Your personal trainer at Catania
result in terrorism but espousing the cause of common sense, my advice as regards the fitness room is to always give priority to the naturalness of gesture always choosing the slow forward.
Usually the gym environment and 'populated by individuals without any competitive ambitions to choose exercises that go to echo the daily gesture functionality is always the best choice, because a human being hardly raise an object over your head starting from behind the leader.
We must also say that there is no tangible evidence that the slow behind have an advantage in terms of muscle activation compared to the more natural as the slow forward, then going to confirm the conclusion that the slow base is definitely moving forward more natural and the same functional and active musculature obtaining same aesthetic results than slow behind. An 'other characteristic is not insignificant is the respect of the articular physiology that would be obtained in the case of press forward.
In some cases, however, if we want to force the exercise with a slow behind we need to ensure first and foremost that the subject in question has a good joint mobility especially in external rotation. The choice of this year will be driven more by a personal taste that the actual muscle benefit.