Q: Is there an analytical relationship between the weight of your compound lift one rep max and the various accessory workouts of that muscle group?
For example, if I can squat 315 lb, is there a certain amount of weight I should be able to do on leg curls, or, leg extensions? If I can bench press 215 lb, what should I be able to move during tricep extensions or chest flys?
I found this website: https://strengthlevel.com/strength-standards
I grabbed the standard squat weights for varying bodyweights at the different experience levels, then I grabbed the leg extension weights. Divided the leg extension weight by the squat weight and plotted it to get the following chart:
Would this be a valid way of determining the amount? Using their built in calculator, two reps at a 315 lb squat would put me at "Intermediate". So the chart above means I should be able to do 76% of my squat weight for a leg extension (240 lb).