Kiitos korjauksesta, kyseiseltä saitilta olen itsekin anatomiaa tutkinut. Minulla meni kirjoituksessa ajatus solmuun, tarkoitin brachialista puhuessani brachiin "alapuolisesta" lihaksesta... Tässä lisää samaista tajunnan virtaa eri lähteistä:
According to Charles Poliquin in his book The Poliquin Principles, the brachialis is often a weak link in arm development. He states that many bodybuilders have found that adding specific brachialis exercises to their workouts can increase their arm size by as much as one inch in a month! So how do we target this bad boy?
During an arm curl, the biceps brachii and the brachialis share almost equal work in elbow flexion, yet as soon as you reverse the grip, the brachialis carries most of the load and is thus isolated (although the brachioradialis will get stressed as well.) However, pronation reduces biomechanical efficiency, thus only allowing you to reverse curl anywhere from 66 to 82% of a regular arm curl (Kostek & Knortz, 1980).
In other words, with your palms facing down, your strength drops by up to a third compared to your palms facing up. Obviously, you'll have to use a lighter load (Siff & Verkhoshansky, 1999).
Speed also plays a role. One abstract revealed that velocity can influence elbow flexor recruitment (Kulig et al., 2001). The biceps brachii was found to be preferentially recruited during the fast protocol while the brachialis was found to be preferentially recruited during the slow protocol. Also, eccentric (negative) training influences the recruitment of fast twitch fibers — which have the greatest potential for hypertrophy (Antonio, 2000). This suggests that we should use a fairly slow tempo, particularly during the eccentric contraction.
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The mid-incline hammer curl is a great movement to stress the brachioradialis and the long head of the biceps. It will contribute quite nicely to adding some size to your arms.
To perform this exercise, simply lay back on an incline bench set at a 45-degree angle. Use a semi-supinated grip (i.e. a neutral grip where your palms are facing each other), curl the weight upward from a straight arm position (full extension) to as far as you can go (full flexion.) It's crucial to keep the shoulders back and the elbows pointed down as long as possible (they'll naturally rotate upward near the top of the movement). Another important point is to keep the head back and neck straight. Bending your head forward to check out your form in the mirror may compromise strength!