The case for HIIT: Why short, intense workouts are so good for your fitness and longevity

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A back view of a woman with a ponytail and workout clothes prepared to go up a set of concrete stairs outside.
Research suggests that short, intense bursts of exercise like taking the stairs can have long-term health benefits.

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The UK's Fittest Woman uses rucking to get fitter and stronger. Here's how she's training for the CrossFit Games.

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Side by side of Aimee Cringle, a CrossFit athlete, as she works out in a gym.
Aimee Cringle is a 25-year-old British CrossFit athlete.

Courtesy of Common Ground

Alev Kelter helped the US win its first medal in rugby. She prepared with protein, saunas, and vulnerable talks with her teammates.

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Composite image showcasing Olympic American rugby player Alev Kelter, with a headshot alongside an action shot of Kelter running with rugby ball

Courtesy of USA Rugby; BI

Ryan Reynolds' longtime personal trainer shared 5 simple pieces of advice he gives clients to boost their longevity

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A composite image of Don Saladino with Ryan Reynolds, and a plate of salmon, rice, and asparagus
Don Saladino, left, has been training Ryan Reynolds for 15 years. He advises all clients to include plenty of fiber in their meals alongside protein, carbs, and fats.

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Lululemon just released new leggings. Shoppers and shareholders are mad.

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A Lululemon store in Hong Kong.
Lululemon stopped selling a new line this week after criticism from shoppers.

Budrul Chukrut/SOPA Images/LightRocket via Getty Images

Ryan Reynolds' personal trainer shares how the 47-year-old actor got in shape for 'Deadpool & Wolverine' while keeping longevity in mind

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Ryan Reynolds beside a person lifting weights.
Ryan Reynolds and his Deadpool 3 workout regiment.

Michael Steele/Getty Images; iStock; BI

A busy doctor says he's reversed his age from 78 to 57. Here's his simple, 3-step workout routine.

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Dr. Michael Roizen's headshot, a picture of a grey-haired man jogging from behind.
Dr. Michael Roizen fits exercise into his busy schedule.

Cleveland Clinic/Getty Images

I only lost 30 pounds on Ozempic. After switching to the keto diet, I lost 120 more and reversed my diabetes.

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Before and after photos of a man who lost 100 pounds in weight.
Dan Brown before and after his body transformation.

Courtesy of Dan Brown/Virta Health

Rucking is a buzzy fitness trend so I tried it. I'm fit and loved how efficiently it turned my daily walk into a challenging workout.

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Photo illustration of Rachel Hosie.
Rachel Hosie tried rucking, a workout loved by tech execs and CrossFit athletes.

Rachel Hosie; Jenny Chang-Rodriguez/BI

4 traits shared by fit and active older people, according to a personal trainer whose eldest client is 96

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Lauren Hurst lifting dumbbells.
Lauren Hurst specializes in personal training for older adults.

Nick Cinea/ Lauren Hurst

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