Age and life stage
Puppies have less endurance and developing bodies, so several short walks or play sessions are generally safer than one prolonged outing. The commonly repeated five-minutes-per-month rule is not supported by scientific evidence and may be too much for some puppies and too little for others. Favor varied, low-impact movement at the puppy's pace and ask your veterinarian when public walks are appropriate based on vaccination status.
Healthy adult dogs can usually build duration gradually. Senior dogs still benefit from movement and outdoor enrichment, but they may need a slower pace, predictable footing, and more frequent rests.
