17) The exercise that benefits most in the reduction of developing osteoporosis is Group of answer choices A) weight lifting. B) running. C) walking. D) swimming. Flag question: Question 18 Question 181 pts 18) The FITT principle stands for Group of answer choices A) frequency, intensity, training and type. B) frequency, intensity, time and type. C) flexibility, interacting with training and time. D) four components, increasing, to tone and treat illness. Flag question: Question 19 Question 191 pts 19) Intensity of training refers to Group of answer choices A) the time you're spending exercising. B) the number of days a week you're exercising. C) the type of training you're doing. D) the effort you put into exercising