How frequently should you participate in vigorous intensity activities to meet the cardiorespiratory endurance recommendations?

Would you rather know how you die or when you die.i want a pretty good answer that makes sense.or ill report you.lol kidding

Which example is a indication of stress a. becoming more alert b. narrowing air passages c. slowing down if the heartbeat d. decreasing blood sugar with adrenaline

True or false a fertilized cell divides many times to form an embryo