Related Clues:

• Military capability
• Bodybuilder's goal
• Vigour
• Forcefulness
• Brawn, muscle power.
• Life force and animation
• Physical might, muscle
• Force, might, potency
• Physical potency
• Physical or mental capacity
• Toughness, force
• Physical capacity
• Physical power
• Vibrancy, energy
• That's not for the week, by the sound of it