The only time LSD (long slow distance) is necessary is if your going to compete in a sport that requires it.
It is far inferior to CrossFit-type metcon for producing an increase in VO2 max, it interferes with power and strength production, it can be quite catabolic and immune-suppressive in high doses, it destroys muscle mass, and the people that do it usually wear silly clothes.
Read the stuff on the CrossFit website regarding this, and you will learn many good, important things.
It is far inferior to CrossFit-type metcon for producing an increase in VO2 max, it interferes with power and strength production, it can be quite catabolic and immune-suppressive in high doses, it destroys muscle mass, and the people that do it usually wear silly clothes.
Read the stuff on the CrossFit website regarding this, and you will learn many good, important things.
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