The Bureau of Labor Statistics, BLS, reports that airline pilots earned an average of $118,070 per year in 2011. The majority were employed by the scheduled air transportation industry and averaged $119,180 per year. This is far more than most commercial pilots, who reported an average income of $76,050 in the same year.
Exercise is also a type of physical activity, but there is the intent and purpose of improving certain aspect of health. Exercise is planned physical activity that leads to visible improvements in health and general well-being.
Muscle activity and exercise may all seem the same, but there is actually two different forms of muscle activity related to exercise. You may have heard the terms aerobic and anaerobic used to describe different forms of exercise. Aerobic exercise refers to endurance exercises such as biking, running or swimming. Anaerobic exercise refers to strength training and weight training. The difference is significant because aerobic and anaerobic muscle activity are fueled by different forms of energy, and have significantly different charactertics.