It is false that when lifting free weights, if you know the lift well you do not need to use a spotter.
Weightlifting is a power based workout as well as a sports activity where heavy barbells are lifted.
Spotters are the people who support and guide other person during intense workout so as to protect them form any probable injury or look after their correct posture and way of exercise. A spotter is necessary even for a person who knows how to lift weights because spotters not only protect but also watch out the correct form of exercising, so that the exercise turns out to be more effective.
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