FIG. 1 is a front view of an exercise block according to a first embodiment of the design;
FIG. 2 is a rear view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a right side perspective view thereof;
FIG. 8 is a left side perspective view thereof;
FIG. 9 is a right side view thereof shown in an environment of use;
FIG. 10 is a rear view thereof shown in an environment of use;
FIG. 11 is a front view of an exercise block according to a second embodiment of the design;
FIG. 12 is a rear view thereof;
FIG. 13 is a right side view thereof;
FIG. 14 is a left side view thereof;
FIG. 15 is a top view thereof;
FIG. 16 is a bottom view thereof;
FIG. 17 is a right side perspective view thereof;
FIG. 18 is a left side perspective view thereof;
FIG. 19 is a right side view thereof shown in an environment of use; and,
FIG. 20 is a rear view thereof shown in an environment of use.
The portions of the exercise block shown in dash-dash broken lines in FIGS. 1-10 do not form part of the claimed design. The dash-dash broken line showing of the person and mat in FIGS. 9-10 and 19-20 is for the purpose of illustrating portions of the environmental structure and forms no part of the claimed design. The dot-dash broken lines shown on the front and back of the exercise block in FIGS. 1-2, 7-8, and 10 are for illustrating the boundary of the design only and do not form part of the claimed design.