A theme which can be explored and expressed in a variety of different ways, existentialism is a belief based on the free will of the individual which suggests that all future development is created as a result of their own self determined actions.
People who do strengthening and toning exercises in an effort to trim fat from a certain area -- thighs, hips, stomach, or arms -- have the wrong idea. Although these exercises can help firm muscles, if the targeted area still carries an extra layer of fat, it won't look much different.
The latter exercise targets the iliopsoas muscles around your hips and lower back, but also works the other hip flexors and some hip adductors. As with other body-weight leg lifts, you can increase the intensity of most leg raises by holding a dumbbell between your feet or by wearing ankle weights.