A fielder in a game of cricket pulls his hands backwards after taking the catch. This enables the fielder to
Reduce the force exerted by the ball by increasing time of impulse
Force is defined as the rate of change in momentum.
Change in momentum will be there because of the change in velocity.
More is the time in the change in velocity from initial to final, less is the force.
Hence by delaying the time, the fielder manages to get hurt less.