2.4 In this chapter you must understand the impact of a healthy, active lifestyle on your muscular system.

Role of the muscular system during physical activity:
Major muscle groups that benefit from particular types of physical activity (deltoid, trapezius, latissimus dorsi, pectorals, biceps, triceps, abdominals, quadriceps, hamstrings, gluteals, gastrocnemius)

Role of muscles in movement (agonist and antagonist)


Immediate and short-term effects of participation in exercise and physical activity (isometric and isotonic contractions, responses – increased fuel/energy demands, lactic acid, muscle fatigue)


Effects of regular participation in – and long-term effects of participation in – exercise and physical activity (adaptations – increased strength and size/hypertrophy)


The potential for injuries such as muscle strain and muscle atrophy (due to injury and inactivity), and their treatment using common techniques


Rest (rest required for adaptation to take place, time for recovery before next exercise session)

Diet (effects of protein in building and repairing muscles)

Performance enhancing drugs (use of steroids to aid muscle building and recovery).