A shirt for improving a swinging motion of a user wearing the shirt includes front and rear panels each having corresponding top, bottom and generally opposing side edges, wherein the front and rear panels are adjoined to each other by the top and side edges, defining an interior space of the shirt. A current limit control circuit limits current supplied by the source to the load in accord with a programmed current limit. If such information is present, a check is made from the number of slots in the in the volume control information and the updating amount count value in the update information in order to ascertain whether or not the proportion of the updating amount relative to the number of slots is equal to or greater than the threshold value in the threshold value control information. , interwoven with the absorbent pad material or positioned to form one or more sensor layers between layers of absorbent material. 0 to about 29 wt % magnesium, wherein at least 75 wt % of the magnesium content is substituted for calcium ions in the hydroxyapatite lattice structure. Signals are conveyed over an interconnecting bus between the transformer devices, thereby eliminating or reducing interference.