The ornamental design for a sportstrainingdevice, as shown and described.
FIG. 1 is a side perspective view of the sports training device viewed from the right side and above a longitudinal plane in which the sports training device lies, wherein the opposite side perspective view is a mirror image thereof.
FIG. 2 is a side perspective view of the sports training device shown in FIG. 1 viewed from the left side and below the longitudinal plane in which the sports training device lies, wherein the opposite side perspective view is a mirror image thereof.
FIG. 3 is the side perspective view shown in FIG. 1 with one side of the sports training device detached from the second side; and,
FIG. 4 is the side perspective view shown in FIG. 2 with one side of the sports training device detached from the second side.
The broken lines shown in the drawings illustrate portions of the sports training device that forms no part of the claimed design.