How many sets/reps/min do I need to perform planks?
If your goal is to strengthen your core muscles, then performing planks should take about 1 set of 12-15 reps each time you do it. This is good enough for most people with curvature who want to strengthen their core muscles without causing excessive discomfort or injury. However, if your goal is just getting in shape or losing weight quickly, then it's probably a good idea to do a "normal" amount of reps and sets.