Puzzle time#2 - 95% people can't solve this !!

I bet you will enjoy solving this puzzle.

Two people have their own horses. One day both had a horse riding completion but with a twisting bet. Person whose horse will be last in the race competition will be winner and will give $1000 to person whose horse comes first :D

The race started by riding their own horses but as expected they were running very very very slow to be in last.

A man, saw them and was confused. If they have healthy horses why they are running very slow. Hmmm something is not good here. He asked what's the matter.

After listening their betting, the man paused for a while. Then said, if you ride like this your race will finish in a week. So, let's do the TRICK I am saying.

After the trick, both man in competition started riding very fast to be at 1st place.

Now, guess the trick.

Here, bet is not changed at all.

Note: Please up vote if you solved the puzzle and comment your answer.