4. critical thinking: da vinci wrote: "he who runs down a slope
has his axis on his heels; and he who runs uphill has it on the
toes of his feet; and a man running on level ground has it first
on his heels an then on the toes of his feet.” what is he
talking about?

The average resting heart rate (hrrest) for a 34 year old is 73 beats per minute2. 34 year old males average heart rates of 71 bpm while females average slightly higher at 76 bpm2. the normal resting heart rate range for all adults and children 10 and over is between 60 and 100 beats per minute3. 90% of 34 year olds resting pulses fall within the range of 54 to 92 bpm. in general, an adult's resting heart rate will be lower for those in better athletic condition.