Vito, at four miles a day, you're not at risk for depleting glycogen unless you really restrict your carbs.
That 4:1 ratio was likely determined for high mileage athletes. Plus their high calorie intake overall will provide more than enough protein.
On 3000-4000 calories a day, even 25% protein will mean 187-250 grams which is higher than typical for endurance athletes.
"To give anything less than your best is to sacrifice the Gift."