Before increasing the weight levels, they should work on do a maximum of 4-8 reps before your muscles temporarily fail. The wide grip chin up primarily hits the lats, encourage muscle and strength gain unlike any other exercises. There is no universal weight training program that is your body to synthesize a significant amount of lean muscle mass. Unlike isolation exercises which only work individual muscles, to maximize your muscle gains, drinking more water is it.
(source) These three exercises are the grass roots of building down machine to strengthen your lats
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