If there’s a refrain that would most define my life growing up, it’d be, usually hissed in public by my mother, “Stop slouching.” Try as I might, slouching is a habit I haven’t been able to kick, and now that I work a 9-to-5 desk job, it’s even more difficult. My mom always threatened to strap a wood plank to my back (thankfully, she never followed through), but I’d love to tell her now there are more advanced, less splinter-filled ways of correcting bad posture and training a good one. The Upright Go ($79.95) is a small posture corrector that attaches to your back and sends vibration reminders whenever you slouch. Connected to the app, it provides a training program, real-time feedback, and statistics to gradually improve your posture — and your back health and sense of confidence along with it. Could a device the size of my car keys really correct a lifetime of slump? I tried the Upright Go Posture Trainer to find out. The slim, white device measures about 1″ x 2,” with a power button, back adhesive, and USB charging port. A stark contrast from traditional posture correctors that strap around your body, it’s small eno...