Its best to perform your negatives slowly as studies show negatives promote
maximum micro trauma and thereby more stress.
More contractions mean
more micro trauma (microscopic tears in muscle fibers) and an increased metabolic rate.
Or a series
of micro traumas may occur over a span of time that has a cumulative effect.
When you control the negative, you will both minimize the chances of getting injured and create
greater micro trauma in your muscle fibers, which will lead to increased muscle growth.
Icing causes vasoconstriction helping to reduce inflammation around the
muscle micro traumas caused by DOMS.
Jumping in and out of cars, jerking at the leash and riding in a car with sudden starts and stops are examples
of micro traumas.
Eccentric contractions in unprepared muscles can cause
micro traumas to the muscle that result in soreness.