4. GO NUTS FOR NUTS
Gwen Stefani and Alicia Keys request that their dressing rooms be stocked with nuts, and for good reason: In addition to being good protein sources, they're chock-full of magnesium, a mineral the body uses to activate cell enzymes that produce energy.
According to a study from the U.S. Department of Agriculture, women who got only about half the daily quota for magnesium tired out more quickly during a jog than those who consumed sufficient amounts.
"Most women need 320 milligrams of magnesium daily, but when you're feeling overextended, I recommend increasing to 500 to 1,000 milligrams," says Koff. Besides cashews (83 mg per ounce) and almonds (76 mg per ounce), other top magnesium sources include spinach (157 mg per cup, cooked) and roasted pumpkin seeds (156 mg per ounce).
| Jun 16, 2010