Tuesday 30 January 2007

Heavier Isn't Always Better


Generally the recreational bodybuilders who seem to have reached a plateau in their development adhere to a decidedly myopic training philosophy: increase the resistance, but keep everything else the same. Good form is often sacrificed at the expense of more weight. The result has been the evolution of some rather bizarre lifting techniques: how many times have you witnessed the ectomorphic novice trying to swell his biceps by holding a barbell with elbows flexed, swaying back and forth from the waist before throwing the weights down with a mighty crash and then striding off to admire the supposed growth in the mirror. Lateral raises are the funniest exercise performed poorly. Determined to keep pace with the big boys, the over-zealous bodybuilder extends the prescribed slight elbow bend to a full ninety degrees (thus reducing the lever length and the comparative resistance), and then proceeds to flick the dumb bells up to shoulder height with a complex multi-joint movement focused chiefly on the lower back and wrists.

In such cases the target muscle gets off rather lightly whilst there is an unintentional, and largely ineffective, working of the lower back and forearms. The risk of injury is high and the likelihood of muscular development low.

Let’s look at the bicep curl. This exercise, presumably, is meant to stimulate growth of the biceps/brachialis muscles. To effectively target a muscle it is necessary to focus on the relevant joint action. In the case of the biceps, the role of the muscle is to flex the elbow joint (not the lower back!). It is essential, therefore, to isolate this joint by fixing the elbows at the sides and keeping the wrists in line with the elbows and forearms throughout the motion (many body builders make the mistake of curling the wrists over at the top of the movement). The torso should remain upright with a neutral spine position and the shoulders down and relaxed. The abdominals should be pulled in about 25% and the knees should be soft (slightly bent).

Generally the speed should be moderate with control of the eccentric (downward) movement during which the muscle is lengthening under tension. Poliquin (1990) demonstrates that the greatest hypertrophy gains are made using a repetition range of 8-12 and a moderate resistance: it is not necessary to lift very heavy weights to develop muscle. A weight should be selected that allows the trainer to perform within the prescribed rep range so that overload is achieved at the end of the set. Weight increases should be made in small increments allowing for the retention of perfect exercise form.

The challenge for the recreational body builder is to compete not with the other people in the gym, or with Arnold Schwarzenegger or whoever one’s idol is, but to compete with oneself. The weight must fit the person and that person’s specific goal. The exercise chosen, the form, the speed, the number of sets, the rest periods must follow the law of specificity. What do you wish to achieve? What is the best exercise to achieve this? What joint actions are involved and how do you best perform the exercise? Training is not random and it is not about brute force. You must know what your goals are and how best to approach those goals by using safe and effective exercises. If you must flick your wrists and sway your back during lateral raises then you should be able to explain exactly why you are doing this.

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