ALAMEDA, Calif. — The new Whoop physical fitness tracker straps around the wrist, a great deal like any other health and fitness monitor or smartwatch. But you can also obtain a sports bra or leggings geared up with this small system, which can be a sliver of electronics stitched into the fabric of apparel.
Squeezing a fitness tracker into these a svelte deal was no smaller feat, stated John Capodilupo, Whoop’s main technological innovation officer. It expected a whole new type of battery. The battery, crafted by a California begin-up, Sila, supplied the tiny health and fitness tracker with much