Pitching
Softball pitchers at any level require a level of accuracy with their pitches.[15] An accurate pitch is achieved through different techniques which help the pitcher to maintain a certain consistency of body weight and balance. The pitch starts with the grip and ends with a follow through after the ball is released from the hand of the pitcher. An accurate pitch requires skill in six areas: the grip, stance, windup, stride, release and follow through.
A perfect grip depends on which pitch the pitcher is throwing. For a normal fastball, it is beneficial to hold the ball firmly with your fingertips, but not so that the ball is pushed deep into your palm of your hand. In fastpitch softball, there are several types of grips for various pitches. There is not one correct way to hold or throw a pitch, it all depends on the pitcher. Some grips are easier for individuals due to the size of their hand while others find certain grips more difficult. This is why younger pitchers who have not developed into their normal hand size start with more basic grips such as the fastball. The main pitches involved in fastpitch softball are as follows: fastball, change-up, curveball, drop ball, and rise ball. Other pitches include both the drop curve, and well as the drop screw, and the backdoor curve.
The pitcher's stance is also important when pitching. In different types of competitions, different rules concerning the stance apply. In college, professional, and Olympic games, pitchers must place both feet on the rubber when starting the pitch. Other competitions require having only one foot on the rubber. The pitcher's feet are placed at a distance that is not larger than the width of the shoulders, with either one foot or both feet on the rubber. A common stance for pitchers is to have the ball of the foot on the same side as the throwing arm (also called the pivot foot) on the front edge of the rubber, and the toes of the alternate foot shoulder width apart and toward the middle or back side of the rubber.
A stride is performed from the beginning stance by rocking back, shifting the weight back to gain momentum and then moving the weight forward onto the ball of the pivot foot. The pitcher then pushes off the rubber with the pivot foot, pivoting that foot in a 30 to 40 degree, clockwise angle as the opposite leg moves out into a stride. The stride leg must land along the "power line", which means that the pitcher's body is in line with the plate, with the pitcher's hips facing the third base line. The angle of a pitch can be altered in different ways through the stride. If the pitcher is aiming for the outside corner of the plate, the pitcher will pivot, stride with the opposite foot, and land slightly outside of the "power line"; if the inside corner is aimed, the pitcher will land slightly inside. If the movement is very subtle, the batter will probably not be able to notice the change of angle. In most leagues during the pitcher's delivery, the pivot foot must drag along the ground in order for the pitch to be legal. If the drag foot lifts off the ground, an illegal pitch will be called for crow hopping. In this case, the batter is awarded with one ball to the count, and all base runners advance to the next base.[16] In international play – and in most men's leagues – the pitcher is allowed to jump with the pivot foot. A crow hop here is considered legal.
The windup is performed with the throwing arm and happens prior to the pitcher releasing the ball. Throughout the entire pitch, the upper body should remain upright, rather than bent over. The pitcher's throwing arm begins at the hip. Some pitchers move the throwing arm back as they shift their weight back, but it is not necessary throw an effective pitch. From the hip, the throwing arm moves up in a circle, brushing the ear, and returning to the hip prior to the release. The pitcher's arm should remain tight to the body to keep control of the pitch. This can be performed because the pitcher's lower body is pivoting in a straight line.
The release is one of the most important motions for the effectiveness of the pitch. The release technique consists of wrist-snapping and allowing the ball to roll off the fingertips when arm reaches the hip. If the snap also twists the wrist, the ball will move laterally or up and down, which can benefit the pitcher by confusing the batter.[17] The follow through is the last motion of a pitch. This is the point when the pitcher bends the throwing arm at the elbow, and the hand moves upward, finishing in front of the pitcher's face.
Overuse injury risks for windmill softball pitchers
Windmill pitching consists of three phases. The first phase, or "wind up" involves initiation of the motion until the top of the back swing (TOB). The second phase lasts from the top of the back swing until the instant of stride foot contact (SFC). The third phase occurs between the SFC and the instant of ball release (REL).[18]
Knowledge of the kinematic parameters of these phases is critical for physicians, physical therapists, and athletic trainers to devise better diagnostic and rehabilitative protocols that are specific to the athletes. A previous study by Alexander et al. demonstrated that the majority of kinematic parameters have low magnitudes and vary among pitchers during the windup phase.[19] In a follow-up study, Werner et al. examined the parameters of the second and third phases, which they termed the "delivery phase". They found 7 specific parameters of pitching mechanics that correlate to risk of shoulder injury: shoulder abduction, shoulder flexion, knee flexion angle at SFC, stride length, stride angle, and elbow and hip angles at REL. Monitoring these kinematics would aid in reducing shoulder stress. Mean shoulder abduction and shoulder flexion angles at SFC were 155° ±16° and 168° ±35°, respectively. As the stride foot contacted the ground, the knee demonstrated a mean value of 27°±9° of flexion. Stride length averaged 89% ±11% of body height. Stride position varied between subjects, with a mean value of −3 ±14 cm; this indicates that when the foot contacted the ground, on average it landed slightly to the first-base side of home plate for right-handed pitchers, and to the third-base side for left-handers. The elbow flexion angle was 18° ±9° and the lower trunk (hip) angle moved toward a closed position of 52°±18° at REL. This indicated that greater degrees of shoulder abduction at SFC and greater stride angle decreased the magnitude of shoulder compression force. Conversely, longer stride, open REL hip position, and greater degrees of elbow flexion at REL and of shoulder and knee flexion at SFC all increase shoulder compression force.[18]
Normative ranges for kinematic parameters have been established for an elite population of windmill pitchers. Specific pitching mechanic parameters correlate with clinically significant injury patterns. Interventions that take into account the aforementioned data could decrease shoulder forces, thus translating to lower rates of time-loss injury in this group of athletes.[18]
The fastest pitch on record was thrown by Eddie Feigner of "The King and His Court" who was clocked at ⁿ90 mph.[20] Feigner was at his best in the 1950s, and it is doubtful if this figure is correct.
The fastpitch swing can be broken down into seven components: 1. Stance 2. Grip 3. Bat Position 4. Shift of Weight 5. Hand Position 6. "Squishing the Bug" 7. Follow Through and Finish. There are many drills as well that can help aid in the advancing of one's mechanisms including hitting of a tee and soft toss drills. The swing must be very concise and compact since the ball is coming very fast and there is little time to react.[21]