Which type of exercise should a responder perform to enhance their body's mobility?

The sit-up and reach exercise is effective for enhancing mobility, particularly because it focuses on improving flexibility, which is a crucial component of overall mobility. This movement specifically targets the hamstrings and lower back, helping to increase the range of motion in these areas. Improved flexibility contributes not only to better mobility in daily activities but also helps in preventing injuries.

In contrast, squats and walking lunges primarily focus on strength and stability of the legs and core rather than flexibility. While these exercises do involve some stretch, they do not specifically target the elongation of muscles and tendons in the same way that sit-up and reach does. Push-ups are more concentrated on strengthening the upper body and do not significantly contribute to overall mobility.