CrossFit is a core strength and conditioning program designed to elicit as broad an adaptational response as possible. It is not a specialized fitness program, but a deliberate attempt to optimize physical competence in all ten areas of fitness: Endurance · Stamina · Strength · Power · Speed · Flexibility · Coordination · Agility · Balance · Accuracy
The only acceptable way to jump in weightlifting is backwards. If the weight of the bar pulls us forward we tend to miss the lift. Reaching full extension as shown in the picture above allows us to receive the bar directly over our center of mass.
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