Random thoughts: 1) Pulling is generally easier than pushing. Perhaps this could be helpful in designing a variation. 2) Turn shoveling into a game. Perha

Random thoughts: 1) Pulling is generally easier than pushing. Perhaps this could be helpful in designing a variation. 2) Turn shoveling into a game. Perhaps a small lcd display that keeps track of how many pounds you shoveled, how many calories burned, time spent. Or you could have challenges - eg, shovel 10 times in the next 20 seconds. etc. 3) Could you use an accelerometer to determine if the shoveler had bad posture?