To be able to run a 10-kilometer race in 45 minutes, for example, you'd have to do more than putter in your yard or stroll around the shopping mall. In fact, you'd have to focus on doing vigorous aerobic exercise several times per week, for many weeks, before attaining the level of cardiovascular fitness required to run that fast for that long. The same holds true for other forms of exercise. If you want to add several pounds of muscle to your physique, you'd have to train at heavy work loads several times per week, for weeks on end. If, on the other hand, all you want is to be able to pick up your grandchildren without straining yourself, basic calisthenics a couple of times per week will suffice.
Soy foods are a complete protein.
That means they contain all the essential amino acids. Soybeans are also a good source of absorbable calcium, iron, B vitamins and zinc. Soy foods are high in fiber, low in saturated fats and, because they are a plant food, contain no cholesterol. In regard to relieving menopausal symptoms including hot flashes, researchers believe that the phytoestrogens found in soy foods are responsible. These phytoestrogens may also inhibit estrogen-dependent tumor growth.