Creatine works twofold. It helps your muscles retain water, which means they’ll really pop, and it gives you long-lasting energy, which means you can make it through a grueling core workout, no problem. And taking it is effortless: just drop a scoop into your water bottle next time you head to the gym. (Best Life recommends the fruit punch flavor. It’s far and away the smoothest.) And for more great workout-boosting dietary additions, check out the 50 Best Supplements on the Planet.
Start on your back, bend your knees up with shins parallel to the floor and extend your arms to the ceiling. Straighten your left leg and extend your right arm back to about 6 inches off of the floor, and then come back to the original position. Then, repeat the exercise on the opposite side. Just be sure to keep your abs engaged throughout this move to really work your muscles!