Pullups are different, open chain exercises produce more of an anabolic hormonal response.
I dont think that chins and pulldowns are different kinetically though.
Are you sure about that? I cant think of any reason why open change would lead to more of an anabolic hormonal response, and they are kinetically different; not as much as the difference between leg press and squats though.
To the OP,
Heres a couple of thoughts.
*If you want to get better at chins, your gonna need to focus on chins. No other exercise will help more than plain old chins.
*Dont think of pulliing your chin above the bar, instead think of pullling your chest to the bar. It makes a difference.
*Make sure your pulling your scapulas down and back with the movement. This is more important than getting your chin above the bar.
*If you can only do sets of three at the moment, do sets of 1-2, and focus on pausing and squeezing at the top… Since this is your weakest portion it makes sense to strengthen this position. You can use weighted isometrics at the top as well, but full ROM BW with a pause will probably do.
*Lastly, make sure your working your horizontal pulling with BW rows.
Hope this gives you some ideas.[/quote]
I am - when the body moves through space more hormones are released, in comparison to when the weight moves (Open/Closed chain)
OK - they may be different, but no different muscles are used or not used, maybe different intensities on certain muscles though - and it depends on the form/technique used… pulling straight up or pulling to chest. But all things being equal what kinetic differences are there?