In the 1970s, American football introduced the 'bump and run' rule, which allowed defensive backs to make contact with receivers before they had a chance to catch the ball.

The introduction of the three-point shot in the 1980s revolutionized basketball, as teams began to focus on shooting from beyond the arc to increase their scoring output.

The change in the substitution rule in the 1970s, which allowed teams to make more substitutions during a match, facilitated the implementation of the 'total football' style, where players could switch positions fluidly.

The ban on the neutral zone trap in the 1990s was intended to open up the ice and create more scoring opportunities by preventing teams from clogging the neutral zone with defensive players.

The increasing use of shifting defense in baseball in the 2000s, where fielders reposition themselves based on batter tendencies, has resulted in more strikeouts and home runs due to hitters trying to pull the ball to avoid being caught by the shift.

The introduction of the power serve in the 1980s, characterized by high ball speed and low trajectory, gave serve-and-volley players a significant advantage and changed the dynamics of the game.

The stroke and distance penalty for hitting the ball out of bounds or into a water hazard was introduced in the 1990s to discourage players from taking excessive risks with their drives.

The increasing use of the attack and counterattack strategy in cycling in the 2010s, where teams take turns attacking and defending, has made races more unpredictable and exciting.

The introduction of the halo device in Formula 1 in the 2000s was a significant safety improvement, as it provides additional protection for drivers' heads in the event of a crash.

The increasing emphasis on leg kicks and takedowns in MMA in the 2010s has added a new dimension to the sport, as fighters aim to weaken their opponents' legs and create opportunities for grappling and submission.

The implementation of the 10-point must system in boxing in the 1980s standardized the scoring criteria and reduced the subjectivity of judges' decisions.

The introduction of the back row attack in volleyball in the 2000s, where back row players can attack the ball above the net, has added a new dimension to the game and made it more dynamic.

The introduction of the tackle height restriction in rugby in the 1990s, which prohibits players from tackling above the shoulders, was a significant safety measure aimed at reducing head and neck injuries.

The introduction of the T20 format in cricket in the 2010s, with its shorter matches and emphasis on big-hitting, has revolutionized the game and led to more aggressive batting and higher scores.

The implementation of the helmet-to-helmet contact ban in American football in the 2000s was a major step towards reducing concussions and improving player safety.