The wicket keeper is an essential and key part of the cricket team. Every team needs a reliable wicket keeper. As well as taking catches, stumping the batsmen and taking run outs, the wicket keeper is one of the team's most important players: motivating and inspiring the bowlers and fielders to raise their game and WIN.
To be a wicket keeper you need fast reactions and precise judgement as you have very little time to react to such things as fast deliveries especially if there are changes and deviations in the balls line due to variations in swing, movement off the pitch and edges.
You need to be alert and have high levels of concentration. Like a top batsmen you want to be able to 'switch on and off' your concentration between deliveries and overs to avoid getting mentally tired, as it's impossible to fully concentrate non-stop for hours at a time.
High levels of fitness and flexibility are also very important for a wicket keeper as it can be very tiring because you are effectively doing hundreds of squats and diving around the field. So stay fit, warm up and down and stretch thoroughly to remain in peak condition and avoid injury.