Fitness Definition of fitness

Fitness

Definition of fitness

Definition - Fitness: the capacity to carry out everyday activities without excessive fatigue and yet have sufficient energy in
reserve to cope with emergencies and to enjoy active leisure pursuits.

COMPONENTS OF FITNESS

• Health Related
• Cardiovaseular enduranee

{aerobie eapaeity)

• museular strength
• loeal museular enduranee
• Anaerobie power

{assoeiated with speed)

• flexibility
• body eomposition

• Skill Related
• Museular power
• agility
• speed
• balanee
• Coordination
• Reaetion time

MUSCULAR STRENGTH

8!:lDefinition: the force that a muscle / group of muscles can exert against a resistance in a single contraction (1RM)

• Activities that require strength:

o1 jostling for position
o1 A rugby serum
o1 field events / throwing
o1 weight lifting

Factors affecting the application of strength:

• Recruitment (motor un1ts)- how many have

received the electrical impulse to contract. Governed by the strength of the impulse from the brain.

• Cross sectional area - the larger the CSA the greater the strength (a direct linear relationship)
• Joint angle and muscle length - greater strength 120 degrees
• Fibre types - FT have greater strength than

ST

Factors affecting the application of strength:

• Age and gender of the person - males ore generally stronger than females, as they have a larger CSA and higher Ievels of

testosterone. Strength peaks between 20-
30.

• Speed of contraction - the slower the muscle contracts the more force it can generate.
• Muscle shape and location - muscle fibre arrangement: pennate arrangements generate more force than fus1form.

Arm flexor strength (kilograms)
30
25
20
15
10
5