Chapter 3 lesson 2 Benefits to Physical fitness Nervous system – Improve reaction time Respiratory System – With regular exercise system begins to work more slowly & efficiently Lung capacity increases – don’t lose breath as quickly when running Circulatory system – Strengthens the heart Blood pumps more efficiently More work with less effort

Exercise and weight control 1 of 3 American adults 1 in 5 American teens Are overweight or obese Sedentary lifestyle – little movement or exercise

Your Metabolism Problem of being overweight is related to two Concepts Metabolism –process by which your body gets energy from food Basal Metabolism – minimum amount of energy required to maintain the life processes in a body

Your Metabolism You get energy from your food, the energy value of food is measured in units of heat called Calories When exercise your metabolic rate increases and you burn more calories

Your weight If you take in fewer calories than you burn you lose weight If you take in more calories than you burn you gain weight 3,500 calories =1 pound Every extra 3,500 calories taken in equals and extra pound you carry

Benefits to M/E Health Relax tension Sleep better Increase creativity Outlet for tension, stress, anger Contributes to positive self esteem

Benefits to Social health Helps to relieve stress in relationships More likely to get out and meet new people

Improving Cardiorespiratory Endurance Aerobic Exercise – vigorous activity which oxygen is continuously taken in for a periods of a least 20 minutes Recommend 30 minutes 5 days a week Heart rate increases sending more oxygen to the muscles to be used as energy to do more work Distance runners

Improving Cardiorespiratory Endurance Anaerobic Exercise – Intense bursts of activity in which the muscles work so hard that they produce energy without using oxygen 100 meter dash

Other forms of Exercises Isometric – activity that uses muscle tension to improve muscular strength Muscles against muscles Isotonic – Combines muscle contraction with repeated movement Lifting Weights Isokinetic – Involves resistance through an entire range of motion Hydraulic levers