Here's an interesting tracing page for the kids, featuring a weightlifter! Trace the dotted lines for some excellent pencil control practice, then you can colour in the finished result!
Trace over the dotted lines on this tennis player tracing page and create a picture. Younger children can trace between the dotted lines; older children directly on them.
Here's a fun tracing activity for summer or a sports theme. Trace the dotted lines of this swimmer sat by the side of the pool. Younger children can trace in the "channels", more confident children directly on the lines.