Tech

摘要

Gadgets have a long and distin- guished history of helping human beings be more sedentary (exhibit A: the TV remote control). But the latest generation of battery-powered wristbands and clip-on devices aims to reverse that trend, encouraging healthy activity by tracking how many steps you've taken and calories you've burned. Lark's $150 Larklife bracelet will even tell you to get off your duff: "Noticed you've been sitting for a while," its iPhone app chided me.