Order: Scorpiones. These are the largest scorpions found in the United States. Most scorpion stings are not considered life threatening to humans -- the exception is the sting of the bark scorpion, the most venomous in the United States. Most of the scorpions in the U.S. are found in the southwest, preferring the warm, dry climates found in Arizona, California and New Mexico.
In general, walking, whether on a treadmill or a track, works your lower body. This includes the quadriceps and hamstrings in your thighs, the gastrocnemius and soleus in your calves, your hip flexors and your gluteal muscles. Bringing your abdominal muscles into the mix by contracting them helps support your lower back as you walk.
Four conditions that can affect your legs and make walking painful. Fitness experts used to stress the benefits of heavy-duty aerobic exercise â the kind that makes you breathe hard and gets your heart going.