Diets and Weight Loss
fitness and exercise
benefits of fitness
- to muscles
- increases muscular strength
- increases muscular endurance
- increases muscle tone
- to heart and blood vessels
- reduces resting heart rate and blood pressure
- increases cardiac stroke volume and cardiac output
- more rapid heart rate recovery following physical activity
- lowers level of fat content in blood
- lower cholesterol, lower triglycerides
- raises HDLs
- to respiratory system
- increase in recovery of oxygen capacity or oxygen debt capacity
- increase in lung capacity
- to body composition
- reduction in body fat
- to mental health
- reduces depression
- relieves stress
- fewer psychosomatic diseases and disorders
- to aging process
- promotes skin elasticity
- fewer chronic diseases
- miscellaneous
- improves quality of sleep and relaxation
- may prevent breast and colon cancer
- improves visual activity
- improves vitality (energy without fatigue)
- better digestion elimination
- fewer physical accidents and injuries
- increases metabolic rate
components of fitness
- muscular strength: the forces a muscle exerts against a resistance
- muscular endurance: the ability to continue using muscular strength
- flexibility: the ability to move the body through a full range of possible motion
- cardiovascular endurance: the ability to sustain vigorous activity that requires increased oxygen intake for an extended period of time
- body composition: the percentage of fat tissue and lean tissue in the body
types of exercise
- isometric: muscles are tightened for 5-10 seconds, no movement
- eg. wall sit, pushing against immovable objects
- isotonic: muscle contraction causing movement
- eg. free weights, push-ups
- aerobic: continuous use of oxygen over an extended period of time
- aerobic: “with air”
- eg. long distance events, “cardio”
- anaerobic: short, fast bursts of energy
- anaerobic: “without air”
- eg. sprinting, quick events with rests in between
fitness and exercise terms
- overweight: a body weight that is 10% or more above the desirable body weight
- obese: a body weight that is 20% or more above the desirable body weight (excess fat)
- calorie: a unit of energy produced by food and used by the body
- caloric expenditure: the number of calories a person uses for digestion and physical activity
- warm up: a period of three to five minutes of easy physical activity intended to prepare muscles to do more work in the actual workout
- eg. stretching, light jogs or walks
- cool down: a period of five to ten minutes of reduced physical activity to help the body return to a non-exercising state
- also eg. stretching, walking
anabolic steroids
- anabolic steroid: a synthetic derivative of the male hormone testosterone
- male effects
- reduction in sperm production
- aggressive behavior
- severe acne
- hair loss
- these effects are usually reversed after steroid use ends
- female effects
- masculine traits appear
- aggressive behavior
- lower voice
- menstruation and ovulation stop
- abnormal growth of hair on face, breasts, and chest
- severe acne
- these effects are not usually reversed after steroid use ends
- long-term effects
- depression
- hypertension
- stunted growth (especially when taken during puberty)
- atherosclerosis (hardening of arteries)
- higher risk of liver cancer
hypertrophy
- hypertrophy: the building of muscle tissue (increasing size and strength of the muscle fiber)
- eg. exercise + protein + carbohydrates = hypertrophy
- exercise
- resistance: increased force used against the completion of a task
- eg. adding weight or distance to an exercise
- repetition: the number of times one completes an exercise
- eg. going from 20 to 40 sit-ups in a set
- recovery: rest period following exercise
- recovery time; also occurs between sets of repetitions
- strength: high resistance + low reps + high recovery time
- endurance: low resistance + high reps + low recovery
- different exercises effect different people, largely variant on their body types
injuries
- strain: an overstretched muscle or tendon
- sprain: a torn ligament
- dislocation: when a bone is removed from its joint
- fracture: a crack in a bone
- closed fracture: no break in the skin
- opened fracture/compound fracture: breaks the skin
- stress fracture: incomplete fracture, caused by repeated stress
- contusion: a deep bruise
- concussion: an injury to the brain that causes disorientation, memory loss, and/or unconsciousness
- often resulting from a blow to the head
- splint: a material or device used to protect and immobilize a body part
diets and weight loss
body types
- endomorph: muscular, stocky, weightlifter
- eg. football/hockey players
- ectomorph: long-boned, lean, marathon runner
- eg. cross country runner
- mesomorph: average build, usually higher percentage of body fat
- most common body type