https://www.strongerbyscience.com/rom/
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For People With Hypertrophy Goals
As a general heuristic, you should perform most exercises through the longest range of motion you (safely and comfortably) can.
If you want to take things one step further, you could specifically seek out exercises that let you train your target muscle(s) though the longest possible (safe and comfortable) muscle lengths. Make sure these exercises are still challenging when your muscles are in a lengthened position.
If you want to take things an additional step further, you could eschew the portion of the range of motion that trains your muscles at short muscle lengths, and give long-muscle-length partials a shot. Pausing reps when your muscles are in a lengthened position will ramp the challenge up further.
If you’re feeling really experimental, you could even give long-muscle-length isometrics a shot, holding each isometric rep for 20-60 seconds, at the longest muscle length that still allows for active force generation.