1. COME UP WITH A STRATEGYWithout one, workout time becomes wasted time. Figure out what equipment you need before you start, says Ed Scow, a certified personal trainer in Lincoln, Nebraska. Grab what you need — dumbbells, stability ball, bands — and put them near a mat or adjustable bench so you can do your entire workout in one place. "You won't expend time wandering from machine to machine or waiting in line," Scow says. "And by creating your own personal space at the gym, you maximize your intensity and efficiency, keeping your heart rate and metabolism up the entire time by moving from one exercise to the next." Don't know where to start? Women's Health's Look Lean & Sexy In Half the Time workout makes workout time planning easy, or just download your favorite workouts to your iPod with the Women's Health Workout to Go.
2. SWAP THIS FOR THATIf you usually focus on exercises that work only a single muscle or muscle group (think: calf raises, leg extensions, and crunches), save time by replacing them with compound movements like squats, lunges, and pushups, which work more muscles at once. "Targeting larger muscle groups burns more calories and gives you a total-body workout in less time," says certified personal trainer Nick Tumminello, owner of Performance University in Baltimore.
Follow these simple tricks to help speed up your metabolism.