Which of these is the best method to use when improving skills such as shooting a free throw, jumping rope, or serving a volleyball? A
overload
B
repetition
С
motivation
D
range of motion

Which of the following requires the action of a first class lever in the body

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

What are 3 important public health tools for addressing flu outbreaks and why