The ornamental design for a resistanceband, as shown and described.
FIG. 1 is a perspective view of a resistance band showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a perspective view of the resistance band where the resistance band is in a configuration of use; and,
FIG. 9 is an enlarged view of portion 9 shown in FIG. 1.
The resistance band is shown with a symbolic break in its length and the appearance of any portion of the resistance band between the break lines form no part of the claimed design.