Tuesday, 28 May 2024

Bosco Ergo Jump Protocol

The Bosco Ergo Jump System is a series of jump tests developed by Carmelo Bosco to assess leg muscular mechanics and power. This protocol includes various jumps, each measuring different muscle characteristics. Let’s explore each jump in detail.

Squat Jump (SJ)

The Squat Jump test starts with the knees flexed at 90 degrees and hands resting on the hips.

Squat Jump with extra weight (SJ+)

This test is similar to the Squat Jump, but with an additional load placed on the shoulders, simulating a squat weight lifting exercise.

CounterMovement Jump (CMJ)

The CounterMovement Jump starts in a standing position, and the athlete squats down to the 90-degree leg bend position before immediately jumping up. Hands remain on hips throughout the test.

Abalakov Jump (ABK)

The Abalakov Jump is a traditional vertical jump test that allows swinging of the arms.

Drop Jump (DJ)

This test involves jumping after a drop from a given height, with hands on hips. The test is performed from standardized drop heights of 20 cm, 40 cm, 60 cm, 80 cm, and 100 cm.

Repetitive Jump (RJ)

The Repetitive Jump is a continuous Squat Jump that can last from 5 to 60 seconds.

Measurement Systems

While the Bosco Ergo Jump Protocol can be measured using standard timing mats or vertical jump test equipment, specialized systems have been developed to calculate and analyze results more accurately. Some of these systems include ErgoJump, ErgoPower, and Muscle-Lab.

  • The Bosco Ergojump System by Byomedic measures flight time during the vertical jump. It consists of a digital timer connected to two infrared bars. The timer is triggered by the subject’s feet upon release from the platform and stops upon contact during descent. The system performs various calculations based on the recorded data.
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Other vertical jump equipment, such as the Just Jump mat, Myotest, and infrared laser system, can also be used for vertical jump testing.


The results obtained from the Bosco Ergo Jump tests allow for the calculation of relevant muscle-strength related indexes (Bosco et al., 1983), such as:

  • The Elasticity Index: Elastic Energy = ((CMJ – SJ) / CMJ) x 100
  • The Upper Limbs Coordination Index: ((ABK – CMJ) / ABK) x 100
  • Percentage of Fast-Twitch Fibers


  • Bosco C, Luhtanen P, Komi PV (1983) A simple method for measurement of mechanical power in jumping. European Journal of Applied Physiology 50:273-282.


Q: Can I use standard timing mats to measure the Bosco Ergo Jump tests?
A: Yes, standard timing mats can be used, but specialized systems like the Bosco Ergojump System provide more accurate calculations.

Q: Are there other vertical jump equipment options available?
A: Yes, apart from the Bosco Ergojump System, other equipment like the Just Jump mat, Myotest, and infrared laser system can be used for vertical jump testing.

Q: What are the muscle-strength related indexes calculated from the Bosco Ergo Jump tests?
A: The calculated indexes include the Elasticity Index, Upper Limbs Coordination Index, and Percentage of Fast-Twitch Fibers.


The Bosco Ergo Jump Protocol is a comprehensive series of jump tests developed by Carmelo Bosco for assessing leg muscular mechanics and power. By incorporating different jumps and specialized measurement systems, this protocol provides valuable insights into muscle characteristics and strength-related indexes. Whether using standard equipment or specialized systems like the Bosco Ergojump System, these tests offer a reliable way to evaluate vertical jump performance and optimize training programs.

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