The answer to this question depends on your body weight and physical fitness. For instance, a 6'5", 250-pound man wouldn't want to carry 70 pounds of weight. A woman would be happy carrying half her body weight. For those who feel uncomfortable carrying a backpack, 20-30 pounds of weight is the recommended weight range. Regardless of your body type, you should keep a few things in mind to keep the weight low and your back healthy.