Final answer:
An athlete like Lydia who engages in moderate-intensity physical activity should consume approximately 52 to 65 grams of protein daily, based on her weight of 65 kg and recommended protein intake of 0.8 to 1.0 grams per kilogram.
Step-by-step explanation:
Lydia, an athlete who performs moderate-intensity physical activity and weighs 65 kg, should consume at least the recommended amount of protein based on her activity level and weight. According to the Dietary Guidelines complemented by the 2018 Physical Activity Guidelines for Americans, an individual engaged in moderate physical activity requires a balanced intake of nutrients, including protein, to maintain health and muscle mass. For an adult of moderate activity, the general recommendation is 0.8 to 1.0 grams of protein per kilogram of body weight each day. Therefore, Lydia should aim for approximately 52 to 65 grams of protein daily.