Strength Training

These guys have a whole training program for one-arm chin ups.

"A one-arm chin is not learned overnight. Depending on your starting point, it can take 6 months to 3 years or more to achieve it. Weight and age are important factors. Less weight and younger age make a one-arm chin much easier to achieve, but Alexander at 220 lbs. and Jack at 60 years of age both achieved it."

 

 

So you can do this.