Why "feeling the muscle work" doesn't mean it's working
Mechanical tension drives hypertrophy, and you have no conscious sense of it. What you can feel — burn, pump, soreness — tracks metabolite accumulation and tissue damage, which are different things that happen to occur nearby.
read → 9 min 02Why your form breaks down before you think you're at failure
Under fatigue the nervous system protects the task, not the target. The bar keeps moving because other muscles step in and the range quietly shrinks — so the reps continue while the exercise you thought you were doing has already ended.
read → 9 min 03Why range of motion matters more than the exercise you're doing
Joint angles, moment arms and where in the range the resistance actually peaks determine the stimulus. Two people running identical exercise selection can be training almost different muscles — which makes "best exercise" lists close to meaningless on their own.
read → 10 min