The body’s ability to supply oxygen and blood to the working muscles during exercise is

Fats contain how much more energy than carbohydrates and protein?

Measuring your progress by weight (only)? a: the fit of your clothes b: bathroom scale c: body fat scale d: body fat caliper

Which of these is most likely to prevent pregnancy? a. tracking of female body temperature to identify ovulation times b. proper condom use c. male withdrawal before ejaculation d. proper spermicide use