3. Why?: Greater Range of Flexibility Makes your joints more flexible Example: A free weight exercise, the barbell pullover, only provides resistance over 100 degrees Same weight machine exercise provides 260 degrees of resistance, stretching your muscles further.
4. Why?: Time Exercise machines are much easier to change weights than free weights and require less time Free weights require you to adjust both sides of a the barbell with multiple weights. Hit the gym and get going fast!
5. References Hoeger, Sharon A., and Werner W. K. Hoeger. Lifetime Physical Fitness & Wellness: A Personalized Program. 11th ed. Belmont: Cengage Learning, 2011. 223-224. Print. To get more information on free weights and weight machines, purchase the book online here