For a 55-year-old adult, the daily exercise needs to be determined according to his physical condition and health goals. According to the principle of "1357" put forward by health care experts in China, the best exercise for the elderly over 50 years old is 30 to 60 minutes of moderate intensity exercise every day.

Jogging 5 kilometers in the morning and swimming 700 meters at noon are already quite a lot of exercise. If a person is in good health, such exercise may be beneficial, but if there are potential health problems or poor physical fitness, it may cause excessive fatigue or other negative effects.

Therefore, it is suggested that before starting a new exercise plan, you should consult a doctor or fitness coach to understand your physical condition and health goals, and then make an exercise plan that suits you according to your personal situation. At the same time, pay attention to warm-up and stretching before and after exercise to avoid sports injuries.