Chapter 18 Growth, Development, and Exercise in Children and Adolescents.

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Presentation transcript:

Chapter 18 Growth, Development, and Exercise in Children and Adolescents

Key Concepts

acute musculoskeletal injuriesacute musculoskeletal injuries adolescence body building childhood chronic musculoskeletal injurieschronic musculoskeletal injuries development epiphyseal growth plate growth infancy making weight maturation mean power peak height velocity peak power peak weight velocity puberty Tanner scale weight lifting weight training

Review Questions

Why is it important to be able to recognize the onset of puberty? Normal growth patterns and responses to exercise training are substantially different in children than in adolescents

How do you use height and body weight data to identify the adolescent growth spurt? Examine the yearly change in height or body weight as a function of age Dramatic increases in height and body weight coincide with the onset of puberty Increases change from around 5 cm per year to 10 cm per year for height and 3 kg per year to 10 kg per year for weight

According to Bouchard and Malina, what effect does exercise have on normal growth and development patterns of children? None. It does not appear to either accelerate or decelerate growth and maturation.

What effect does exercise have on body composition in children and adolescents? Results in lower levels of percent body fat and fat weight and produces more fat-free weight

Describe the normal developmental patterns of absolute VO 2 max during childhood and adolescence for males and females. Males: –childhood: –adolescence: Females: –childhood: –adolescence: increase throughout continue to increase increase throughout level off at about age 14

What accounts for the increase of VO 2 max during childhood? It is a function of growth in the lungs, circulatory system, and musculature.

Why is making weight a bad idea for adolescent athletes? Attempts to make weight often involve drastic changes in caloric intake and water metabolism, which can cause changes in kidney and cardiovascular function.

What are some hazards associated with long-distance running for children? Heel cord injuries Epiphyseal growth plate injuries Chronic joint trauma Thermal intolerance Psychological problems from unrealistic goals

What are the metabolic adaptations associated with anaerobic training in children and adolescents? Increased: –phosphofructokinase –myosin ATPase –creatine phosphokinase –myokinase –stores and rate of utilization of ATP, CP, and glycogen

What factors should you consider when planning an anaerobic training program for children? Training program should closely mimic the intended sporting activity with respect to the mode of exercise as well as the metabolic demands. Training protocol should include repetitions that tax the appropriate anaerobic system, whether phosphagens or gylcolysis.

What are some benefits associated with strength training for prepubescent children? Improved flexibility Favorable changes in blood lipid profiles Enhanced bone and connective tissue development Favorable changes in body composition Reduced musculoskeletal injuries during sports participation Improved motor skills Increased muscular endurance Positive psychological effects

What are the likely explanations for strength increases in response to resistance training in prepubescent children? Primarily neural adaptations Possibly hypertrophy

What are some hazards associated with strength training for children and adolescents? Acute musculoskeletal injuries such as ruptured disks and damage to the epiphyseal growth plate Chronic musculoskeletal injuries such as stress fractures and strains

Summarize the American Academy of Pediatrics’ recommendations for resistance training for children and adolescents. The program should be conducted by well- trained adults who are qualified to plan programs appropriate to the age of the participant. Weight lifting, power lifting, body building, and the use of maximal amounts of weight in strength training should be avoided until the participant has reached Tanner Stage 5 maturity.

Useful Websites

Physical Fitness and Activity in Schools American Academy of Pediatrics ACSM Current Comment—Preseason Conditioning for Young Athletes Strength Training for Children cfm