The ornamental design for a muscletensiontherapeuticdevice, substantially as shown and described.
FIG. 1 is a side perspective view of a muscle tension therapeutic device in accordance with the present invention.
FIG. 2 is a top view thereof.
FIG. 3 is a bottom view thereof.
FIG. 4 is a left view thereof.
FIG. 5 is a right view thereof
FIG. 6 is a front view thereof; and,
FIG. 7 is a back view thereof.
The broken lines in FIGS. 1-3 depicting 5 raised channels for the screws and the broken lines in FIGS. 4-7 depicting screw holes are for environmental purposes only and form no a part of the claimed design.