Resistance training includes things like weightlifting. When performing this type of exercise, what should we keep in mind about its frequency?
1.High-intensity workouts minimize the need for greater frequency
2.As long as it is done safely, the same muscle groups can be worked daily
3.In order to provide rest, muscle groups should be worked every other day
4.There is no significant difference in the frequency requirements for weight training

[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.

10. what is one long-term effect of tobacco use? changes in brain chemistry coronary heart disease decreased appetite increased heart rate

What are three important public health tools for addressing heart disease? identify the tools, and explain why they are a benefit to public health. you! : )