Eccentric pullups

■ Shoulder width grip  
■ Full range up and down each rep 
■ Keep shoulders back, chest up at the top of each rep 
■ Jump up as much as is needed to get all the way up 
■ Lower for 10 seconds 
■ Repeat for 3 total reps 
■ Once you achieve 3 reps, try 1 full and 2 eccentric, once you achieve this for all 3 sets, then try 2 full, 1 eccentric, once you achieve this for a 3 sets, then try 3 full reps