Older adults typically lose muscle mass as they age.  Muscle loss increases the risk of falls, decreases mobility and reduces tissue area critical for normal blood sugar metabolism.  Japanese researchers showed that consuming a protein snack containing 15 grams of protein plus daily light weight training increased lean body mass and muscle cross-sectional area, while reducing body fat in older adults.  Combining light exercise with regular protein intake can prevent muscle deterioration during aging.  (Journal Nutritional Science Vitaminology, 57: 233-238, 2011)