Muscle contractions involve tightening, shortening, or lengthening of muscles during activity
Types of muscle contractions include the "lifting phase" where force is produced and the muscle is shortened, "deceleration phase" where force is reduced and the muscle is lengthened, and "pausing in between the concentric and eccentric" with no visible movement
Breathing during exercise involves inhaling deeply through the nose and exhaling through the mouth with a long "ha" sound
Bracing technique involves laying on your back, taking a deep breath to fill your stomach with air, squeezing your stomach as if preparing to be punched, and tensing your lower back
Principles of training guide in selecting the correct training type and method to improve performance
Principles of training include Overload, Specificity, Progression, Reversibility, and Tedious
Overload means doing more than you normally do, not something new, and can be accomplished by increasing time, intensity, or frequency of exercise
Principle of Progression involves slowly applying stress to the body, bones, and muscles, increasing progression slowly, especially at the beginning of a workout program
Principle of Specificity involves specific exercises that improve specific components of physical fitness in specific areas
Principle of Reversibility states that if you stop exercising or using your muscles, they will become weak
To avoid becoming "tedious," include a variety of activities to keep muscles energized
BMI (Body Mass Index) is a measurement of a person's weight with respect to their height
If answered "YES" to questions in the PAR-Q (Physical Activity Readiness Questionnaire), consult a physician before engaging in physical activity
Common sense is the best guide when answering questions in the PAR-Q