- #1

Trooper149

- 14

- 3

Hi all, not exactly a physicist however I am finding that the expertise of those in this field, would be massively appreciated in the field I am currently delving into - exercise science. Specifically an understanding of engineering physics.

As described above, in short I am trying to work out how much force is exerted by the abs during a single rep of the hanging leg raise (best search online to know what I mean), for the tempo of 1.5s up and .5 seconds down.

I have been looking up leverage, torque, fulcrums, etc and while I think I have the right formula, I would greatly appreciate second perspectives.

With this said, here are some figures:

-the total weight of the lower body (load) to be lifted is 36.4kg

-the total length of the lower body (loading arm) is 1.15m

-the abdomen connects into the loading arm at .1m

-when performing the leg raise, we are lifting from a dead hang position (0 degrees) to a right angle (90 degrees) parallel with the ground

-the arc of movement is 1.8m

With all this said, the equation I have followed is: (load to be lifted X by loading arm length X by length of arc)

36.4kg X 1.15m X 1.8m = 75.6NW/KG (75.6kg of force I think?)

My reason for asking is there is plenty of information and knowledge available on basic weightlifting and application of volume, however the information surrounding body weight training is a lot more vague and is far more dependent on levers. Combine this with the fact that a lot of experts in this field are more successful marketers than coaches. With this said, I would really like to learn the application of levers in bodyweight training and how much force is produced by muscles during certain exercises.

I have attached a copy of my equation in an excel document.

Cheers and Happy Easter

As described above, in short I am trying to work out how much force is exerted by the abs during a single rep of the hanging leg raise (best search online to know what I mean), for the tempo of 1.5s up and .5 seconds down.

I have been looking up leverage, torque, fulcrums, etc and while I think I have the right formula, I would greatly appreciate second perspectives.

With this said, here are some figures:

-the total weight of the lower body (load) to be lifted is 36.4kg

-the total length of the lower body (loading arm) is 1.15m

-the abdomen connects into the loading arm at .1m

-when performing the leg raise, we are lifting from a dead hang position (0 degrees) to a right angle (90 degrees) parallel with the ground

-the arc of movement is 1.8m

With all this said, the equation I have followed is: (load to be lifted X by loading arm length X by length of arc)

36.4kg X 1.15m X 1.8m = 75.6NW/KG (75.6kg of force I think?)

My reason for asking is there is plenty of information and knowledge available on basic weightlifting and application of volume, however the information surrounding body weight training is a lot more vague and is far more dependent on levers. Combine this with the fact that a lot of experts in this field are more successful marketers than coaches. With this said, I would really like to learn the application of levers in bodyweight training and how much force is produced by muscles during certain exercises.

I have attached a copy of my equation in an excel document.

Cheers and Happy Easter