THE MOST NATURAL ACTIVITY IN THE WORLD WALKING AND GUESS WHAT BRISK WALKING YOU KNOW THE KIND LIKE YOU'RE LATE FOR THE BUS LIKE YOU MIGHT MISS YOUR PLANE THAT KIND OF WALKING WILL GET YOUR PULSE UP IN THE AEROBIC RANGE AND THAT'S WHERE IT NEEDS TO BE BASED ON YOUR AGE DEPENDING ON YOUR AGE YOUR PULSE NEEDS TO BE