Which aspect is considered important for Soldier readiness in TC 3-22.9?

Maintaining both physical and mental fitness is a crucial element of Soldier readiness as outlined in TC 3-22.9. This aspect is essential because a Soldier's performance on the battlefield relies heavily on their overall health and mental resilience. Physical fitness ensures that Soldiers can meet the demands placed on them, including endurance, strength, and agility, while mental fitness fosters decision-making, stress management, and effective communication under pressure.

In the context of military readiness, comprehensive training programs focus on developing both physical capabilities and mental preparedness, ensuring that Soldiers are equipped to handle not only the physical challenges of their roles but also the psychological demands. The integration of these two components is vital for ensuring that Soldiers can operate effectively in all environments, thus enhancing both individual and unit readiness.