1 Income statement - This statement measures how well a company is performing financially during a specific time period. 2  Statement of retained earnings - This statement shows the effect of any profit or loss on the retained earnings of a company for a specific time period.
Chin-ups, like most pull-ups, target the latissimus dorsi muscle of the back as a shoulder extensor, scapular downward rotator and scapular depressor, in bringing the spine to the humerus. This is assisted by elbow flexors (brachialis, brachioradialis, biceps brachii) which bring the humerus to the forearm.
4. Do Heavy Biceps Curls. Your biceps are the secondary muscle groups to the back (primary muscle group) when performing pullups. Duffy recommends performing mixing in heavy biceps curls every other week or so. Shoot for 4-6 reps, whereas the other weeks, shoot for 8-12 reps.