Showing posts with label Techniques. Show all posts
Showing posts with label Techniques. Show all posts

Wednesday, April 8, 2015

Essential warm-up techniques for resistance training

The warm-up is an essential introductory part of the training session that helps participants prepare both mentally and physically for the training session (Siff 2004; Jeffreys 2008). Warm-up techniques can be broadly classified into two major categories: passive warm-ups and active warm-ups. Passive warm-ups involve raising the muscle temperature or core temperature by some external means. Various methods include hot showers or baths, saunas, diathermy and heating pads. Passive heating increases both muscle and core temperature without depleting energy substrates (Bishop 2003a). Meanwhile, active warm-ups involve exercise. They are likely to induce greater metabolic and cardiovascular changes than passive warm-up procedures, and they also potentially disrupt transient connective tissue bonds and improve the body’s neuromuscular preparedness for the specific task ahead (Jeffreys 2008; Bishop 2003a).


A typical active warm-up for resistance training should involve two phases: general and specific. The purpose of a general warm-up is to increase the functional potential of the body as a whole, whereas the goal of the specific phase is to establish the optimal relationship between warm-up and the forthcoming resistance exercises (Siff 2004). A typical general warm-up can last 5 to 10 minutes (Ratamess 2012b). This first phase usually begins with light-intensity exercises such as jogging, cycling or easy stretching or active displacements. The intensity is increased progressively in order to lead participants towards the specific phase, which is aimed to optimise their preparation for the main part of the workout. However, for resistance exercises, a general warm-up does not always involve aerobic exercise such as cycling or jogging. Global callisthenic movements, easy stretching and dynamic flexibility movements are also appropriate.


A specific warm-up phase can last 8 to 12 minutes (Jeffreys 2008). Its structure varies greatly depending on the sport or activity. For resistance training, the specific part of the warm-up can involve several (four to six) dynamic exercises, which can be completed using bands or a medicine ball as required. Before commencing the main part of the workout, participants should perform one or two sets of a few repetitions (four to eight) with a light to moderate load of the principal multijoint exercise to be trained (Ratamess 2012b). It appears that a specific warm-up can provide further benefits in addition to those provided by a general, active warm-up, possibly by optimising the required neuromuscular activation for the main part of the workout (Bishop 2003b). The following list depicts examples of general and specific warm-ups for lower-body resistance training.


General warm-up

? Five minutes of low-intensity aerobic exercises: jogging and three low-intensity stretching exercises (one leg rise for hamstring, forward lunge and seated toe touch).


Specific warm-up

? Medicine ball twist 1 x 20
? Medicine ball wood chops 1 x 10
? Straddled toe touch 2 x 5
? Dynamic quadriceps stretch 1 x 5
? Medicine ball squat 1 x 5 to 8
? Back squat using 50 percent of the load to be used during the main part of workout

The following list depicts the ways in which a proper warm-up positively affects performance (Bishop 2003a):


Temperature related

? Decreases resistance of muscles and joints
? Increases release of oxygen from haemoglobin and myoglobin
? Speeds up metabolic reactions
? Increases nerve conduction rate
? Increases thermoregulatory strain


Non-temperature related

? Increases blood flow to muscles
? Raises baseline oxygen consumption
? Enhances postactivation potentiation
? Psychologically prepares participant for main routine


The warm-up movements should speed up contraction and relaxation of both agonist and antagonist muscles, which improves strength, power, rate of force development and reaction time (Jeffreys 2008). Whilst the influence of warming up on injury prevention is still unclear (Bishop 2003a), some studies suggest that it prevents muscular or connective tissue injury (Olsen et al. 2004; Olsen et al. 2005). At the very least, a structured warm-up can enhance performance and may reduce injury potential (Ratamess 2012b). Currently no evidence suggests that a warm-up is detrimental to performance. Some evidence suggests that under certain circumstances, a low-volume and high-intensity resistance training exercise (>80 percent 1RM) warm-up increases neuromuscular activation and therefore increases the performance in explosive actions performed next (Tillin and Bishop 2009). It has also been hypothesised that warming up may have a number of psychological effects (Bishop 2003a).


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Friday, April 3, 2015

Putting Techniques

Human Kinetics Publishers, Inc.

Given the variety in both equipment and player preferences, there are multiple ways of stroking a putt. With recent and impending rule changes relative to putting technique, the number of techniques will continue to change. We therefore recommend that a player master the conventional method of putting using a standard length putter. Once that technique has been mastered, he or she may experiment with different putters and techniques. In this step, we will describe a conventional method of putting and offer an alternative technique known as the arm lock.

The governing bodies of golf, the USGA (United States Golf Association) and the R&A (Royal and Ancient Golf Club), have recently created a rule change regarding putting technique. The proposed rule change falls under Rule 14-1b (USGA 2012 Rules of Golf), and it states that during the execution of a putting stroke a player may not anchor the club, either "directly" or by use of an "anchor point." To clarify the rule, two notes are provided. Note 1 states that "the club is anchored ‘directly’ when the player intentionally holds the club or a gripping hand in contact with any part of his body, except that the player may hold the club or a gripping hand against a hand or forearm." Note 2 states that "an ‘anchor point’ exists when the player intentionally holds a forearm in contact with any part of his body to establish a gripping hand as a stable point around which the other hand may swing the club." In short, with the exception of the forearm, a player’s hands or club may not have sustained contact with any part of the body during the stroke. Both the conventional putting stroke and the arm-lock technique presented in this step conform to these new rules. The two techniques presented also accommodate a player’s choice of putters. Currently putters are available in these three lengths:

Conventional putters (shaft length of 28-35 inches; 71-89 centimeters)Belly putters (shaft length of 40-45 inches; 101-114 centimeters)Long putters (shaft length of 46-55 inches; 116-140 centimeters)

The distinguishing characteristic in each of these putters is the length of the shaft. Putters also come with a variety of heads. The most common putter heads are blade and mallet putters. While the length of the putter shaft influences the putting technique, the type of putter head does not.

As the name implies, this stroke is used with putters of conventional length. It is also the most common stroke used by current and past players - both professionals and amateurs. This technique has stood the test of time for producing consistent results. It also contains all the fundamentals for a technically efficient and effective stroke, so particularly for beginners, it is a good technique to learn as the first step in becoming a good putter.

The first step of the putting stroke is lightly gripping the putter in the palms of your hands. To create an efficient and controlled stroke in a conventional putting stroke, the hands should be directly opposite each other, as if you were clapping (figure 1.3a). Next, set the putter face behind the ball so that it is square to the target line (the line you intend your ball to track along to the target). Assume a comfortable posture in which you feel relaxed. Your arms and hands should be under your shoulders, your eyes directly over the ball, your knees slightly bent, and your weight evenly distributed over both feet, which are about shoulder-width apart. To allow for a straight putt, your shoulders, hips, knees, and feet should all be parallel with the target line. The ball should be slightly closer to the target side of the center of your stance.

The putting stroke is a pendulum action, much like the swing of the pendulum at the bottom of a large grandfather clock. Using a rocking action with the shoulders, bring the putter back and then forward through the ball with an even tempo (figure 1.3b). The arms and wrists have very little or no independent movement in a good putting stroke. Bring the putter back approximately the same distance as you bring it forward, just like the pendulum on a clock. The length of the stroke controls the distance of the putt, not how fast you swing the putter. Using the length of the stroke to control the distance the ball travels permits the greatest control over the putter head. The length of the stroke is, therefore, directly related to the length of the putt: The longer the stroke, the longer the putt. An unrushed, rhythmic, straight-back and straight-through stroke helps bring the putter head to the ball with the face of the putter directly facing the target line of the putt, allowing you to contact the ball squarely in the center of the putter, also known as the sweet spot.

Several key factors promote solid contact between the ball and putter head. The first is a steady body. A player needs to be relaxed during the stroke, but there is very little movement in the lower body (no weight shift, little or no movement of the hips or legs), no lateral movement of the upper body, and little movement from the arms or wrists. The shoulders turning around a fixed spine provide almost all the necessary movement. The angle of the spine should remain constant throughout the putting stroke. Keeping the body steady makes it much easier to bring the putter head squarely in contact with the ball. A moving body makes the putting stroke seem as though you are trying to hit a small, but moving target.

A second key to a solid putt is light grip pressure. A light grip allows the shoulders, arms, and hands to respond naturally in the stroke without conscious thought. A light grip also keeps the putter on the target line longer, because it gives you the feeling of stroking the ball into the hole rather than slapping the ball and hoping it ends up somewhere near the hole. Finally, maintaining a light grip on the putter makes it easier to relax the entire body and thus allows your natural muscle responses to help you putt successfully.

A final key to consistent, confident contact is a preshot routine. The preshot routine is discussed in more detail in step 11. A few brief notes here, however, will prove helpful as you develop your putting stroke as the preshot routine should be seen as an integral part of executing a putting stroke. Simply put, a preshot routine is a series of activities you routinely perform before each stroke. A preshot routine includes picking your target (where you want the ball to go), identifying your target line (the path the ball will take to get to the target), setting up to the ball, and stroking the ball along the target line to the target. These actions are linked in a continuous, relaxed flow. Most players select the target and target line while standing or squatting behind the ball. It provides a better view of the green than you get while standing alongside the ball. After picking the target and line, step up to the ball, place your putter head behind the ball along the target line, assume your putting address position, look at the hole, look at the ball, and stroke your putt. The time from initiating your routine to completing the stroke should be as minimal as possible, without feeling rushed. No single routine is applicable to every golfer, so you will need to experiment a bit to find the routine that fits you best. To ingrain a preshot putting routine, you need to practice it on the practice green. The Preshot Routine drill will help you develop this vital part of your putting stroke.

After the putter strokes the ball, several factors in a follow-through help ensure a successful putt. First, the wrists should be locked or firm as the putter head comes through the ball all the way to the finish (figure 1.3c). This position promotes square contact with the ball during impact. Flipping or moving the wrists changes the angle of the putter head, making solid contact with the ball almost impossible. The putter head should accelerate through the ball; it is a stroke, not a strike. Finally, if the putt is made with a rhythmic stroke, the follow-through will be the same length as the backstroke.

To help keep the body stable and to maintain the angle of the spine throughout the stroke, many good players keep their heads still and don’t even look up to watch the ball after they stroke it. Rather, they listen for the ball to fall into the hole. In addition to ensuring that the angle of the spine remains steady, listening rather than watching keeps the shoulders (and consequently the arms) from moving away from the target line, making it easier to stroke the ball along the intended target line.Not only does listening to the ball fall promote good putting technique, it is a sweet sound every golfer enjoys hearing.

Preparation

Take your grip by turning the palms toward each other.Putter head is square to the target line.Shoulders, hips, and thighs are square to the target line.Feet are set shoulder-width apart, and the weight is evenly distributed on both feet.Eyes are directly over the ball.Grip pressure is light and relaxed.

Execution

Shoulders, arms, and hands move as one unit.Shoulders, arms, and hands move in a pendulum motion.Putter head moves back along the target line.Lower body remains still throughout the stroke.Backswing and forward swing are the same in terms of distance and tempo.

Follow-Through

Putter head comes through and follows along the target line.Wrists remain firm throughout the swing (no breaking).Putter head comes through the ball at the same tempo as the backswing.Listen (rather than watch) for the ball to fall into the cup.


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