"AI is the devil and I its maker."

I spent the last few weeks with the Sennheiser Momentum 5 to determine if this pair actually stands out, testing everything from sound quality and noise cancellation to comfort and battery life.

PNOĒ, the Malden, Mass.-based startup whose breath-analyzing mask used to bear an unfortunate resemblance to Bane's, is launching a sleeker self-serve version on October 1 that lets gym-goers measure their VO₂ max and other metabolic markers in eight minutes without a trained operator.

The limited test covers select products and users, with a broader rollout planned for later in October.