Nerd Question – Resistance & Strength Profile

HypertrophyCoach Joe Bennett Forums Training Nerd Question – Resistance & Strength Profile

Viewing 6 posts - 1 through 6 (of 6 total)
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  • #23392
    Luke
    Participant

    Hey Joe,

    i have kinda a nerd question. The following just doesnt get into my head which i’ll try to explain via the comparison of cable work for triceps Vs. Swissbar/Dips Press for Triceps:

    Cable Triceps: the maximum tension on the muscle is when the cable is perpendicular to the forarm and therefore the most far away from the elbow joint. The tension on the muscle decreases the further u get into contraction, since the cable is moving closer to the joint (moment arm and therefore torque decreases.. which u explained so well already). This fits the strength profile of the muscle – it gets weaker the more its shortened/in contraction.

    Now.. Swissbar Press/ Dips: The chains or bands help that it gets harder as more as you get into the shortened position / into contraction, since, due to the reduced moment arms (elbow & shoulder) the torque decreases, and one can put more loads onto the muscles just like on the triceps in this example.

     

    So, sorry for repeating but i hope i can explain it alright: one time (-cable-) due to the decreased torque in the elbow joint the work for the muscle -decreases- (as it fits the strength profile of the muscle) going into its shortened contraction, and the other time (swiss bar press / dips), the work for the muscle -increases- coming into its shortened position due to the usage of chains/bands (which now also kinda fits the strength profile of the muscle?).

    The answer might be obvious and im just sitting on my own stupid head. I apologize then. But it just doesnt get into my brain.

     

    (I’m new here and looking forward to be sucking on ur brain like a newborn at its mamas breasts.)

     

    best regards from germany,

     

    Luke

     

    #23475
    Rei Koka
    Participant

    Im not sure If I understood your question right and obv Joe’s answer will be 1000x better than mine but what you are comparing is basically the difference between a single joint exercise and a multi joint exercise. On single joint exercises the pattern that our muscle strength profile is. STRONG at the lengthened position of the muscle. STRONGEST at the mid range and then WEAKEST in the short position. For Multi Joint ( more than a joint moving) exercises like the swiss press the strength profile is , you are WEAKEST at the bottom and get much STRONGER as you get to the top. Your triceps alone might actually be weaker at the top because it is in the short position however because your joints are stacked right on top of the other and the moment arm gets shorter you get into such a mechanical advantage that it completely dwarfs the difference of strength between long and short length of the muscle if that makes sense.

    #23476
    Luke
    Participant

    I think u just answered my question perfectly. Makes total sense… thanks a lot Rei!

    #23484
    Rei Koka
    Participant

    I think u just answered my question perfectly. Makes total sense… thanks a lot Rei!

    You’re welcome man. I would still wait for Joe’s answer best but hope mine was helpful too ahaha 😅

    #23508
    Joe
    Keymaster

    Hey Joe,

    i have kinda a nerd question. The following just doesnt get into my head which i’ll try to explain via the comparison of cable work for triceps Vs. Swissbar/Dips Press for Triceps:

    Cable Triceps: the maximum tension on the muscle is when the cable is perpendicular to the forarm and therefore the most far away from the elbow joint. The tension on the muscle decreases the further u get into contraction, since the cable is moving closer to the joint (moment arm and therefore torque decreases.. which u explained so well already). This fits the strength profile of the muscle – it gets weaker the more its shortened/in contraction.

    Now.. Swissbar Press/ Dips: The chains or bands help that it gets harder as more as you get into the shortened position / into contraction, since, due to the reduced moment arms (elbow & shoulder) the torque decreases, and one can put more loads onto the muscles just like on the triceps in this example.

     

    So, sorry for repeating but i hope i can explain it alright: one (-cable-) due to the decreased torque in the elbow joint the work for the muscle -decreases- (as it fits the strength profile of the muscle) going into its shortened contraction, and the other (swiss bar press / dips), the work for the muscle -increases- coming into its shortened position due to the usage of chains/bands (which now also kinda fits the strength profile of the muscle?).

    The answer might be obvious and im just sitting on my own stupid head. I apologize then. But it just doesnt get into my brain.

     

    (I’m new here and looking forward to be sucking on ur brain like a newborn at its mamas breasts.)

     

    best regards from germany,

     

    Luke

     

    #23509
    Luke
    Participant

    I totally get it now. Big thanks Joe!

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