Zone 2 just hit a speed bump.
What’s happening: A scientific review challenged low-intensity cardio’s ability to influence longevity in the general population, calling out often-cited studies’ focus on elite athletes.
Second opinion. Advocates like Dr. Peter Attia argue steady, lower heart rate workouts improve mitochondrial function and fat metabolism, reducing chronic disease risk.
But, while helpful for overall health, the review’s panel of kinesiologists disagrees, saying Zone 2 alone won’t cut it, and that higher intensities are needed to enhance longevity.
Adding support, a European study found HIIT and sprint intervals were the most effective.
In the mix. As strength training and Pilates gain ground, HIIT is making a comeback.
Answering demand, operators are upping intensity, with F45, Gold’s Gym, and Everlast Gyms becoming HYROX HQs and NYSC bringing Les Mills equipment-led workout CEREMONY to the States.
Complementing with cardio, Assault Fitness owner FitLab acquired Mile High Run Club, and The Athletic Clubs assigns members a running crew.
Takeaway: Not taking sides, the exercise prescription for longevity probably falls in the middle — blending low and high intensities for optimal results.
