Walker explains that early sleep cycles are rich in deep, non-REM sleep—the kind that restores muscle, strengthens immunity, ...

As he look forward to his 11th season as possibly Sheffield’s most outrageous pantomime dame, Matthew Walker admits that adds up to more quick costume changes than he’d like to remember. The secret, ...

Trim down or bulk up, run faster, or bike farther—however you exercise, our favorite workout apps help you stay committed to physical fitness. I'm an expert in software and work-related issues, and I ...