As explained above, agonist muscle forces (as indicated by the proxy of EMG) are probably largely similar when lifting the same relative load (but
a different absolute load) under stable and unstable conditions.
Not exact matches
The girls always enjoy when we make
Loaded French Fries or Nachos and this was no
different — an
absolute hit in our house!
Comparing squats with
different stance widths, both McCaw and Melrose (1999) and Paoli et al. (2009) found that stance width had no effect on the muscle activity of the adductors (using the same
absolute load).
Comparing squats with
different hip rotation angles, Ninos et al. (1997) found no differences in muscle activity between squats with the feet pointing neutrally forwards and the feet turned out at 30 degrees (using the same
absolute load).
Comparing squats with
different stance widths, Escamilla et al. (2001b) found no differences in ground reaction forces between squats with wide and narrow stances (with the same
absolute loads).
If a computer were to tell me at this moment the bridge can take exactly this much
load, no safety margin is required, and give a
different value at a
different time, well it would take a lot of experimental results for me to trust those ratings as much as the current one, and as a daily working number I would use the
absolute lowest calculated value for the worst possible conditions anyway.]