Simply put, a pull-up is a chin-up performed using a pronated grip (palms facing away from the body), while a chin-up is performed either using a semi-supinated or supinated grip (palms facing each other, or towards the body). Although both exercises target the same muscle groups, chin-ups place more emphasis on the biceps muscles while pull-ups place more emphasis on the lattisimus dorsi muscles.
Starting position for pull-ups: Stand upright and stretch
your arms out so they are parallel with the ground (form a "T" with
your body). Now bend your lower arms at the elbow until they reach 90
degrees, and place your hands on the bar with your palms facing way from your body . This will be the starting position. You can use an open or closed grip
(thumb under or over the bar).
Starting position for chin-ups: Stand upright and stretch your arms straight above your head with your palms in a supinated position (facing your body). make sure you hands are about shoulder width apart, and place your hands on the bar with your palms facing your body (or facing each other). You can use an open or closed grip (thumb under or over the bar).
Contrary to popular belief, a wider grip doesn't always
mean a "wider" back. Don't be afraid to experiment with different hand
widths and positions. Most people like to incorporate both chin-ups and pull-ups into their back routines for variation.
Keep in mind that a pull-up will generally be more
difficult than a chin-up, as you will be placing more emphasis on the back muscles
(particularly the lats) and won't have as much assistance from the
biceps muscles.
The exercise: Slowly pull your body up to the
bar until your chest nearly comes in contact with it, and your chin is
above it. As you pull your body upwards, focus on pulling your elbows
down towards your rib cage. Exhale as you pull your body upwards, and
inhale as you lower your body. Focus on squeezing the upper and middle
back muscle as you pull upwards, not your arms.
Muscles Involved in Pull-ups & Chin-ups
Pull-ups and chin-ups are a compound movement that primarily target
the latisimus dorsi muscle and the biceps, however, the shoulders and other back muscles also act as synergists and stabilizers.
Here are all of the muscles used during a pull-up:
Synergists
- Biceps
- Levator scapulue
- Pectoralis major (sternal)
- Pectoralis minor
- Rhomboids
- Teres major
- Trepezius (lower)
Stabilizers