The number of overs a fast bowler should bowl in a day will depend on the skills and fitness level of the bowler. As a general rule, professional bowlers can handle 8-10 overs per day at full speed, while amateur or recreational players may only be able to manage 5-7. Ultimately, how many overs you should bowl depends on how well you can recover between each over; listen to your body, and don’t push yourself too hard!