مقایسه تاثیر تمرینات اختصاصی والیبال روی سطوح تمرینی مختلف بر لاکتات خون و کوفتگی عضلانی متعاقب یک جلسه فعالیت ورزشی حاد در پسران والیبالیست

زمینه و هدف: هدف از مطالعه حاضر، بررسی تاثیر شش هفته تمرینات اختصاصی والیبال روی سطوح تمرینی مختلف بر لاکتات خون و کوفتگی عضلانی متعاقب یک جلسه فعالیت ورزشی حاد در پسران والیبالیست بود.مواد و روش‌ها: سی و شش پسر والیبالیست (میانگین سنی، 82/0 ± 11/16 سال ؛ قد، 85/4 ± 174 سانتی متر) به صورت تصادفی در سه گروه12 نفری تمرینی بتن، کفپوش و ماسه قرار گرفتند. در مرحله پیش آزمون لاکتات خون با دستگاه لاکتومتر، قبل و بلافاصله فعالیت ورزشی حاد (10 × 10 پرش عمودی با یک دقیقه استراحت بین هر نوبت) و میزان کوفتگی عضلات بازکننده زانو بلافاصله، 24 و 48 ساعت پس از انجام یک جلسه فعالیت حاد با مقیاس آنالوگ بصری (vas) اندازه گیری شد. بعد از شش هفته تمرینات اختصاصی والیبال روی سطوح تمرینی بتن، کفپوش و ماسه مرحله پس آزمون همانند مرحله پیش آزمون اجرا شد. داده های جمع آوری شده با استفاده از آزمون های تحلیل واریانس دو طرفه با اندازه گیری مکرر، تحلیل واریانس یک طرفه، تعقیبی بونفرونی و توکی با سطح معنی داری 05/0

the effect of volleyball specific training on different training surfaces on blood lactate and muscle soreness following one session of acute exercise in boy volleyball players

background & purpose: the purpose of the present study was to investigate the effect of six weeks of volleyball specific training on different training surfaces on some selected fitness factors and blood lactate response and muscle soreness after an acute exercise in volleyball boys.methodology: thirty-six boy volleyball players (mean age, 16.11±0.82 years; height, 174±4.85 cm) were purposeful and random assigned to three equal groups of concrete, floor and san. at the pre-test phase and at the floor surface, blood lactate with lactometer before and immediately after acute exercise(10 x 10 vertical jump with one minute rest between set), and knee extensor muscle soreness were measured immediately, 24 and 48 hours after acute exercise with visual analogue scale (vas). after six weeks of volleyball specific training on the concrete, floor and sand training surfaces, the post-test was performed just like the pre-test phase.results: the results showed significant decrease in lactate resting levels between the floor and sand groups compared to concrete and between the sand group as compared to the floor group (p=0.01). lactate significantly decreased in response to the second acute exercise between the floor and sand groups compared to concrete (p=0.01). but there was no significant difference between the lactate reduction of the sand group and the floor (p=0.87). there was no significant difference between the three groups in muscle soreness immediately and 48 hours after a session of acute exercise (p=0.45). however, there was a significant difference between the concrete and sand groups in the reduction of muscle soreness 24 hours after an acute exercise session (p=0.01). but no significant reduction was observed between concrete and flooring (p=0.06) and sand and flooring (p=0.99).conclusion: six weeks of volleyball specific training on sand and floor surfaces compared to concrete surface decreased blood lactate and reduced muscle soreness in response to an acute exercise session in volleyball players. as a result, it is better for teachers and coaches of physical education classrooms (volleyball) held in gymnasiums and, where possible, by constructing playgrounds with sandy surfaces.