Another Band Tension Question...

[Screwball]

I know we've discussed band tension a thousand times, so please bare with me. Assuming the green bands are choked-down around dumbbells lying on the floor while benching, the tension is around 75 lbs. per band or 150 lbs. of total band tension at the top. Is this correct? Well, say you choked the green bands around two dumbbells for each side. Quite a bit of slack is taken out of the bands. How much would you estimate the band tension is increased? Per band? Total? Any thoughts are appreciated. Thanks!

 

[Skizac]

There's really no way to tell for sure unless you use a scale. First weigh yourself, then stand on the scale with the bar on your back and the bands on the bar. Then subtract your weight + the bar's weight and you have the band tension at the top.

If you don't have a scale that goes high enough, you can use a 2x4 board cut to the appropriate length.

 

[Deciever]

Found this article on Elitefts.com i figured it might help w/ some band tension questions.....

".....

Anyhow here's my band tension findings . . .

Tension Values of Jump-Stretch bands with different cinching and
anchoring systems.

I spent the better part of a Winter day doing this - so I hope ya'all
appreciate it!

"Slack" measures distance from nearest part of anchor to end of band
held to furthest length.

"Single-cinch" means one end or loop fed through another loop around
an anchor,

"Double-cinched" means one loop feed through other loop twice around
anchor. Third option is self-explanatory.

"Double-looped" refers to draping band over bar so that the two loops
of each band are used as a single suspension point.

The meaurees after the slack tell you how much extra stretch from the
slack point (=0) the poundage gives you . . . i.e. if 45 lbs stretchs
a band 4" then 45 lbs of pressure will stretch it 4". In the case of
the double-looped anchorings the use of four loops to hold the barbell
took up enough band so that the bottom of the barbell was actually one
inch higher than the bands hanging slack - hence the "-1.0" for the 45
lb measure.

The bands were looped around the outside of the barbell collar in
every case. I assume that you would place weights on the outside of
the band as you add them.



Blue Bands - (single-cinched)
Slack = 33.0"
w/ 45 bb = 1.5"
w/ 135 = 15.25"
185 = 27.5"

Blue Bands - (double cinched)
Slack = 27"
w/ 45 bb = 1.5"
w/ 135 = 12.5"
185 = 22.5"
205 = 28"

Blue Bands - (single-cinched around two dumbells)
Slack = 19"
w/ 45 bb =2.75"
w/ 135 = 12.75"
185 = 21.0"
205 = 24.0"
235 = 30.0"

Blue Bands - (double looped)
Slack = 18"
w/ 45 bb = -1" (less than slack)
w/ 135 = 2"
185 = 4"
205 = 5.25"
235 = 6.5"

Green Bands - (single-cinched)
Slack = 32.5"
w/ 45 bb = 3.0"
95 = 15.0"
115 = 21.5"
125 = 25.0"
w/ 135 = 28.5"

Green Bands - (double cinched)
Slack = 25.0"
w/ 45 bb = 2.75"
95 = 11.5"
115 = 17.75"
125 = 22.5"
w/ 135 = 23.5"

Green Bands - (single-cinched around two dumbells)
Slack = 18.5"
w/ 45 bb = 2.25"
w/ 135 = 16.5"
185 = 28.5"
205 = 34.5"
235 = 41.5"

Green Bands - (double looped)
Slack = 18"
w/ 45 bb = -1.0 (less than slack)
w/ 135 =2"
185 = 5.5"
205 = 7.25"
235 = 10"

Pink Bands - (single-cinched)
Slack = 35"
w/ 45 bb = 7.0"
65 = 13.75"
85 = 22.5"
95 = 28.25"

Pink Bands - (double cinched)
Slack = 29.5"
w/ 45 bb = 5"
65 = 10.5"
85 = 17.5"
95 = 22.5"
105 = 26.75"

Pink Bands - (single-cinched around two dumbells)
Slack = 20.5"
w/ 45 bb = 6.0"
95 = 20"
w/ 135 = 32.5"


Pink Bands - (double looped)
Slack = 18"
w/ 45 bb = -0.5 (less than slack value)
w/ 135 = 5.0"
185 = 11.5"
235 = 19.5"
235

I also measured the minis -

New Greens or New Blues should be equal and should be measured
double-lopped

Slack = 18.5"
45 = 3.75"
65 = 8.25"
85 = 14.0"
95 = 18.5"

I have learned that a heavily-used (for over a year) miniband will
stretch 50% more than its new counterpart. i.e. 95 pounds will
stretch 27" instead of 18.5"



Andy

..."

 

[k1401]

Great response and research Deciever

 

[Deciever]

cant say i made that, got it from elitefts, from the ask dave section.. glad it helped though