What is likely to occur when fatigue sets in for a client?

When fatigue sets in for a client, it is likely that movement compensations occur. Fatigue impairs the body's ability to perform movements with the same level of efficiency and control as when fully rested. This decline in performance can lead individuals to unconsciously alter their movement patterns in an effort to complete an exercise or activity, which may include using different muscle groups or altering their posture.

These compensations arise as the central nervous system struggles to maintain stability and coordination under fatigue. For example, if the glutes are fatigued during a squat, a client might unconsciously shift the load to their lower back or knees, which can lead to improper form and increase the risk of injury. Recognizing these compensations is crucial for trainers and specialists, as they indicate the need for modifications in exercise prescription or adjustments in technique to ensure safety and effectiveness.

The other options do not align with what typically happens when a client experiences fatigue. Increased focus and enhanced performance are generally associated with rest and optimal energy levels rather than fatigued states. Similarly, improved coordination tends to diminish with fatigue, as the ability to control movements effectively often declines.