Which exercise is NOT typically suitable for clients with knee issues?

Jumping jacks are not typically suitable for clients with knee issues due to the impact and strain they place on the joints. This exercise involves jumping and landing, which can exacerbate knee pain or discomfort, especially in those with existing knee problems. The rapid changes in direction and the high-impact nature of jumping jacks can lead to increased stress on the knee, making them a challenging choice for individuals who are managing knee-related concerns.

In contrast, halfway-down chair squats, wall sits, and resistance band leg lifts are exercises that tend to be more gentle on the knees. These options promote strength and stability without the added stress of jumping or rapid movements. They focus on controlled movements and can be adjusted to accommodate the individual's range of motion and comfort level, making them more appropriate for clients with knee issues.