1)Considering your lack of understanding of basic exercise, and biomechanics, what makes you think that your hamstrings are weak and stretched?
2)For correct posture you do not need more flexibility than is needed in a stiff legged deadlift, or a RDL.
3)You seem to be mixing basic and advanced exercise concepts with basic and advanced biology concepts with basic and advanced biomechanics.
Example, is "b) By the other side, I can’t understand why if a muscle is too long, it can be overworked. "
“Overworked” is an exercise concept, not a biology definition for muscle fibers. Don’t mix them and you might understand better. Try to understand that “Overworked” means the muscle hasn’t recovered, and will likely not recover at the normal rate for the person working out. There is not set biology definition such as your fiber length has increased 10% and atp storage is reduced by 50%.
1)some expert people (in not particular order: chiro; pilates teacher; kisesiologist; physiotherapist; Ortopedic) tested my posture and diagnosed tight and weak hamstring.
- I know that I do not need a lot of flexibility for a good posture. But I want flexible hamstrings for performace. I would like to know:if I do improve my hamstrings’flexibility, can this exacerbate my APT problem or not?
3)I do not want mix concepts and your post can help me to avoid mixing.
I didn’t undersrtand correctly the term “overworked”. I thought that “overworked muscle” was referred to indicate the “overactive” muscle (for example, hips in APT).
Because I’ve a lack of undrestanding of basic exercise*, can you explain me please the correlation between this 2 concepts: overactive and lenght muscle.
Eric Cressey and Mike Robertson write: “The core and glutes are inhibited; the hip flexors, hamstrings and erector spinae are overactive. This results in anterior pelvic tilt and exaggerated lordosis (swayback).”
In Hips don’t lie, Mike Robertson write that hamstring in APT are lenght and weak.
So, can a muscle be overactive and weak/lenght at the same time?
I’m not the only one to have a bad understanding of these concepts: http://www.T-Nation.com/tmagnum/readTopic.do?id=2048266
You help is very well accepted!
*I’m new to biomechanic, because my first love was biochemistry. I began to read about biomechanic because I had several problems with my neck.
In every case, be kind and consider that sometimes it’s not a matter of lack of knowladge, but the diffuclty to translate some words (especially when they have a lot of meanings, like overworked).