with the ground (single limb stance), the center of mass is in front of that foot and moving towards the leg that is in the swing phase. Skip Skipping is a gait children display when they are about four to five years old. While a jog is similar to a horse's trot, the skip is closer to the bipedal equivalent of a horse's canter. In order to investigate the gait strategies likely to be favored at low gravity, a study by Ackermann and Van Den Bogert ran a series of predictive, computational simulations of gait using a physiological model of the musculoskeletal system, without assuming any particular type of gait. They used a computationally efficient optimization strategy, allowing for multiple simulations. Their results reveal skipping as more efficient and less fatiguing than walking or running and suggest the existence of a walk-skip rather than a walk-run transition at low gravity. Gait patterns in children Time and distance parameters of gait patterns are dependent on a child's age. Different age leads to different step speed and timing. Arm swinging slows when the speed of walking is increased. Height of a child plays a significant role in stride distance and speed. The taller the child is the longer the stride will be and the further the step will be. Gait patterns are velocity and age dependent. For example, as age increased so did velocity. Meanwhile, as age increases, cadence (rate at which someone walks that is measured in steps per minute) of the gait pattern decreased. Physical attributes such as height, weight, and even head circumference can also play a role in gait patterns in children. Environmental and emotional status also play a role in with speed, velocity, and gait patterns that a child uses. Besides, children of different genders will have different rates of gait development. Significant developmental changes in gait parameters such as stride time, swing time, and cadence occur in a child's gait two months after the onset of independent walking, possibly due to an increase in postural control at this point of development. By the age of three, most children have mastered the basic principles of walking, consistent with that of adults. Age is not the only deciding factor in gait development. Gender differences have been seen in young children as early as three years old. Girls tend to have a more stable gait than boys between the