Twenty20 cricket is a shortened game format of cricket. Regardless of a player's role on the team, Twenty20 had "raised the bar" in terms of fitness standards for all players by requiring better levels of strength, speed, agility, and reaction time.

Although numerous important commentators, including Adam Gilchrist, have praised the Twenty20 format as a better, faster, and more financially feasible manner of promoting the game of cricket around the world, the format has been criticized by other famous cricketers. Some of the impacts of this format on the game of cricket are: 

1. Former Australian captain Ricky Ponting has blamed Twenty20 cricket for harming Test cricket and impairing batsmen's scoring skills and concentration.
2. Former Australian captain Greg Chappell had similar concerns, saying that young players might play too much T20 and not fully develop their batting skills.
3. Former England player feared that bowlers playing only Twenty20 format many not develop bowling skills fully.
4. Former West Indies captains Clive Lloyd, Michael Holding, and Garfield Sobers criticized Twenty20 for its role in discouraging players from playing for their country's test cricket team and instead play in a Twenty20 franchise cricket elsewhere in the world to make more money.

In summary, Twenty20 format had both positive and negative effects on the overall game of cricket.