Increase and improve your leap vertical, jumping and running skills now with this type of basketball plyometrics training

November 7th, 2007 Share

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Introduction

Speed and strength are integral components of fitness found in varying degrees in virtually all athletic movements. Simply put the combination of speed and strength is power. For many years coaches and athletes have sought to improve power in order to enhance performance. Throughout this century and no doubt long before, jumping, bounding and hopping exercises have been used in various ways to enhance athletic performance. In recent years this distinct method of training for power or explosiveness has been termed plyometrics. Whatever the origins of the word the term is used to describe the method of training which seeks to enhance the explosive reaction of the individual through powerful muscular contractions as a result of rapid eccentric contractions.

Muscle Mechanism

The maximum force that a muscle can develop is attained during a rapid eccentric contraction. However, it should be realised that muscles seldom perform one type of contraction in isolation during athletic movements. When a concentric contraction occurs (muscle shortens) immediately following an eccentric contraction (muscle lengthens) then the force generated can be dramatically increased. If a muscle is stretched, much of the energy required to stretch it is lost as heat, but some of this energy can be stored by the elastic components of the muscle. This stored energy is available to the muscle only during a subsequent contraction. It is important to realise that this energy boost is lost if the eccentric contraction is not followed immediately by a concentric effort. To express this greater force the muscle must contract within the shortest time possible. This whole process is frequently called the stretch shortening cycle and is the underlying mechanism of plyometric training.

Choose the method to fit the sport

The golden rule of any conditioning programme is specificity. This means that the movement you perform in training should match, as closely as possible, the movements encountered during competition. If you are rugby player practising for the line-out or a volleyball player interested in increasing vertical jump height, then drop jumping or box jumping may be the right exercise. However if you are a javelin thrower aiming for a more explosive launch, then upper body plyometrics is far more appropriate.

Plyometric Exercises

The following are examples of lower body and upper body plyometric exercises.

Lower Body

Drop Jumping: - This exercise involves the athlete dropping (not jumping) to the ground from a raised platform or box, and then immediately jumping up. The drop down gives the pre-stretch to the leg muscles and the vigorous drive upwards the secondary concentric contraction The exercise will be more effective the shorter the time the feet are in contact with the ground. The loading in this exercise is governed by the height of the drop which should be in the region of 30-80 cm. Drop jumping is a relatively high impact form of plyometric training and would normally be introduced after the athlete had become accustomed to lower impact alternatives, such as two-footed jumping on the spot.

Bounding and hurdling: If forward motion is more the name of your game, try some bounding. This is a form of plyometric training, where over sized strides are used in the running action and extra time spent in the air. Two-legged bounds reduces the impact to be endured, but to increase the intensity one legged bounding, or hopping, can be used. Bounding upstairs is a useful way to work on both the vertical and horizontal aspects of the running action. Multiple jumps over a series of obstacles like hurdles is a valuable drill for athletes training for sprinting or jumping events.

Examples of lower body plyometric exercises with intensity level:

• Standing based jumps performed on the spot (low intensity) - Tuck Jumps, Split Jumps
• Jumps from standing (low-medium intensity) - Standing long jump, Standing hop, standing jump for height
• Multiple jumps from standing (medium intensity) - bounds, bunny hops, double footed jumps over low hurdle, double footed jumps up steps
• Multiple jumps with run in (High intensity) - 11 stride run + 2 hops and a jump into sandpit, 2 stride run in + bounds
• Depth jumping (high-very high intensity) - jumps down and up off box (40-100cm), bounding up hill
• Eccentric drop and hold drills (high-very high intensity) - hop and hold, bound/hop/bound/hop over 30m (athletes stops and holds on each landing before springing into the next move), drop and hold from a height > one metre

Upper Body

A variety of drills can be used to make the upper body more explosive:

Press ups & hand clap: Press-ups with a hand clap in between is a particularly vigorous way to condition the arms and chest. The pre-stretch takes place as the hands arrive back on the ground and the chest sinks, and this is followed quickly by the explosive upwards action. Once again, to get the best training effect keep the time in contact with the ground to a minimum.

Medicine Ball: Another means of increasing upper body strength popular with throwers is to lie on the ground face up. A partner then drops a medicine ball down towards the chest of the athlete, who catches the ball (pre-stretch) and immediately throws it back. This is another high-intensity exercise and should only be used after some basic conditioning.

Planning a Plyometric Session

The choice of exercises within a session and their order should be planned. A session could :

• begin with exercises that are fast, explosive and designed for developing elastic strength (low hurdle jumps; low drop jumps)
• work through exercises that develop concentric strength (standing long jump; high hurdle jumps)
• finish with training for eccentric strength (higher drop jumps).

An alternative session could be:

• begin with low hurdle jumps
• progress to bounding and hopping,
• continue with steps or box work
• finish with medicine ball work out for abdominals and upper body.

Example plyometric sessions for the arms and legs are detailed on the Leg Plyometric page and the Arm Plyometric page.

Warm up

A thorough warm up is essential prior to plyometric training. Attention should be given to jogging, stretching (static and ballistic), striding and general mobility especially about the joints involved in the planned plyometric session. A cool down should follow each session.

How many ?

It is wise not to perform too many repetitions in any one session and since it is a quality session, with the emphasis on speed and power rather than endurance, split the work into sets with ample recovery in between.

Where to do it and what to wear

For bounding exercises use surfaces such as grass or resilient surfaces. Avoid cement floors because there is no cushioning. Choose well-cushioned shoes that are stable and can absorb some of the inevitable impact. All athletes should undergo general orthopaedic screening before engaging in plyometric training. Particular attention should be given to structural or postural problems that are likely to predispose the athlete to injury.

Conditioning for plyometrics

Higher than normal forces are put on the musculoskeletal system during plyometric exercises so it is important for the athlete to have a good sound base of general strength and endurance. Most experts state that a thorough grounding in weight-training is essential before you start plyometrics. It has been suggested that an athlete be able to squat twice his body weight before attempting depth jumps. However, less intensive plyometric exercises can be incorporated into general circuit and weight training during the early stages of training so as to progressively condition the athlete. Simple plyometric drills such as skipping hopping and bounding should be introduced first. More demanding exercises such as flying start single-leg hops and depth jumps should be limited to thoroughly conditioned athletes.

Conditioning programmes to develop leg strength are detailed on the Lower Leg Conditioning page and the Leg Conditioning page.

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Features:
2-color PVC transfer logo
Heavy-duty nylon zipper
Perforations provide breathability and prevent heat build-up
Perforated Neoprene® panels covered with nylon spandex stretch for snug fit
Develop muscle toning, strengthening specific muscle groups

Develop speed, quickness, exploding power such as hip flexors, knee joints and quadriceps
Endurance, builds lower leg strength
Perform following exercises: walking, running, aerobics, bicycling, cross-country, skiing, tennis, water polo, sports medicine, rehabilitation, fitness (weight training), football, baseball, track and field hockey, skating, soccer, volleyball, martial arts, gymnastics, stairmaster, treadmill, basketball, badminton, boxing, field hockey, lacrosse, roller blading (inline skating)
Holds maximum of 30 lbs (size small holds maximum of 25 lbs)
Includes 10 lbs total

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Features:
Design causes the calves to support 100% of the body’s weight
Designed to work the calves and Achilles tendons with a force equal to 6-times the body’s weight on impact
Padded collar
Achilles protector
Nylon lace loops allow for easy lacing
“Air Mesh” breathable tongue
Lightweight synthetic upper
Strobel construction for a better fit

Rubber cup provides proper arch support for flexibility and stability
Non-marking, abrasion-resistant outsole for indoor and outdoor traction
TPU stabilizing system
TPU inserts prevent excessive flexing
Compression-molded EVA pedestal for 360-degree movement and flexibility

Strength Systems 2 lb. Heavyrope Jump Rope
Features:
Weighted jump rope
Thick rubber construction

Allows athlete to gain both a cardiovascular & upper-body strength workout in one
2-pound weights
Suggested training program is included

Young athletes

Some authors suggest that moderate jumps can be included in the athletic training of very young children (Lohman, 1989). However, great care needs to be exerted when prescribing any training procedures for preadolescent children. Because of the relatively immature bone structure in preadolescent and adolescent children the very great forces exerted during intensive depth jumps should be avoided (Smith, 1975).

Summary

Plyometric type exercises have been used successfully by many athletes as a method of training to enhance power. In order to realise the potential benefits of plyometric training the stretch-shortening cycle must be invoked. This requires careful attention to the technique used during the drill or exercise. The rate of stretch rather than the magnitude of stretch is of primary importance in plyometric training. In addition, the coupling time or ground contact time must be as short as possible. The challenge to you as coach or athlete is to select or create an exercise that is specific to the event and involves the correct muscular action. As long as you remember specificity and to ensure there is a pre stretch first then the only limit is your imagination.

Plyometric exercise and weight training can be combined in complex training sessions to further develop explosive power.

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