Final answer:
Focusing more on weight training than cardio will be most efficient in helping Julio meet his goal of becoming stronger and more toned.
Step-by-step explanation:
Julio's main fitness goal of becoming stronger and more toned can be achieved by focusing more on weight training than cardio. Weight training exercises, such as lifting weights or using resistance machines, help to increase muscle strength and promote muscle growth. This leads to a stronger and more toned physique. While cardio exercises, such as running or cycling, are beneficial for overall cardiovascular health, they are not as effective in building muscle mass as weight training.
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