Effect of different forms of strength training on lower limb power and speed of professional soccer players
Department of Sport Theory, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland.
Research Article
World Journal of Advanced Research and Reviews, 2023, 20(02), 858–867
Article DOI: 10.30574/wjarr.2023.20.2.2334
Publication history:
Received on 06 October 2023; revised on 12 November 2023; accepted on 15 November 2023
Abstract:
Research objective: The main research objective is to analyze the effects of different forms of strength training on the lower limb power and speed of professional soccer players. The research involves the application of a variation strategy in strength training based on varying the intensity of training. The work focuses on comparing two strength training varying external loads.
Materials and Methods: The study material consisted of a group of 56 soccer players of the first Polish league, representing a similar sports level with a minimum of 4 years of training experience in the league and in the age range of 22 to 28 years. The study was carried out in the macro-cycle of the preparatory phase in the period after the end of the fall round league games. A 4-week training program was used, during which the players studied carried out an experimental training unit twice a week. One group worked with a load of 50-60% of 1RM (GB1), while the other group worked with a load of 70-80% of 1RM (GB2). The use of pneumatic devices the Keiser Leg Press A420 and Keiser Air Squat A300 (Keiser, Fresno, CA, USA) was used to measure the generated power of the lower limb muscles. A straight-line running test was used to measure speed abilities. A Microgate Witty photocell measurement system (Bolzano, Italy) was used to record running speed variables over a distance of 30 meters. Before the start of the training program, as well as after its completion, the level of locomotor speed and lower limb power were measured.
Results: Analyzing the levels of lower limb muscular power and locomotor speed during training with an external load of 50-60% 1RM versus training with an external load of 70-80% 1RM, statistically significantly better results were noted during training with an external load of 50-60% 1RM.
The GB1 group with training using an external load of 50-60% 1RM achieved significantly better results than the GB2 group with training using an external load of 70-80% 1RM for 9 variables: double-leg bench press, single-leg bench press (right limb), single-leg bench press (left limb), double-leg squat, single-leg squat (right limb), and sprints over distances of 5m, 10m, 20m, 30m. It was also possible to observe a certain increasing trend in the results in the single-leg squat (left limb), while not statistically significant.
Conclusions: Training with an external load of 50-60% 1RM during the preparatory period after the fall round league games is more effective in improving muscle power and speed than training with an external load of 70-80% 1RM.
Keywords:
Strength training; The power of the lower limbs; The locomotive speed; Professional soccer players; Keiser; Microgate Witty
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