Abstract
Background: Futsal is one of the most popular sport in Brazil with millions of players worldwide. It is characterized by intermittent stimuli of high intensity anaerobic actions. Recently, studies have shown that imagery resistance training (IRT), like conventional strength training, can increase muscle strength, making it reasonable to think that this effect can also be transferred to muscle power. Purposes: we aimed to verify the acute responses of IRT on muscle power in teenage Futsal players. Methods: fifteen Futsal athletes were enrolled and underwent three visits to the laboratory: 1) familiarization with the resistance exercise they would undergo; 2) one them for vertical jump test after the IRT session and the other one for control session, without any intervention before vertical jump test. Sessions 2 and 3 being applied in random order. Results: the results indicate that acute IRT improved muscle performance, since it produced higher power output [3134.5 Watts (2744 - 3796.3)] than control session [2952.4 Watts (2637.55 - 3433.45)] (Z=3.4078; p=0.0007). In addition, all participants in IRT group showed some improvement after the IRT session. Conclusions: a single imagery resistance exercise session can increase acute muscle power output in teenage Futsal athletes.
Highlights
It is noteworthy that 100% of the participants showed some improvement after imagery resistance training (IRT) session, with an average improvement of 8.3% (Figure 3)
The results of the present study indicate that the IRT, performed previously the activity that requires muscular power, can be an auxiliary or alternative method to the conventional strength exercise to induce effects similar to potentiation response (PAP)
It is known that IRT positively affect muscle strength
Summary
Futsal is practiced in more than 100 countries with a growing popularity and millions of players worldwide (Berdejodel-Fresno et al, 2014). Data suggest that futsal is the most practiced sport in Brazil, especially during school ages (Moura & Salles, 2005). Studies have shown that imagery resistance training (IRT) can increase muscle strength (Lebon et al, 2010; Ranganathan et al, 2004; Reiser, 2011). Studies have shown that imagery resistance training (IRT), like conventional strength training, can increase muscle strength, making it reasonable to think that this effect can be transferred to muscle power. Results: the results indicate that acute IRT improved muscle performance, since it produced higher power output [3134.5 Watts (2744 - 3796.3)] than control session [2952.4 Watts (2637.55 - 3433.45)] (Z=3.4078; p=0.0007). Conclusions: a single imagery resistance exercise session can increase acute muscle power output in teenage Futsal athletes.
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