Which of the following is an effective way to improve an athlete's flexibility?

Incorporating static stretching into an athlete's routine is an effective way to improve flexibility because it specifically targets muscle groups to enhance their length and elasticity. Static stretching involves gradually elongating a muscle to its fullest extent and holding that position for a period of time, which can help increase the overall range of motion. When done consistently, static stretching can lead to improvements in flexibility, allowing athletes to perform movements more efficiently and with a reduced risk of injury.

While engaging in regular weight training can contribute to overall fitness and support muscle strength, it does not primarily focus on increasing flexibility. Limiting range of motion exercises, on the other hand, would impede flexibility rather than enhance it. Focusing exclusively on strength training ignores the essential balance between strength and flexibility that is vital for optimal athletic performance. Therefore, incorporating static stretching stands out as the most effective approach for specifically improving flexibility.