Create a game that requires the use of BOTH underhand and overhand throwing. The game should not already exist, nor should it be a "spin" on an already existing game. Should require players hitting a target (circles . a net, a basket, circles or Xs or a bullseye). The game can be an indoor/outdoor game. It can be a team or individual game.
BE CREATIVE.

look in the comments :)

Explanation:

these are common warning signs of overtraining syndrome:

washed-out feeling, tired, drained, lack of energy

mild leg soreness, general aches, and pains

pain in muscles and joints

sudden drop in performance

insomnia

headaches

decreased immunity (increased number of colds, and sore throats)

decrease in training capacity/intensity

moodiness and irritability

depression

loss of enthusiasm for the sport

decreased appetite

increased incidence of injuries.

a compulsive need to exercise