Does the duration of static stretching acutely interferes on the strength endurance performance?

Aline Alves da Silva, Emerson Luiz Teixeira, Vitor de Salles Painelli

Does the duration of static stretching acutely interferes on the strength endurance performance?

Číslo: 4/2019
Periodikum: Acta Gymnica
DOI: 10.5507/ag.2019.019

Klíčová slova: muscle strength, exercise test, range of motion, stretching

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Anotace: Background: Stretching may promote detrimental effects on power output and maximal strength, but its direct effect on strength endurance remains unclear, as well as the influence of stretching duration.

Objective: We aimed to evaluate the direct effect of static stretching of the quadriceps muscle, as well as the stretching duration, on the strength endurance during a unilateral knee extension exercise.

Methods: Fifteen strength-trained men (age 28 ± 3 years, height 1.70 ± 0.09 m, body mass 70 ± 5 kg, training experience 5 ± 1 years) took part in a randomized counterbalanced cross-over study. Participants' total number of repetitions was assessed during strength endurance tests (four sets until failure at 70% of one-repetition maximum) performed under three different conditions in separate days: control - no stretching (CON), short-duration stretching (SDS) and long-duration stretching (LDS). Three stretching exercises, with 3 sets lasting 30 seconds each, were performed during SDS, while the number of sets during LDS was doubled. Data were analyzed using mixed models and magnitude-based inferences (MBI).

Results: Despite of a significant decrease in the number of repetitions during the strength endurance test performed across the exercise sets (main Set effect p < .001), neither the number of repetitions in each set (main Condition effect p = .95) nor the total number of repetitions (main Condition effect p = .86) were significantly different between the conditions. MBI analysis revealed that changes in the total number of repetitions after SDS and LDS were mainly trivial compared to CON.

Conclusions: Regardless of its duration, an acute session of static stretching did not influence strength endurance.