Exercise 1

INTRODUCTION TO FITNESS AND WELLNESS

DEFINITION OF PHYSICAL FITNESS

  • Being physically fit is critical for overall health, characterized by:

    • The ability to move with ease and balance.

    • Having endurance with long-lasting energy.

    • Exhibiting strength to meet daily physical challenges without strain.

COMPONENTS OF PHYSICAL FITNESS

  • Physical fitness encompasses various components, relevant to general health and specific skills or sports. Five crucial components for overall health include:

    1. Cardiovascular Endurance:

    • Also known as cardiorespiratory endurance or aerobic fitness.

    • Defined as the body’s ability to deliver oxygen and nutrients to vital organs to sustain prolonged exercise.

    • Essential for every tissue's oxygen demand, especially during exercise.

    • Trained heart can better manage exercise demands, reducing risk of coronary heart disease, the leading cause of death in the U.S.

    1. Muscular Strength:

    • The maximum amount of force a muscle can produce in a single effort.

    1. Muscular Endurance:

    • The ability of a muscle to exert submaximal force repeatedly over time.

    • For example, strength determines how much weight can be lifted once, while endurance identifies how many times it can be lifted.

    • Benefits include improved muscle mass, bone density, reduced injury risk, better body composition, increased posture, and reduction of low back pain.

    1. Flexibility:

    • Defined as a joint’s ability to move through a full range of motion.

    • Important for posture, injury prevention, and overall fitness; often neglected in workout routines.

    1. Body Composition:

    • The ratio of body fat to lean body tissue (muscle, bone, organs, and water).

    • Relevant to health since an excess of body fat is linked to many health issues, including cardiovascular disease, diabetes, and certain cancers.

FIVE COMPONENTS OF FITNESS

  • The five essential components include:

    • Cardiovascular endurance.

    • Muscular strength.

    • Muscular endurance.

    • Flexibility.

    • Body composition.

BENEFITS OF IMPROVED PHYSICAL FITNESS

  • Benefits of enhanced physical fitness include:

    • Improved VO2 max (heart and circulatory efficiency).

    • Decreased blood pressure and resting heart rate.

    • Increased blood volume, metabolism, and energy levels.

    • Improved body composition and bone density.

    • Decreased LDL cholesterol; increased HDL levels.

    • Enhanced self-esteem and reduced incidence of depression.

    • Lower stress levels and increased endorphin output.

    • Enhanced immune system function.

    • Prevention of osteoporosis and low back pain.

    • Better posture and reduced risks for chronic diseases.

    • Slowing of aging effects.

GUIDELINES FOR IMPROVING PHYSICAL FITNESS

  • Basic guidelines for enhancing fitness across different components are provided.

PRINCIPLES OF CARDIOVASCULAR FITNESS

DEFINITION

  • Cardiovascular fitness is the ability to deliver oxygen and nutrients to vital organs for sustaining prolonged exercise, akin to a vehicle’s gas mileage.

AEROBIC VS ANAEROBIC EXERCISE

  • Aerobic Exercise:

    • Involves continuous exercise lasting longer than two minutes using large muscle groups (e.g., jogging, cycling).

  • Anaerobic Exercise:

    • Involves short bursts of high-intensity effort lasting up to two minutes (e.g., weight training, sprinting).

THE FITT PRINCIPLE FOR AEROBIC FITNESS

  1. Frequency:

    • Number of exercise bouts per week recommended: 3-5 days.

  2. Intensity:

    • To achieve training effects, overload the cardiovascular system to 60-85% of maximum heart rate (MHR).

    • MHR calculated as 220 - ext{age}

    • Target Heart Rate Range (THR) is given by: ext{MHR} imes 0.6 to ext{MHR} imes 0.85 (reported in beats per minute).

  3. Time:

    • Duration of exercise should be within THR, recommended at 20-40 minutes.

    • Should include a 5-10 min warm-up and cool-down.

  4. Type:

    • The activity should primarily be aerobic and enjoyable.

TABLE 2-1: Calories Used by a 150-lb Person (68 kg)

  • Activity & Calories Burned Per Hour:

    • Bicycling (10 mph): 420

    • Bowling: 270

    • Ice Skating (leisurely): 300

    • Jumping Rope: 750

    • Mountain Climbing: 600

    • Playing Golf: 270

    • Playing Pool: 120

    • Racquetball: 540

    • Running (7.5 mph): 750

    • Sitting: 100

    • Sleeping: 80

    • Snowshoeing (3 mph): 360

    • Standing: 140

    • Swimming (recreational): 600

    • Walking on Level ground: 360

    • Walking Up Stairs: 1050

    • Water Skiing: 390

PRINCIPLES OF MUSCULAR ENDURANCE

DEFINITION

  • Muscular Strength: Maximum force a muscle can produce in one effort.

  • Muscular Endurance: The capacity of a muscle to exert a submaximal force repeatedly over time.

BASIC PRINCIPLES

  1. Overload Principle:

    • To evoke physiological adaptations, muscles need to contract near maximum tension.

  2. Progressive Resistance:

    • As strength improves