The multifunctional portable pneumatic exercise device is a muscular exercise and training device that may be used for a multiplicity of exercises and with a wide variety of muscle groups. An encoding rate setting unit sets an encoding rate s, and an information creating unit sets information including from information Xs,i to information Xz\u22121,i to zero. Such gas exchange is required to release any low oxygen atmosphere and allow for the introduction of oxygen to the packaged meat product, said means for exchanging gases having a gas transmission rate of at least about 50,000 ccm224 hrs. The optical elements may include fibers and lenses. Vgidl can be stepped up until a maximum allowed level, Vgidl_max, is reached.