التفاصيل البيبلوغرافية
| العنوان: |
Effect of verbal encouragement on quadriceps and knee joint function during three sets of knee extension exercise. |
| المؤلفون: |
Lee, Hyunwook, Shin, Jaeyoon, Kim, Daeho, Park, Jihong |
| المصدر: |
Isokinetics & Exercise Science; 2021, Vol. 29 Issue 2, p155-162, 8p |
| مصطلحات موضوعية: |
KNEE physiology, COLLEGE students, MUSCLE contraction, RANGE of motion of joints, MOTIVATION (Psychology), MUSCLE fatigue, RANDOMIZED controlled trials, QUADRICEPS muscle, DESCRIPTIVE statistics, ISOKINETIC exercise, STATISTICAL sampling, EXERCISE therapy |
| مستخلص: |
BACKGROUND: Although the common practice of verbal encouragement is scientifically supported, its effect on the maintenance of force output in fatiguing exertions is unknown. OBJECTIVE: To examine the effects of verbal encouragement on exercise-induced quadriceps and knee joint function during three sets of knee extension exercise. METHODS: Sixty-five healthy males (23.3 years, 175.8 cm, 75.3 kg) underwent testing using the administration of verbal encouragement (n = 32) or not (n = 33) during assessment of quadriceps and knee joint function. Assessments were performed at baseline and times 1, 2, and 3. The knee concentric isokinetic extension at 60 ∘ /s, was performed between the time points. For quadriceps function, maximal isometric strength and activation (central activation ratio) were recorded. Absolute error values on knee flexion replications at 15 ∘ or 45 ∘ were recorded for knee joint function. RESULTS: There was no verbal encouragement effect over three sets of exercise in quadriceps strength (condition × time: F 3 , 189 = 1.71, p = 0.17) and knee flexion replication (condition × time for 15 ∘ : F 3 , 189 = 0.11, p = 0.96; 45 ∘ : F 3 , 189 = 0.63, p = 0.6). However, subjects who had received verbal encouragement maintained quadriceps activation (condition × time: F 3 , 189 = 5.49, p = 0.001). Specifically, quadriceps activation in the verbal condition was 3.0% higher at time 2 (p = 0.01) and 4.7% higher at time 3 (p = 0.0003) versus in the non-verbal condition. CONCLUSIONS: Verbal encouragement appears to be effective in maintaining central activation, but is insufficient for promoting strength. This supports the idea that peripheral contributing factors play a larger role in force production when performing multiple sets of exercises. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
