Which is an important factor to consider when choosing a lifetime physical activity

a. cost

b. efficacy

c. competition

d. all of the above

How do nicotine and tobacco cause cancer? by decreasing blood-sugar levels by damaging or changing a cell's dna by increasing heart rate by increasing phlegm and mucous production

Describe the concept of interval training. what is the benefit of this type of training?

Which respiratory measurement as useful in differentiating between obstructive and restrictive pulmonary dysfunction