness Awards

The start of a new year always brings with it lofty goals, inspiring resolutions and promises to oneself about prioritizing health and fitness. It’s overwhelming, to be quite honest, with social media feeds swarming about all the “it” gear, apparel and workout classes that promise to elevate your fitness routine.

Luckily, Women’s Health is here to help: Their annual Fitness Awards dropped earlier today, showcasing innovative at-home gear, a clever water bottle (that will truly help you drink more water), sports bras that actually stay in place and more.

Women’s Health Executive Health and Fitness Director Jacqueline Andriakos and her team spent the entire year trying out everything they could get their hands on in the fitness space. Their list of 60 winners promises to level up your routine in the new year.

See their top picks below across multiple fitness categories, starting at just $19.

Women’s Health Fitness Awards 2026 winners seen on TODAY

Level up your at-home gym with these dumbbells that feature an easy-to-grip exterior that’s soft on the palms, helping to prevent calluses or rough skin. Not only are they great for your palms, but Andriakos calls out a feature that offers support for your wrists too.

“The real hero feature is the square heads — they prevent wobbling and rolling, which is so important for wrist protection when you’re in high plank, doing renegade rows, or doing any stability-based training,” says Andriakos.

“We’re seeing a trend away from classic leggings toward slightly flowier gym-to-street pants, and these are such a comfortable, functional version of that,” says Andriakos referring to the Women’s Health pick for ‘Best Straight-Leg Bottom.’ “They hug in all the right places, come in tons of colors, and — bless them — they offer short, regular and long inseams, which I appreciate as a tall girl.”

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Courtesy Jillian Gonzales

This truly versatile shoe can be your new go-to for any activity — no matter if you’re an avid ClassPass user or prefer hot girl walks.

“They look sleek, they’re super bendy and comfortable, and they’re truly a hybrid shoe,” says Andriakos. “While you can tie them like regular sneakers, I love that they’re easy to slip on thanks to the heel loop—perfect for those moments when I’m holding my daughter and don’t have hands free to tie laces.”

This “no-frills” tote bag won for ‘Best Gym Tote,’ and is washable, meaning you can rid it of any gym-related odors alongside your used workout clothes each week. “It has all the functionality and compartments you’d want whether you’re going to and from the gym or just running around town,” says Andriakos, speaking to the bags’ versatility.

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These were named the ‘Best Running Sock’ by the Women’s Health team, for their “lightweight and low-profile yet cushiony” fit.

“The biggest mistake I’ve made in the past with running socks is wearing ankle-cut and ending up with blisters or open wounds on the back of my ankles or heels,” says Andriakos. “The quarter rise on this pair means your ankle stays fully protected no matter your distance.”

“I really believe even the most mundane items can make daily habits — like hydration — feel more enticing,” says Andriakos, adding that the “window” on this water bottle helps give you visual cues on how much you’ve consumed.

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Plus, you can switch out the caps for either a screw-off or straw lid, depending on your preferences. And, while the brand praises the bottles’ durability, if you happen to break it within the first year of ownership, they’ll send you a replacement.

More Women’s Health Fitness Awards 2026 winners to Shop

This super-stretchy, uber-lightweight tee was named the best for workouts, per Women’s Health. It provides a little more coverage compared to your average workout top, yet remains breathable for yoga or HIIT sessions.

“This bra is hands-down the best high-impact sports bra I’ve ever tried,” raves Andriakos, further calling it her holy grail. “I can’t stand dealing with hardware, clasps or removable pads, and this one eliminates all of that — you just slip it on with zero fidgeting. It does have adjustable straps, though, so you still get a bit of customization in the fit. I also love the scoop neckline. It’s flattering and pretty without being too low-cut, and it gives enough coverage that I never feel like I’m spilling out the top when I’m jumping around during workouts. It has supported me through different life stages, too — my chest has changed sizes during pregnancy and postpartum, and it’s fit me perfectly through all of it.”

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While this bra can double as a workout tank in some ways, Women’s Health awarded it ‘Best Crop.’ It offers medium-support, that the brand says will aid you in any run, rep and even during recovery.

Bala prioritizes “comfort and convenience” in this mat, that they created to be a one-and-done solution for when you need a basic mat for floor workouts, or an assist during planks, lunges, step-ups and more.

“It is genuinely beautiful — and I know that sounds funny when talking about workout equipment, but you really do use the gear that appeals to you,” says Andriakos. “I love aesthetically pleasing equipment, and this mat has those chic curved edges and comes in that trendy foldable style.”

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Vuori is a viral brand — with searches for store locations spiking 180% over the past month alone. These leggings are designed with recycled materials, but that doesn’t mean they compromise on moisture-wicking and multi-stretch features.

“They’re incredibly comfortable (and flattering) with the perfect mid- to high-rise waist, and there are no uncomfortable elastics or drawstrings,” says Andriakos.

Want a versatile pair of leggings that will carry you through any and all workouts? Women’s Health recommends this now award-winning pair, for its moisture-wicking fabric, range of sizes and comfortable, high-rise fit.

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“I get a comment every single time I wear this fleece,” says Andriakos. “I’ve washed it dozens of times now, and it still feels just as soft, even after going through the washer and the dryer. I also love the elastic at the waist because you can cinch it for a more flattering, cozy look while keeping in extra heat. It’s stylish, eye-catching and helps me feel put-together in my activewear life.”

Chirp is also a Shop TODAY-favorite brand (their roller was a Gift We Love in 2025!), so its safe to say we weren’t surprised to see it earn another award, this time for their miniature massage gun.

“The Chirp Mini massager blends the percussion of a massage gun with the rolling motion of a foam roller,” says Andriakos. “It provides targeted relief to sore body parts and with three adjustable speeds, it’s gentler than other techy massage tools but still allows you to get meaningful relief.”

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“The Power Pilates Kit from BetterMe is a bit an investment, but it is a worthwhile one — you get so much bang for your buck!” exclaims Andriakos. “The kit includes mini loop bands in both fabric and rubber, hand weights, grip socks, a Pilates ball, a Pilates ring and a weighted power ring. Basically everything you’d need for a traditional strength-focused resistance workout or a Pilates-sculpt session. It’s all compact equipment too, so if you’re traveling or packing a few things for on-the-go workouts, this bundle is incredibly versatile, so you never need to miss a workout.”

Women’s Health Fitness Awards 2025 previously seen on TODAY

Does sweat drip into your eyes or your hair get disheveled while working out? The Gymwrap 2.0 Headband promises to wick away sweat as you exercise. That way, you don’t have to worry about sweat getting into your eyes or your hair falling loose. The headband also has Evapocool fabric to keep it breathable, cool and ventilating while you wear it.

If you’re like us and have a growing collection of water bottles, you might want to add this Bala Bottle to your round up. Not only will it keep your drink cool, the booster ring on the cap can be used to mount your phone.

Remain hands-free during your runs with the SPI Running Belt. According to the brand, it’s a favorite amongst marathoners. And unlike some running belts on the market, the belt offers ample space and no bounce as you run.

According to the brand, this sandal absorbs 37% more impact than traditional footwear. Meaning, you should experience less stress on the knees, ankles and other joints as you recover. There’s also sizing for men, too, here.

Rhone’s Revive Pocket Leggings promise movement with ease. From its stretchy fabric, anti-odor technology, supportive waistband and oh, the phone pocket (of course!), these leggings should help you move about confidently during your workouts. Choose from this bright plum color above or one of their 15 shades, including black and navy from their core line.

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Although the brand doesn’t have an option for men, they have some workout joggers available.

Meet the experts

Our team features a range of qualified experts and contributors in our broadcast segments to reveal the latest in trends, remarkable sale events and all things shopping across a variety of categories. These items were independently chosen by members of the Shop TODAY team along with Jacqueline Andriakos and the Women’s Health team.

  • Jacqueline Andriakos, NASM-CPT, is the Executive Health and Fitness Director at Women’s Health, certified personal trainer and former group fitness class instructor.

How do you add Shop TODAY as a Preferred Source on Google?

Google’s new Preferred Sources feature allows users to manually select their favorite publishers and news outlets for a more customizable experience tailored directly to the reader. Once you’ve opted to receive our content, you’ll begin seeing more of our recent and trending articles displayed within your Top Stories news feed.

The easiest way to add us as a preferred source is to click here and type in “TODAY.com.” Once the box is checked and you’ve refreshed the page, Shop TODAY content will start appearing in your feed.

How we chose

The Shop TODAY editors and writers search the internet to find the best products out there. We interview expert sources, comb through customer reviews and even use our own personal experiences to make shopping easier for our readers. For this particular article, the Women’s Health team submitted a list of their Fitness Awards winners, from which we chose products to feature on the show.

As an editorial team, we independently create content and determine coverage based on research, reporting and what we think TODAY.com readers would like to read about. The goal of our content is to provide a service and inform readers who are on the hunt for the latest products to help make their life better. Items are sold by retailer, not TODAY. Pricing and availability are accurate as of publish time. Learn more about Shop TODAY.

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Physical Fitness Movies and Shows to Keep You Motivated Toward Your Goals

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Physical Fitness Movies and Shows to Keep You Motivated Toward Your Goals

The New Year is a time when many of us feel motivated to think more about our physical fitness. Lift heavier weights. Run longer distances. Shave a few seconds off that mile time. Whether you’re looking to hit a new PB or simply incorporate more movement into your daily routine, it’s easier to reach your goals if you surround yourself with positive affirmations about staying consistent and practicing discipline.

Lock in by watching these movies and shows that celebrate a good sweat session. You can stream these titles while climbing the Stairmaster, foam rolling after the gym, or enjoying a well-deserved rest day in a cozy, horizontal position. After all, visualization is one way to gear up to get moving — and it can be done from the comfort of your couch.

Final Draft

It’s never too late to restart a fitness journey. This Japanese series gathers together twenty-five former professional athletes — some of whom had no choice but to walk away from their respective sports, and others who retired on their own terms. They take part in a high-stakes survival competition, and the winner is awarded 30 million yen to kick-start their second-chance career. Among the participants: baseball legend Yoshio Itoi, soccer icon Yoshito Ōkubo, and three-division boxing world champion Hozumi Hasegawa.

Lorena, Light-Footed Woman

The sport of running is hard enough, but tackling a long-distance race without some good sneakers is a whole new kind of challenge. This short documentary introduces Lorena Ramírez, the member of Mexico’s Rarámuri community who earned the world’s attention in 2017 by competing in the Cerro Rojo UltraTrail, an ultramarathon of over 30 miles. She did so while wearing huaraches — traditional Mexican sandals — as well as her trademark long skirt and other customary indigenous garb.

The Other Shore: The Diana Nyad Story

Diana Nyad first gained acclaim in 1975 for swimming around Manhattan in record time. This documentary follows the long-distance swimmer as she pursues a perilous goal — swimming from Cuba to Florida without the use of a protective shark cage — a journey she attempts repeatedly, up until the age of 63. Afterward, queue up Nyadthe dramatic take starring Annette Bening as the athlete and Jodie Foster as her best friend and trainer, Bonnie Stoll.

Physical: 100

This search for the ultimate physique in Korea caught the attention of fitness lovers worldwide — for good reason. In this unique tournament, 100 athletes, bodybuilders, and military professionals take part in daunting challenges that test raw strength, speed, endurance, and technique. They face off in various trials until there’s only one competitor left standing. Want even more rivalry? Queue up Physical: Asia, the continent-wide spin-off in which athletes compete in teams representing their countries of origin.

SPRINT

This docuseries closely follows the world’s fastest athletes as they ready their bodies, minds, and spirits to compete in the 2024 Olympic Games in Paris. Created by the same team behind Formula 1: Drive to Survive, these episodes zoom in on American sprinters Gabby Thomas, Noah Lyles, Fred Kerley, Twanisha ‘TeeTee’ Terry, Kenny Bednarek, and Melissa Jefferson-Wooden, as well as runners from the UK, Ivory Coast, Italy, Jamaica, and Kenya. Watching these elite runners prove what the human body is capable of is apt inspiration for athletes at any level. 

Tour de France: Unchained

Go behind the scenes of the world’s most thrilling race on two wheels: the Tour de France, the famed road cycling competition that spans approximately 2,200 miles over a period of three weeks. In each of its three seasons, the series embeds with multiple teams as they race while dealing with terrain, injury, and other setbacks. These episodes track the annual men’s competition in 2022, 2023, and 2024.

Ultimate Beastmaster

After countless hours of training, contestants take on the supersized obstacle course called “The Beast.” Produced by and featuring Sylvester Stallone, the international competition made history when it debuted with six localized versions in various countries, all featuring different competitors, hosts, and languages of origin. (The U.S. edition is hosted by Terry Crews and Charissa Thompson.) Also available to stream: Ultimate Beastmaster Mexico, hosted by Inés Sainz and Luis Ernesto Franco.

 

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Brazilian jiu-jitsu helped me find joy in movement again—here are three of my favorite solo moves you can do at home

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Brazilian jiu-jitsu helped me find joy in movement again—here are three of my favorite solo moves you can do at home

If you’re looking for a way to move your body that builds strength, boosts your mobility and improves your mental agility, you need to try Brazilian jiu-jitsu (also known as BJJ).

Many people assume martial arts aren’t for them. I certainly never thought it was something I would enjoy. Working as a fitness writer, I’ve tried countless forms of exercise over the years, but grappling on the floor with a stranger had never appealed to me.

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