German Shepherds need regular exercise to stay healthy and happy. As a general guideline, puppies aged 8-12 weeks should have about 5 minutes of exercise per month of age, up to twice daily. For pups between 3-6 months, aim for 15-20 minutes of exercise, 2-3 times a day. As they reach 6-12 months, they’ll need at least 30 minutes to 1 hour of exercise per day.