SPICE kernel file contents are summarized below. S- Spacecraft ephemeris, given as a function of time. The P kernel also logically includes certain physical, dynamical and cartographic constants for target bodies, such as size and shape specifications, and orientation of the spin axis and prime meridian.
Chronic muscle strains are the result of repetitive movement. This can be due to: 1  sports like rowing, tennis, golf, or baseball. 2  holding your back or neck in an awkward position for long periods of time, such as when you work at a desk.ou can decrease your chances of straining a muscle if you take some basic precautions. 1  Try not to sit in one position for too long. 2  Take frequent breaks to move and change position. 3  Use a chair that provides good support for your lower back or use a pillow for support. 4  Try to keep your knees level with your hips.
The strain that causes overuse syndrome occurs when a body part is called on to work harder, stretch farther, impact more directly, or otherwise function at a greater level then it is capable of handling. The affecting impact may be insignificant, but when it occurs repeatedly the constant straining can cause damage. The term overuse syndrome identifies a large group of conditions that result from using the body in a repetitive way, causing injury from the amount of cumulative stress. These conditions are often focused on a joint and usually affect the muscle, bone, tendon or bursa of the joint.