Strength is the most important motor ability in sports as it is a direct product of muscle contraction. We can define strength as "Ability to overcome resistance" and this resistance is of four types :
(i) own body resistance, e.g., 100 m race, jumping.
(ii) resistance of implement, e.g., throwing events like shot, javelin and discus.
(iii) resistance of opponent, e.g., wrestling, boxing, judo, etc.
(iv) frictional resistance, e.g., cycling, swimming.
Circuit training programme for upper body strength. Other exercises for development of strength in upper body can be :
(i) Over head press
(ii) Pushing against a wall
(iv) Shuttle run
(v) Leg raise (13 cm above ground)
(vi) Back raise
(vii) Chest press
(viii) Shoulder shrug etc.