physics of gyming

goldevil SG

assumed assisted chin and dips ,

since it's a pully system like all cable operated gym machines , am i right to say that it does not mean that the weight chosen will be subtracted from ur bodyweight ?

lets say u chose 50 kg and u weight 70 kg , it does nt mean u lift 20 kg up right ?

my JC frenz told me it's a pulley so it does nt mean u pull 20 kg up .

friction and the fact it's a pulley must be taken into acct .

like lat pulldown , u pull 70 kg down but taking acct pulley system is easily pulled up than free weights like dumbells or barbells .

i can do biceps curl using cables singlehandedly ( 35 kg ) but i could only managed 15 kg dumbbell .

so r free weights better than cables ?

i dun really like cables .

mhcampboy SG

Not all members of SAF go to gyms... Laughing

You should go PUMPING IRON forum...

Simon Dean SG

If you can lat pulldown 70kg and you are 70kg.It DOESNT ALWAYS mean that you can do the same number of chin ups as the lat pulldown of that weight.

and why are you doing curls for?its the most useless exercise for gaining strength.

Free-weights will always be better than machines.

goldevil SG

yeah , i agree .

I never do cable curls , i do barbells and dumbbells after i learnt abt the truth of cable stuff .

thats y i learnt too .

cos cable mah , we use less force to pull down .

then wad abt assisted ones , does a counterweight of 20 kg equal to 20 kg assistance ?

i think the assistance is less than 20 kg cos it's a pulley system plus some force will be lost through friction .

thats y assisted pullups have only 15 kg of assistance instead of single digit .

ispyyy SG

lol...

1) Under ideal condition, work done = force x distance
2) Energy cannot be created nor destroy... it can only be change from one form to another

And hence, weight m/c is designed to increase many parts of muscle... if u r doing for the look, it is best to use weight m/c. if u r over graft pull up, it is also best to use weight m/c
while training done by weights increases a certain part of muscle.. for lazy people like me to do undergraft pull up, training bi ceps..

what exercise increase what muscle ... I never pay attention at all... who cares??? as long as, I can pass the ippt...